Chemical interaction between amorphous silica mineral and highly alkaline plume with Ca ion
|
|
- Neal Sims
- 6 years ago
- Views:
Transcription
1 Chemical interaction between amorphous silica mineral and highly alkaline plume with Ca ion Usui H. 1, Niibori Y. 1, Kadowaki J. 1, Tanaka K. 1, Tochiyama O. 2, Mimura H. 1 1 Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University, Sendai, Japan 2 Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan Abstract In the geological disposal system, a large amount of cement is used for the construction. Such a material alters the groundwater to highly alkaline and high Ca concentration [1-3]. This highly alkaline plume containing Ca induces dissolution and precipitation reaction with surrounding rock matrix, and affects the migration of radionuclides. This study focused on the dynamic change of porous amorphous silica in highly alkaline plume containing Ca in both continuous-flow column and batch conditions. The amorphous silica mineral (75-1 diameter, BET surface area 350 m 2 /g) was contacted with Ca(OH) 2 solution (column experiment: 0.78, 4.37, and 8.48 mm; batch experiment: 0.62, 3.00, and 9.22 mm). The ph value was always adjusted to by the addition of NaOH solution. Then, under each experimental condition, the concentration change of both Ca and Si was monitored by ICP-AES. Further, the distribution of Ca on the cross section of silica mineral was observed by EPMA. The solid-liquid ratio of batch experiment was determined from the ratio of solid amount in the column to the total volume of injected solution in the column experiment. The experimental results showed that in either case Ca deposited not only on the surface of the silica mineral but also in the inner pores of the mineral, although the change in Ca consumption amount was quite different under the column and batch condition. Moreover, at relatively high concentration of Ca (8.48 to 9.22 mm), the dissolution rate of SiO 2 in the column condition was larger than that under the batch condition. While the alteration of silica mineral induced by the alkaline plume with Ca ion is very complicated, these results suggest that the flow condition on the solid surface is a key factor to estimate the spatial area altered by the alkaline plume in the near field of the repository. 1. Introduction For the performance assessment of the geological disposal system, the chemical reaction occurring in the natural barrier is one of the key factors that affect the migration of the released radionuclide. Whether natural barrier is sedimentary or crystalline, it contains the SiO 2 as the major component. On the other hand, for the construction of the geological disposal system, a large amount of concrete is used, and such cementitious
2 material may alter the condition of groundwater to a highly alkaline and high Ca concentration. Such groundwater is called highly alkaline plume. The silica has very large solubility under alkaline conditions [4-5]. On the other hand, soluble silicic acid reacts with Ca species (Ca 2+, CaOH +, etc), and may precipitate immediately as calcium-silicate-hydrate (CSH gel). That is, the reaction between rocks and highly alkaline plume induces dissolution and/or precipitation, depending on the concentration of Ca species. Usui et al. reported that Ca concentration dramatically affect such chemical reaction [6]. Moreover, this phenomenon resulted from the column flow condition. In this study, the dynamic behaviors of porous amorphous silica induced by the highly alkaline plume were examined in the two conditions of continuous-flow column and batch. 2. Experimental Figure 1 shows the experimental apparatus of batch experiment (a) and column experiment (b). In both experiment, Ca(OH) 2 solution is liquid phase and amorphous slilca particle is solid phase, and the system is isolated from air by N 2 gas. The amorphous silica particles were sieved to 75-1 diameter, and deaerated in the pure water. The chemical composition of amorphous silica is SiO2 0.38H 2 O, measured by TG from 378 K to 1073 K (i.e., the amount of sorbed water is excluded). The specific surface area of amorphous silica particle was 350 m 2 /g estimated by BET method using N 2 gas, and the apparent specific gravity was 2.0 g/cm 3 [7] (a) Batch experiment Sampling hole N 2 gas (b) Column experiment Amorphous silica packed bed column N 2 gas Reaction vessel Stirrer Ca(OH) 2 solution Filter Sample collection Ca(OH) 2 solution Amorphous silica particles Pump Figure 1 experimental apparatus of batch experiment (a) and column experiment (b) The ph value of the solutions was adjusted to by the addition of NaOH solution. In general, the
3 dissolution of amorphous silica decreases the ph value of the solution. However, this study confirmed in advance that the change was negligible small in the limited experiment periods. The Ca concentration value of the solution was 0.78, 4.37 or 8.48 mm in the column experiment, and 0.62, 3.00 or 9.22 mm in the batch experiment. The sample was taken by 1 ml at 20 min intervals until 180 or 200 min, and the Ca and Si concentration of the sample were measured by ICP-AES. Further, in either experiment, the surface structure of solid particle was observed by SEM micrograph, and the distribution of Ca on the cross section of solid particle was measured by EPMA. In the batch experiment, the volume of solution was 500 ml, and the solution was stirred by magnetic stirrer. The solid-liquid ratio of batch experiment was determined by the ratio of solid amount in the column to the total volume of solution injected into the column. The aliquots were filtrated before the measurement, in order to avoid the contamination of the solid particles. In the column experiment, average flow rate of the feed solution was about 1.1 mm/sec. The feed solution was continuously injected from the bottom side of the packed bed. The eluted solution from the packed bed is collected and measured the Ca and Si concentration. 