Selective uptake of caesium by mordenite enclosing AMP microcapsules

Transcription

1 Selective uptake of caesium by mordenite enclosing AMP microcapsules Abstract ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN , OECD

2 Introduction Figure 1: Schematic diagram of AMP-M composites AMP Cs + lcium alginate gel polymer Macropores of mordenite Experimental Materials and preparation procedure of AMP-M composites 2 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN , OECD 2012

3 Surface morphology and structure of AMP-M composites Determination of distribution coefficient Column test Results and discussion Surface morphology and structure of AMP-M composites ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN , OECD

4 Figure 2: Apparatus for column experiments Tubing pump P Circulation pump P Column Fraction Collector Water Thermocontroller Feed Figure 3: SEM images of (a) (b) Magnification image 500 m 50 m Figure 4: Mapping of Cs, Mo and P in AMP-M3 4 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN , OECD 2012

5 Uptake [%] Intensity [a.u.] Figure 5: XRD pattern of adsorbents :AMP AMP-M3 AMP-M2 Mordenite 2 [deg] Table 1: Lattice constants (Å) of AMP crystals in AMP-M AMP-M2 AMP-M3 Original fine crystals of AMP Uptake rate of Cs + for AMP-M composites Figure 6: Uptake rate of Cs + V/m = 100 cm 3 /g; 251C AMP-M3 AMP-M2 Mordenite Time [h] ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN , OECD

6 K d [cm 3 g -1 ] K d [cm 3 g -1 ] Effect of HNO 3 concentration on K d of Cs + for AMP-M composites Figure 7: Effects of HNO 3 concentration on K d,cs V/m = 100 cm 3 /g; [Cs + ]: 10 ppm; 251C AMP-M3 AMP-M2 Mordenite HNO 3 [M] Figure 8: K d of different metal ions for V/m = 100 cm 3 /g; [M n+ ]: 10 ppm; 251C Cs Rb Ag HNO 3 [M] 6 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN , OECD 2012

7 C eq /Q eq [g/dm 3 ] Q eq [mmol/g] Uptake isotherm of Cs + for AMP-M composites Figure 9: Uptake isotherm of Cs + on V/m = 100 cm 3 /g; 251C C eq [mmol/dm 3 ] Figure 10: Langmuir-plot C eq [mmol/dm 3 ] ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN , OECD

8 Table 2: Q max values of adsorbents Adsorbent Mordenite AMP-M2 AMP-M3 Q max [mmol/g] Breakthrough and elution properties of Cs + through column Figure 11: Breakthrough and elution curves of Cs + for column Column: 0.5 cm 20 cm, : 2 g; flow rate: 0.22 cm 3 /min; 251C (a) Feed solution [Cs + ] = ppm; (b) loaded amount of Cs + : 0.34 mmol; eluent: 5 M NH 4NO 3 (a) Breakthrough curve (b) Elution curve C/C 0 Eluted [%] Effluent volume [cm 3 ] Elution volume [cm 3 ] Conclusions 8 ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN , OECD 2012

9 References ACTINIDE AND FISSION PRODUCT PARTITIONING AND TRANSMUTATION, ISBN , OECD