3. Result and discussion Figure 2 shows the Ca consumption amount (a) and Si fraction dissolved (b) with time, where Si fraction dissolved is the ratio of dissolved SiO 2 to the initial SiO 2 amount in the reaction vessel (batch experiment) and packed bed (column experiment). Figure 2-a shows apparent difference in the Ca consumption with time. In the column condition, Ca consumption increases gradually with time. On the other hand, in the batch condition, Ca consumption rapidly increased until 20 min, and gradually increased. As shown in Figure 2-b, when the Ca concentration is relatively high, the dissolution of Si was very limited because of the products of CSH. (a) (b) Ca consumption Ca Á ï amount Ê[mmol] [mmol] column-0.78 column-0.78 mm mmcolumn-4.37 mm mm column-8.48 mm mm batch-0.62 batch-0.62 m M m M batch-3.80 mmm M batch-10.3 mmm M Time time [min] Si fraction Si n ð dissolved ª column-0.78 column-0.78 mm mm column-4.37 column-4.37 mm mm column-8.48 column-8.48 mm mm batch-0.62 batch-0.62 m M m Mbatch-3.80 mmm batch-10.3 m Mm M Time time [min] Figure 2 shows the amount of Ca consumption (a) and Si fraction dissolved (b) with time However, the dissolution rate (calculated by the Si fraction dissolved after 20min) was about 3.6 times higher
4 than that of batch condition, although the Ca concentration injected into the colume (0.78 mm) was a little higher than the initial Ca-concentration of the batch experiment (0.62 mm). This suggests that the chemical reaction of Ca species to the surfaces of solid phase including the inner pores of particle is not always uniform spatially in the column flow system, particularly when the Ca concentration is relatively small. Figure 3 shows the SEM and EPMA micrograph of the cross section of the packed particle reacted in batch condition and in the column condition. (In this figure, the value such as 0.33 mm is the initial Ca concentration in the batch experiments or the feed concentration of Ca in the column experiments. Further, the time such as 1 min or 180 min means the observation time after the start of each experiment.) Batch experiment, 1 min Batch experiment, 180 min a) SEM Ca d) SEM Ca b) e) c) f) a) 0.33 mm b) 2.87 mm c) 8.35 mm d) 0.62 mm e) 3.80 mm f) 10.3 mm Column experiment SEM Ca g) h) g) 0.78 mm : 170 min h) 4.37 mm : 20 min i ) 4.37 mm : 180 min i) Figure 3 SEM and EPMA micrograph of packed particle after the reaction in batch condition (a ~ f) and column condition (g ~ i) These results indicate the precipitation of CSH gel is not only on the outer surface of the particle but also on the surface of the inner pore of the particle. Moreover, as shown in the micrograph after the 1min, Ca species
5 immediately spread over the inner regions of the particle through the inner pores, and react with the dissolved silicic acid. Figure 4 shows the surface structure of the amorphous silica particle of the batch and column experiments. At the relatively high Ca concentration, the deposit with fiber form appeared on the outer surface. Such behaviors are confirmed either in the batch and column experiment. Batch experiment (A) (B) (C) (D) Before Reaction [Ca] total = 0.62 mm [Ca] total = 3.80 mm [Ca] total = mm Column experiment (a) (b) (c) Before Reaction [Ca] total = 0.78 mm [Ca] total = 4.37 mm Figure 4 SEM micrograph of the amorphous silica s surface after the reaction; in batch condition (A ~ D) and column condition (a ~ c).
6 4. Conclusions In this study, the chemical reaction between Ca(OH) 2 solution and amorphous silica mineral in the batch condition and column condition was compared. The experimental result showed that Ca species to the silica surfaces including the inner pores of particle is not always uniform spatially in the column flow system. While, in the batch condition, Ca species in the solution were quickly uptaken, and the dissolution of Si was limited compared to that of column condition. These suggest that the flow condition on the solid surface is a key factor to estimate the spatial area altered by the alkaline plume in the near field of the repository, although the alteration of silica mineral induced by the alkaline plume with Ca ion is very complicated. 5. References [1] Savage, D., Noy, D., Mihara, M., Modelling the interaction of bentonite with hyperalkaline fluids, Applied Geochemistry, 17, 207 (2002). [2] Usui, H., Niibori, Y., Tanaka, K., Tochiyama, O., Mimura, H., Fundamental Experiments on Permeability Change of Flow-path by Highly alkaline Plume, Scientific Basis for Nuclear Waste Management XXVIII, edited by Hanchar J. M. and Stroes-Gascoyne S. and Browning L., Mat. Res. Soc. Symp. Proc., 824, 449 [3] (2004). Harris A.W., Manning M.C., Tearle W.M., Tweed C.J., Testing of models of the dissolution of cements leaching of synthetic CSH gels, Cement and Concrete Research, 32, 731 (2002). [4] Stumm, W., Morgan, J. J., Aquatic Chemistry, 3rd ed. (John Wiley & Sons, New York, 1996), p [5] Chida, T., Niibori, Y., Tochiyama, O., and Tanaka, K., Dynamic Behavior of Colloidal Silica in the Presence of Solid Phase Scientific Basis for Nuclear Waste Management XXVI, edited by Finch R. J. and Bullen D. B., Mat. Res. Soc. Symp. Proc., 757, 497 (2003). [6] Usui H., Niibori Y., Tanaka K., Tochiyama O., Mimura H., Effects of Calcium Ion in Highly Alkaline Plume on Permeability Change of Flow-Path, Mat. Res. Soc. Symp. Proc., (2005) -in press- [7] Niibori, Y., Kunita, M., Tochiyama, O., and Chida, T., Dissolution Rates of Amorphous Silica in Highly Alkaline Solution, J. Nucl. Sci. Technol., 37, 349 (2000).
Dissolution Rates of Amorphous Silica in Highly Alkaline Solution
Journal of Nuclear Science and Technology ISSN: 0022-3131 (Print) 1881-1248 (Online) Journal homepage: http://www.tandfonline.com/loi/tnst20 Dissolution Rates of Amorphous Silica in Highly Alkaline Solution
More informationSILICA SCALE PREVENTION METHOD USING SEED MADE FROM GEOTHERMAL BRINE
SILICA SCALE PREVENTION METHOD USING SEED MADE FROM GEOTHERMAL BRINE Hajime Sugita, Isao Matsunaga, Tsutomu Yamaguchi Geo-Energy Division, Geotechnology Department, National Institute for Resources and
More informationbleeding during sample preparation. The specimens were demolded at hours and sealed with aluminum foil. Afterward, the sealed samples were stored at C
コンクリート工学年次論文集,Vol.3,No.1,1 - Technical Paper - CHEMICAL EVOLUTION OF CEMENT-BASED MATERIALS IN SODIUM AND MAGNESIUM SULFATE SOLUTIONS Yogarajah ELAKNESWARAN *1, Tetsuya ISHIDA * ABSTRACT This paper presents
More informationRemoval of Phosphate from Aqueous Solution by Crystallization Using Coal Fly Ash
Removal of Phosphate from Aqueous Solution by Crystallization Using Coal Fly Ash Katsutoshi Yamada 1, Kensaku Haraguchi 1, Carmel C. Gacho 2, Lucila S. Salinas 2, Christopher M. Silverio 2 and Bussakorn
More informationEffect of Pozzolan on Cement-bentonite Interaction in Nuclear Waste Management
Effect of Pozzolan on Cement-bentonite Interaction in Nuclear Waste Management Kenichiro NAKARAI 1* and Yuki YOKOYAMA 2 1 Hiroshima University, Japan 2 Yokohama National University, Japan * 1-4-1 Kagamiyama,
More informationCeramic Processing Research
Journal of Ceramic Processing Research. Vol. 16, Special. 1, pp. s40~s44 (2015) J O U R N A L O F Ceramic Processing Research Influence of lead, chromium and zinc ions as toxic heavy metals between C-S-H
More informationMC-RIM PW. Long-term Surface Protection for Potable Water Containers through DySC Technology
MC-RIM PW Long-term Surface Protection for Potable Water Containers through DySC Technology MC-RIM PW Perfect Imperviousness through DySC Technology Potable water containers must be constructed and operated
More informationMICROSTRUCTURE OF AUTOCLAVED AERATED CONCRETE SUBJECTED TO CARBONATION Durability of Autoclaved Aerated Concrete
MICROSTRUCTURE OF UTOCLVED ERTED CONCRETE SUBJECTED TO CRBONTION Durability of utoclaved erated Concrete F. MTSUSHIT, Y. ONO, S. SHIBT Sumitomo Metal Mining Co.,Ltd, Housing & Construction Materials Division,
More informationWater supplied by Marafiq does not meet the process requirements.
WATER TREATMENT In Industries Water is used for: a. Drinking b. Cleaning c. Cooling d. Producing Steam e. Process requirement Why we need to treat water? For human consumption a. Water to be purified (Make
More information- paste cement-water mix allowing setting and hardening to occur w/c: setting stiffening without significant increase in strength
Definition - w/c, w/s water to cement / solid ratio by mass - paste cement-water mix allowing setting and hardening to occur w/c: 0.3-0.6 - setting stiffening without significant increase in strength -
More informationTechnology, Japan ABSTRACT
Control of crystal polymorphism of CaCO 3 generated by self-healing under controlled temperature and ph *Risa Sengoku 1), Heesup Choi 2) and Masumi Inoue 3) 1), 2), 3) Department of Civil and Environmental
More informationAn Experimental Investigation on the behaviour of Portland Cement Concrete and Geopolymer Concrete in acidic environment
An Experimental Investigation on the behaviour of Portland Cement and Geopolymer in acidic environment Kolli Venkata Manjeeth, J. Sri Kalyana Rama 1 (Student, Civil Engineering Department, BITS PILANI
More informationCARBONATION OF WOLLASTONITE USING SUPERCRITICAL CARBON DIOXIDE
CARBONATION OF WOLLASTONITE USING SUPERCRITICAL CARBON DIOXIDE Clifford Y. Tai*, W.-R. Chen and Shin-Min Shih Department of Chemical Engineering National Taiwan University Email: cytai@ntu.edu.tw The feasibility
More informationConcrete. Chapter 11 Durability of Concrete & Mix Design. Materials of Construction-Concrete 1. Wikipedia.org
Wikipedia.org Concrete Chapter 11 Durability of Concrete & Mix Design Materials of Construction-Concrete 1 Durability of hardened concrete Materials of Construction-Concrete 2 Leaching and efflorescence
More informationMicrosilica in Concrete
Microsilica in Concrete Henan Superior Abrasives I/E Co., Ltd Microsilica is a byproduct from silicon metal or ferrosilicon industries, where these metals are produced in submerged electric arc furnaces.
More informationGeological Storage of CO2. Evaluating the Risk of Leakag! Injection & Leakage
Geological Storage of CO Evaluating the Risk of Leakag! Injection & Leakage Reservoir model must predict composition of brine that comes into contact with cement From Canadian CO Capture and Storage Roadmap
More informationNKS Seminar on Decommissioning of Nuclear Facilities, September 14-16, 2010
NKS Seminar on Decommissioning of Nuclear Facilities, September 14-16, 2010 Behaviour of Carbon-14 Released from Activated Steel in Repository Conditions a Key Issue in the Long-term Safety of Decommissioning
More informationA trial of extracting gold from stream sediment and High Au/Ag ore organic system
A trial of extracting gold from stream sediment and High Au/Ag ore using halogen-containing organic system H. Murakami and Y. Nakao Institute for Geo-Resources and Environment, AIST Geological Survey of
More informationPHYSICAL-CHEMICAL TREATMENT OF METALS AND RADIONUCLIDES IN THE SATURATED ZONE USING COLLOIDAL BUFFERS EOS Remediation, LLC.
PHYSICAL-CHEMICAL TREATMENT OF METALS AND RADIONUCLIDES IN THE SATURATED ZONE USING COLLOIDAL BUFFERS - 12515 Yenjung Lai 1, Robert C. Borden 1, Ed Alperin 2 1 North Carolina State University, Raleigh,
More information- paste cement-water mix allowing setting and hardening to occur w/c: setting stiffening without significant increase in strength
Definition - w/c, w/s water to cement / solid ratio by mass - paste cement-water mix allowing setting and hardening to occur w/c: 0.3-0.6 - setting stiffening without significant increase in strength -
More informationSilica Fume in Concrete
Silica Fume in Concrete Silica Fume... Very fine noncrystalline silica produced in electric arc furnaces as a byproduct of the production of elemental silicon or alloys containing silicon; also known as
More informationPore Solution Analysis as a Tool for Studying Early Age Hydration & Predicting Future Durability R.D. Hooton, T. Ramlochan, and M.D.A.
Pore Solution Analysis as a Tool for Studying Early Age Hydration & Predicting Future Durability R.D. Hooton, T. Ramlochan, and M.D.A. Thomas Cement Hydration Summit, Quebec, July 2009 Contents Obtaining
More informationCO 2 Well Integrity and Wellbore Monitoring
Oct 19 2007 CSLF Workshop Porto Alegre, Brazil CO 2 Well Integrity and Wellbore Monitoring Andrew Duguid Why Worry About Wellbore Integrity 2 CO 2 Volumes The volume of CO 2 is so large that there will
More informationAn Introduction to Soil Grouting
An Introduction to Soil Grouting J. Paul Guyer, P.E., R.A. Paul Guyer is a registered civil engineer, mechanical engineer, fire protection engineer, and architect with over 35 years experience in the design
More informationTHE INFLUENCE OF TRIETANOLAMINE (TEA) ON CHARACTERISTICS OF FRESH AND HARDENED MORTARS CONTAINING LIMESTONE POWDER
NATURA MONTENEGRINA, Podgorica, 9(3):867-881 THE INFLUENCE OF TRIETANOLAMINE (TEA) ON CHARACTERISTICS OF FRESH AND HARDENED MORTARS CONTAINING LIMESTONE POWDER Jozefita MARKU*, Vaso KOZETA**, Caja SHQIPONJA
More informationChemical Activation of Low Calcium Fly Ash Part 1: Identification of Suitable Activators and their Dosage
Chemical Activation of Low Calcium Fly Ash Part 1: Identification of Suitable Activators and their Dosage P. Arjunan 1, M. R. Silsbee 2, and D. M. Roy 2, 1 Custom Building Products, 6515, Salt Lake Ave,
More informationOptimum Conditions for Phosphorus Recovery from Steelmaking Slag with High P 2 O 5 Content by Selective Leaching
ISIJ International, Vol. 58 (2018), ISIJ International, No. 5 Vol. 58 (2018), No. 5, pp. 860 868 Optimum Conditions for Phosphorus Recovery from Steelmaking Slag with High P 2 O 5 Content by Selective
More informationClaudia Cardona, Yelena Katsenovich, Leonel Lagos Applied Research Center Florida International University. Session # 064, Abstract # 14434
Claudia Cardona, Yelena Katsenovich, Leonel Lagos Applied Research Center Florida International University March 2 March 6, 2014 Phoenix, Arizona Session # 064, Abstract # 14434 Outline Background Objective
More informationIMPROVING SULFATE RESISTANCE OF MORTARS PRODUCED WITH SANDS CONTAMINATED BY NATURAL SULFATE
International RILEM Conference on Material Science MATSCI, Aachen 2010 Vol. III, AdIPoC 231 IMPROVING SULFATE RESISTANCE OF MORTARS PRODUCED WITH SANDS CONTAMINATED BY NATURAL SULFATE H. N. Atahan, D.
More informationCERAMIC MATERIALS I. Asst. Prof. Dr. Ayşe KALEMTAŞ. Office Hours: Thursday, 09:30-10:30 am.
CERAMIC MATERIALS I Office Hours: Thursday, 09:30-10:30 am. akalemtas@mu.edu.tr, akalemtas@gmail.com, Phone: 211 19 17 Metallurgical and Materials Engineering Department CLASSIFICATION OF CERAMICS Ceramic
More informationRecovery of Phosphorus from Modified Steelmaking Slag with High P 2 O 5 Content via Leaching and Precipitation
ISIJ International, Vol. 58 (2018), ISIJ International, No. 5 Vol. 58 (2018), No. 5, pp. 833 841 Recovery of Phosphorus from Modified Steelmaking Slag with High P 2 O 5 Content via Leaching and Precipitation
More informationAdmixtures CIVL
Admixtures CIVL 3137 88 Admixtures admixture (n.) any material other than water, aggregates, hydraulic cement and fiber reinforcement, used as an ingredient of concrete or mortar, and added to the batch
More informationCalcium silicate hydrate (C-S-H) gel dissolution and ph buffering in a cementitious near field
Mineralogical Magazine, December 2012, Vol. 76(8), pp. 3045 3053 Calcium silicate hydrate (C-S-H) gel dissolution and ph buffering in a cementitious near field G. M. N. BASTON, A.P.CLACHER, T.G.HEATH*,
More informationImpact of ph on Soil and Groundwater Remediation RE3 Conference November 14, 2012 Brad Elkins Technical Sales Representative
Impact of ph on Soil and Groundwater Remediation RE3 Conference November 14, 2012 Brad Elkins Technical Sales Representative 919.873.2204 Importance of ph Impacts conditions of silts and clays Controls
More informationAdmixtures CIVL
Admixtures CIVL 3137 1 Admixtures admixture (n.) any material other than water, aggregates, hydraulic cement and fiber reinforcement, used as an ingredient of concrete or mortar, and added to the batch
More informationSelf-Compacting Concrete Incorporating Various Ratios of Rice Husk Ash in Portland Cement*
CMU. J. Nat. Sci. (2013) Vol. 12(2) 111 DOI: 10.12982/CMUJNS.2013.0010 Self-Compacting Concrete Incorporating Various Ratios of Rice Husk Ash in Portland Cement* Gritsada Sua-Iam 1 and Natt Makul 2* 1
More informationAcid Attack on PCCP Mortar Coating. Dipayan Jana, P.G. 1 Richard A. Lewis, P. E. 2
Acid Attack on PCCP Mortar Coating Dipayan Jana, P.G. 1 Richard A. Lewis, P. E. 2 Abstract During the failure investigation of a 2.59 meter (102 inch) diameter prestressed concrete cylinder pipe (PCCP)
More informationGeopolymer Cement from Alkali-Activated Natural Pozzolans: Effect of Addition of Minerals
eopolymer Cement from Alkali-Activated Natural Pozzolans: Effect of Addition of Minerals D Bondar (a), C. J. Lynsdale (b), N. B. Milestone (c), N. Hassani (d) A. A. Ramezanianpour (e) (a) Ph.D. candidate
More informationLeaching behaviour of impurities in waste gypsum board
Sustainable Development and Planning III 991 Leaching behaviour of impurities in waste gypsum board M. Tafu & T. Chohji Department of Ecomaterials Engineering, Toyama National College of Technology, Japan
More informationEFFECTS OF STONE POWDER SLUDGE ON THE STRENGTH AND MICROSTRUCTURE OF ALKALI-ACTIVATED FLY ASH PASTES
- Technical paper - EFFECTS OF STONE POWDER SLUDGE ON THE STRENGTH AND MICROSTRUCTURE OF ALKALI-ACTIVATED FLY ASH PASTES Sejin CHOI *1 Paulo J MONTEIRO *2 Moohan KIM *3 ABSTRACT Stone powder sludge is
More informationSand Control. Gravel packing is the oldest and simplest method of sand control. Works in both on and off shore wells.
Sand Control Marine deposited sands, most oil and gas reservoir sands, are often cemented with calcareous or siliceous minerals and may be strongly consolidated. In contrast, Miocene or younger sands are
More informationA FIELD DEMONSTRATION OF AN ALTERNATIVE COAL WASTE DISPOSAL TECHNOLOGY GEOCHEMICAL FINDINGS. Paul T. Behum. Liliana Lefticariu. Y.
A FIELD DEMONSTRATION OF AN ALTERNATIVE COAL WASTE DISPOSAL TECHNOLOGY GEOCHEMICAL FINDINGS Paul T. Behum Office of Surface Mining, Mid-Continent Region, Alton, IL Liliana Lefticariu Department of Geology,
More informationProperties of waste-based geopolymer building blocks
Applied Mechanics and Materials Online: 2013-08-08 ISSN: 1662-7482, Vols. 357-360, pp 935-938 doi:10.4028/www.scientific.net/amm.357-360.935 2013 Trans Tech Publications, Switzerland Properties of waste-based
More informationHigh Purity Alumina and Zeolite from Local Low Grade Kaolin
High Purity Alumina and Zeolite from Local Low Grade Kaolin Meor Yusoff M.S., Masliana Muslim, Choo Tye Foo and Julie Andrianny Murshidi Materials Technology Group, Industrial Technology Division, Malaysian
More informationSTUDIES ON SMALL IONIC DIFFUSIVITY CONCRETE
319 STUDIES ON SMALL IONIC DIFFUSIVITY CONCRETE He Xingyang, 1 Chen Yimin, 1 Ma Baoguo, 2 Li Yongxin, 1 Zhang Hongtao, 1 and Zhang Wensheng 1 1 China Building Materials Academy, Beijing, 124, PRC 2 Wuhan
More informationChapter 2. Reservoir Rock and Fluid Properties
Chapter 2 Reservoir Rock and Fluid Properties Table of Contents Pages 1. Introduction... 3 2. Rock and Minerals... 3 3. Porosity... 4 3.1. Porosity Classification... 6 3.2. Range of porosity values for
More informationPerformance of Carbon-Neutral Rice Hull Ash as a Supplementary Cementitious Material In Portland Cement Concrete
Performance of Carbon-Neutral Rice Hull Ash as a Supplementary Cementitious Material In Portland Cement Concrete Rangaraju, P.R. & Harish K.V. Clemson Univ. Vempati, R. ChK Group, Inc. Romain, J.C. Holcim
More informationSequential soil washing techniques using hydrochloric acid and sodium hydroxide for remediating arsenic-contaminated soils in abandoned iron-ore mines
Sequential soil washing techniques using hydrochloric acid and sodium hydroxide for remediating arsenic-contaminated soils in abandoned iron-ore mines Min Jang, Jung Sung Hwang, Sang Il Choi Introduction
More informationWell Stimulation and Sand Production Management (PGE 489 ) Sandstone Acidizing. By Dr. Mohammed A. Khamis
Well Stimulation and Sand Production Management (PGE 489 ) Sandstone Acidizing By Dr. Mohammed A. Khamis 23-02-2016 Sandstones Acidizing The goal of sandstone matrix acidizing is to remove siliceous particles
More informationPREPARATION OF GEOPOLYMER USING FLY ASH AND RICE HUSK SILICA AS RAW MATERIALS
18 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS PREPARATION OF GEOPOLYMER USING FLY ASH AND RICE HUSK SILICA AS RAW MATERIALS P. Chaiyapoom 1,2, S. Jiemsirilers 1,2*, S. Wada 1,2, K. Hemra 3, P.
More informationHYDRATION AND MICROSTRUCTURE DEVELOPMENT OF PORTLAND CEMENT BLENDED WITH BLAST FURNACE SLAG
HYDRATION AND MICROSTRUCTURE DEVELOPMENT OF PORTLAND CEMENT BLENDED WITH BLAST FURNACE SLAG Guang Ye (1,2), Klaas van Breugel (1) and Geert De Schutter (2) (1) Microlab, Faculty of Civil Engineering and
More informationDOPAS September 2015 Day 3. Material Reference: D3 Content Reference: 3.2.4
DOPAS Training Workshop 2015 14-18 September 2015 Day 3 Material Reference: D3 Content Reference: 3.2.4 The research leading to these results has received funding from the European Union s European Atomic
More informationRepositories with Retrievable Spent Nuclear Fuel: Four Options, Four Geologies
Repositories with Retrievable Spent Nuclear Fuel: Four Options, Four Geologies C. W. Forsberg L. R. Dole Massachusetts Institute of Technology Oak Ridge National Laboratory 77 Massachusetts Avenue P. O.
More informationEvaluation of cementation effect of sand mediated by enzymeinduced calcium carbonate precipitation
The 2012 World Congress on Advances in Civil, Environmental, and Materials Research (ACEM 12) Seoul, Korea, August 26-30, 2012 Evaluation of cementation effect of sand mediated by enzymeinduced calcium
More informationEfflorescence in Portland cement plaster finishes Tech Bulletin # 101
1) What is efflorescence? According to Merriam-Webster s Collegiate Dictionary, Tenth Edition, the verb (vi) to effloresce means a) to change to a powder from loss of water of crystallization and b) to
More informationCorrosion Characteristics of RAFM Steels and Unalloyed Metals in Static Pb-17Li )
Corrosion Characteristics of RAFM Steels and Unalloyed Metals in Static Pb-17Li ) Masatoshi KONDO and Takeo MUROGA 1) Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan 1) National
More informationHIGH STRENGTH PHOSPHATE CEMENT USING INDUSTRIAL BYPRODUCT ASHES
HIGH STRENGTH PHOSPHATE CEMENT USING INDUSTRIAL BYPRODUCT ASHES Arun S. Wagh, Seung-Young Jeong, Dileep Singh Energy Technology Division, Argonne National Laboratory 9700 S. Cass Avenue, Argonne, IL 60439
More informationWEF Collection Systems Conference Evaluation of High ph Infiltration Water and Recycled Bedding Material
Evaluation of High ph Infiltration Water and Recycled Bedding Material Keith Hobson, PE, BCEE, FOX Engineering Associates, Inc. ABSTRACT The purpose of this evaluation was to determine the cause and source
More informationPerformance of Cement for Immobilizing Strontium Waste in Saline Environment
Materials Sciences and Applications, 013, 4, 7-11 Published Online December 013 (http://www.scirp.org/journal/msa) http://dx.doi.org/10.436/msa.013.41a00 7 Performance of Cement for Immobilizing Strontium
More informationMitigation of expansive Alkali Silica Reaction with Microfibers
Mitigation of expansive Alkali Silica Reaction with Microfibers C.P. Ostertag & CK. Yi University of California, Berkeley, CA, USA ABSTRACT: Alkali silica reaction (ASR) generates expansive forces that
More informationExtraction of Free Magnesia from Steelmaking Slags Using Iodine Ethanol Solutions
ISIJ International, Vol. 58 (2018), ISIJ International, No. 8 Vol. 58 (2018), No. 8, pp. 1474 1479 Extraction of Free Magnesia from Steelmaking Slags Using Iodine Ethanol Solutions Nobuo UEHARA* and Masatoshi
More informationLeaching of CUB Using a CSTX
2005 World of Coal Ash (WOCA), April 11-15, 2005, Lexington, Kentucky, USA http://www.flyash.info Leaching of CUB Using a CSTX Candace Kairies, Carol Cardone, and Karl Schroeder U.S. Dept. of Energy, NETL,
More informationSupporting Information
Supporting Information Iron-Anode Enhanced Sand Filter for Arsenic Removal from Tube Well Water Shiwei Xie, Songhu Yuan, *, Peng Liao, Man Tong,, Yiqun Gan,, Yanxin Wang, State Key Lab of Biogeology and
More informationREMOVAL OF MANGANESE FROM ACID MINE DRAINAGE
REMOVAL OF MANGANESE FROM ACID MINE DRAINAGE I. INTRODUCTION Raymond J. Lovett Department of Chemistry West Virginia University Morgantown, WV 26506 Manganese is a common component of both neutral and
More informationScience-Based Risk Assessment and Wellbores and in a CO 2 Storage System
Science-Based Risk Assessment and Wellbores and in a CO 2 Storage System Wellbores Factors in CCS Operations Placement of CO 2 economic (number of wellbores needed; maintenance, P&A, etc.) Potential release
More informationLECTURE NO. 7 & 8 SETTING OF CEMENT AND MICROSTRUCTURE OF HYDRATED CEMENT PASTE
LECTURE NO. 7 & 8 SETTING OF CEMENT AND MICROSTRUCTURE OF Objectives: To explain the setting of a cement To explain the factors affecting setting of cement To explain the properties of the major hydration
More informationAsbestos case studies 1: Water pipes made of asbestos cement. Erzsébet Tóth (Eötvös L. University, Budapest)
Asbestos case studies 1: Water pipes made of asbestos cement Erzsébet Tóth (Eötvös L. University, Budapest) 31. 08. 2007 Asbestos-cement water pipe production: Selyp (Hungary, 2000) Final products Raw
More informationTexas Hazardous Waste Research Center. In-situ Remediation of Hydrocarbon Contaminated Groundwater Using Polymeric Nanoparticles
TO: FROM: SUBJECT: Texas Hazardous Waste Research Center Gretchen Miller Texas A&M University (979) 862-2581 gmiller@civil.tamu.edu Annual Progress Report PROJECT NUMBER: 513TAM0031H PROJECT TITLE: In-situ
More informationSupporting Information
Supporting Information Poly(carboxylate ether)-based superplasticizer achieves workability retention in calcium aluminate cement Omid Akhlaghi, Yusuf Ziya Menceloglu, and Ozge Akbulut* Figure S1. Representative
More informationConcrete without calcium or silica
Concrete without calcium or silica P A Claisse and E Ganjian Coventry University M Tyrer and A Atkinson Imperial College of Science Technology & Medicine ABSTRACT A new cementitious material with no calcium
More informationIsolation of Protein
Isolation of Protein Ultra-centrifugation http://irfanchemist.wordpress.com/2009/04/19/isolation-of-protein / Protein solutions of various masses or densities may separated based on the time it takes to
More informationMICROSTRUCTURE OF LONG TERM MARINE IMMERGED ANTI-WASHOUT CONCRETE
MICROSTRUCTURE OF LONG TERM MARINE IMMERGED ANTI-WASHOUT CONCRETE Shaowei Yang and Hengjing Ba School of Civil Engineering, Harbin Institute of Technology, Harbin, China Abstract In this contribution,
More information1. Scaling. H.O.: H-5/21, KRISHNA NAGAR, DELHI Tel.: , Fax:
Boiler Water Problems and Its Causes Water is the essential medium for steam generation. Conditioning it properly can increase the efficiency of boiler and as well as extend the boiler s life. Treating
More informationNumerical Simulation of the Early Age Three-Dimensional Microstructure Development of Cement Pastes
4 th International Conference on the Durability of Concrete Structures 24 26 July 214 Purdue University, West Lafayette, IN, USA Numerical Simulation of the Early Age Three-Dimensional Microstructure Development
More informationINVESTIGATION ON SURFACE AND SUBSURFACE FLUID MIGRATION: ENVIRONMENTAL IMPACT
Proceedings of the 13 th International Conference on Environmental Science and Technology Athens, Greece, 5-7 September 2013 INVESTIGATION ON SURFACE AND SUBSURFACE FLUID MIGRATION: ENVIRONMENTAL IMPACT
More informationEFFECTS OF POZZOLANIC REACTION ON THE EVOLUTION OF COARSE CAPILLARY PORE STRUCTURE AND PHASE CONSTITUTION IN CEMENT PASTES WITH MINERAL ADMIXTURES
EFFECTS OF POZZOLANIC REACTION ON THE EVOLUTION OF COARSE CAPILLARY PORE STRUCTURE AND PHASE CONSTITUTION IN CEMENT PASTES WITH MINERAL ADMIXTURES S. Igarashi and A. Watanabe Department of Civil and Environmental
More informationEffect of Nano-Clay on The Mechanical Properties of Fresh and Hardened Cement Mortar Comparing with Nano-Silica
Effect of Nano-Clay on The Mechanical Properties of Fresh and Hardened Cement Mortar Comparing with Nano-Silica 1 Prof.Dr. Sayed Abd El-Baky 2 Dr. Sameh Yehia 3 Dr. Enas A. Khattab 4 Ibrahim S. Khalil
More informationALKALI-SILICA REACTION (ASR)
High Reactivity Metakaolin Engineered Mineral Admixture for Use with Portland Cement Advanced Cement Technologies PowerPozz (a High-Reactivity Metakaolin) is a manufactured pozzolanic mineral admixture
More informationUse of Calcium-Based Products to Stabilize Ponded Coal Ash Techniques and Results. Chemical Lime Company, 3700 Hulen Street, Ft. Worth, Texas 76107
2009 World of Coal Ash (WOCA) Conference - May 4-7, 2009 in Lexington, KY, USA http://www.flyash.info/ Use of Calcium-Based Products to Stabilize Ponded Coal Ash Techniques and Results Eric Berger, P.E.
More informationInfluence of Lime Particle Size on Ph Modification of Gold Ores
International OPEN ACCESS Journal Of Modern Engineering Research (IJMER) Influence of Lime Particle Size on Ph Modification of Gold Ores W. K. Buah 1 and S. A. Ndur 2 Minerals Engineering Department, University
More informationInvestigation of ex situ carbon mineralization using flue gas
Investigation of ex situ carbon mineralization using flue gas Hariharan Subrahmaniam (MIT), Mischa Repmann (First Climate), Johannes Tiefenthaler, Marco Mazzotti Webinar on Geologic Capture and Sequestration
More informationDevelopment and Application of BwrCrud to Long Term Evaluation of Activity Transport in BWRs
Development and Application of BwrCrud to Long Term Evaluation of Activity Transport in BWRs K. Kobayashi, K. Lundgren 2, C. Bergström 2, K. Iida, Y. Iwasaki, K. Chikamoto 3, M. Nishi 3 Tokyo Electric
More information3/7/ Basic Types of Rocks. A Brief Review of Physics
A Brief Review of Physics Energy is the capacity to do work. Work is equal to the product of the net force applied to a fluid and the distance through which the force moves: W = F l W is work [M 2 T -2
More informationEFFECT OF INITIAL SOLUTION ph ON SOLUBILITY AND MORPHOLOGY OF STRUVITE CRYSTALS
EFFECT OF INITIAL SOLUTION ph ON SOLUBILITY AND MORPHOLOGY OF STRUVITE CRYSTALS E. Ariyanto 1, H. M. Ang 1, and T. K. Sen 1 1 Department of Chemical Engineering, Curtin University of Technology GPO BOX
More informationPrinciples of Gel Filtration Chromatography
Edvo-Kit #108 Principles of Gel Filtration Chromatography Experiment Objective: The objective of this experiment is to introduce the principles of gel fi ltration chromatography as a method that separates
More informationThermogravimetric Thin Aqueous Film Corrosion Studies of Alloy 22; Calcium Chloride Solutions at 150 C and Atmospheric Pressure
Thermogravimetric Thin Aqueous Film Corrosion Studies of Alloy 22; Calcium Chloride Solutions at 150 C and Atmospheric Pressure Phillip Hailey and Greg Gdowski Lawrence Livermore National Laboratory Livermore,
More informationEnhanced in Situ Leaching (EISLEACH) Mining by Means of Supercritical Carbon Dioxide - TOUGHREACT Modeling
An Interdisciplinary Response to Mine Water Challenges - Sui, Sun & Wang (eds) 2014 China University of Mining and Technology Press, Xuzhou, ISBN 978-7-5646-2437-8 Enhanced in Situ Leaching (EISLEACH)
More informationImpact of Sludge Towards Stabilization of the Fire Road Mine
Impact of Sludge Towards Stabilization of the Fire Road Mine + M. Coleman 1, K.D.Phinney 2 + 1 NB Power 2 Consulting Chemist./Chemical Engineer Mine Location Background Mined 1982-1985; 25 acre site (1
More informationDevelopment of Durian Fiber-based Composite Material
Development of Durian Fiber-based Composite Material Sarocha Charoenvai 1 *, Joseph Khedari 2,Jongjit Hirunlabh 3 and Chanakan Asasutjarit 4 1 Department of Mechanical Engineering, Faculty of Engineering,
More informationLecture 20: Groundwater Introduction
Lecture 20: Groundwater Introduction Key Questions for Groundwater 1. What is an aquifer? 2. What is an unconfined aquifer? 3. What is groundwater recharge? 4. What is porosity? What determines the magnitude
More informationSucceed at Removing Metals and Other Contaminants from Water
Succeed at Removing Metals and Other Contaminants from Water The MAR Systems Vision Cleaner Water to Benefit the World s Present and Future Generations What We Do Manufacturer of comprehensive adsorbent
More informationDeposition of Silica Aluminum Using an Alkali Solution of Fly Ash
2016 International Conference on Materials, Information, Mechanical, Electronic and Computer Engineering (MIMECE 2016) ISBN: 978-1-60595-420-2 Deposition of Silica Aluminum Using an Alkali Solution of
More informationLECTURE NO. 10 & 11 (Part II) MINERAL ADMIXTURES
Objectives: LECTURE NO. 10 & 11 (Part II) MINERAL ADMIXTURES To introduce the mineral admixtures By: Dr. Shamshad Ahmad To explain in detail fly ash and silica fume used as mineral admixtures INTRODUCTION
More informationPARTIAL REPLACEMENT OF CEMENT IN CONCRETE WITH SUGAR CANE BAGASSE ASH- BEHAVIOUR IN HCl SOLUTION
http:// PARTIAL REPLACEMENT OF CEMENT IN CONCRETE WITH SUGAR CANE BAGASSE ASH- BEHAVIOUR IN HCl SOLUTION ABSTRACT K Meeravali 1, K V G D Balaji 2, T. Santhosh Kumar 3 1 PG Student, 2 Professor, 3 Assistant
More informationFlue Gas Desulfurization by Limestone and Hydrated Lime Slurries
Flue Gas Desulfurization by Limestone and Hydrated Lime Slurries Ayşe Özyuğuran*, Ayşegül Ersoy-Meriçboyu Chemical and Metallurgical Engineering Faculty, Istanbul Technical University, 34469 Maslak-Istanbul-Turkey
More informationSupplementary Figure 1 TEM of external salt byproducts. TEM image of some salt byproducts precipitated out separately from the Si network, with
Supplementary Figure 1 TEM of external salt byproducts. TEM image of some salt byproducts precipitated out separately from the Si network, with non-uniform particle size distribution. The scale bar is
More informationSeeing is Believing. - Nanostructure of Anodic Alumina Film - The International Hard Anodizing Association 15th Technical Symposium
Seeing is Believing - Nanostructure of Anodic Alumina Film - The International Hard Anodizing Association 15th Technical Symposium September 24-26, 2014 Sheraton Lincoln Harbor Hotel, Weehawken, NJ Sachiko
More informationSilica Deposits Can Be Controlled
GRC Transactions, Vol. 40, 2016 Silica Deposits Can Be Controlled Oleh, PhD PowerChem / ChemTreat, Reno Tech Center oleh@powerchemtech.com Keywords Silica, geothermal brine, scale control, ph modification,
More informationUtilization of Alumina Waste and Silica Waste for Geopolymer Production
Article Utilization of Alumina Waste and Silica Waste for Geopolymer Production Petchporn Chawakitchareon *, and Plengprapkun Kingthong Department of Environmental Engineering, Faculty of Engineering,
More informationDeterioration of Asbestos-Cement Pipes
Deterioration of Asbestos-Cement Pipes Thulasi Sathiyaseelan Professor Yinong Liu School of Mechanical Engineering Esther Loh CEED Client: Water Corporation Abstract Asbestos cement (AC) pipes make up
More information