Evaluation of Acid 4092 Dye Solution Toxicity After UV/ZnO Mediated Nanophotocatalysis Process Using Daphnia Magna Bioassay

Transcription

1 available (39) 5 / 492 UV/ZnO : : : : 4 39 / 2 / 2 : 9 / 2 / 3 : 89 / 9 / 28 : UV/ZnO ph UV/ZnO. 9,55,6 24,9 LC596 hr, LC572 hr LC524 hr UV/ZnO : Evaluation of Acid 492 Dye Solution Toxicity After UV/ZnO Mediated Nanophotocatalysis Process Using Daphnia Magna Bioassay M. H. Dehghani*, S. Nasseri, P. Mahdavi, A. H. Mahvi, K. Naddafi, Gh. R. Jahed Department of Environmental Health Engineering, School of Public Health, Institute for Environmental researches, Tehran University of Medical Sciences, P.O.Box: , Tehran, Iran Received: 422 Accepted: 352 Available online: 322 The Acid 492 dye solution toxicity after UV/ZnO mediated nanophotocatalysis process using Daphnia magna bioassay was investigated. Daphnia magna has been evaluated as suitable indicator to test effluent toxicity in dyes wastewater. In this study, the parameters such as ZnO nanoparticles load, ph and contact time were analyzed. This study showed that toxicity increases during the UV/ZnO nanophotocatalysis process. Besides, toxicity increases with time. LC524 hr, LC572 hr, and LC596 hr values were 24.9,.6, and 9.55 mg/l, respectively. J. Color Sci. Tech. 5(22), Institute for Color Science and Technology. Keywords: Toxicity, Nanophotocatalysis, UV/ZnO, Daphnia magna, Acid 492 dye, Bioassay. *Corresponding author: hdehghani@sina.tums.ac.ir

2 286.. [62]...[2226]..[4 2226] 492 UV/ZnO Acid 492 Wool Black... 66,46. C 22 H 4 N 6 Na 2 O 9 S 2. %99,8 5 Kg/m 3 4 5m 2 /gr. 6 2 nm 3...[]....[5]. ZnO. (3,2 ev). ZnO.. 45 nm UV.[2 5].. Journal of Color Science and Technology(22) (39)

3 mg/l Acid 492 ( ph= ZnO ).. % % ) Acid ) ( ( ,5 LC 5 72 hr Probit (Perkin Elmer Lambada 25 UV/vis). (phmeter E 25) ph.[28] [4 27] 2 ± 2,5, C 2 2 C ( ) ).(,5. 2,5 (phmeter E 25 ) ph 2. (IkAwerke) ) Hettichrpm (Universal... Journal of Color Science and Technology(22) (39)

4 ; V/V (%) Acid492 :2 LC5 (mg/l) LC 5 96 hr y = 4.483x x x R 2 = Exposure time (hr) :3 LC 5. LC 5 96 hr , Acid 492 TU LC LC TU 8,6 mg/l 2,5 mg/l..,84.,84,82 96,82 LC UV/ZnO 2 2 ZnO =, gr/l). (ph = ; V/V (%) Acid 492 :.LC 5 72 hr 96hr 2 2.( = ) : 72hr 48 hr 24hr 6hr 4hr 2 hr (%) Journal of Color Science and Technology(22) (39)

5 ( 72 ) :2 (%),E,9,,,,, 2,,, 3,,, 4,7,, 5,53,5,5 6,32,3,3 7,47,42,42 8,4944,56,494 9,3387,339,339 3,3E 3,36E 3,36E.( 96) :3 (%),9,,,35,4,4 2,6,2,2 3,345,34,34 4,98,92,92 5,298,22,22 6,4739,526,474 7,9225,77,923 8,6273,373, ,2622,62 2,67 2,2,,. : ( ) ,6 2,5 LC 5 (mg/l)(*) 3, LC 5 (mg/l) ( %95 ) 99,6 LC 5 (mg/l)( %95 ),84,82 TU(**) *Lethal concentration % 5 **Toxicity unit Journal of Color Science and Technology(22) (39)

6 ; V/V (%) :5.LC 5 48 hr UV/ZnO ; V/V (%) :6.LC 5 72 hr UV/ZnO ) ( ,9 LC 5 24 hr 72. (5 ),6 (4 ) LC5 6 LC5 72 hr.(6 ) LC5 48 hr 24 hr (7 ) 96 LC 5 9,55 LC 5 96 hr. LC 5 72 hr LC 5 48 hr 24 hr 5. UV/ZnO LC 5 96 hr LC5 TU ; ; V/V (%) : 7.LC 5 96 hr UV/ZnO V/V (%) :4.LC 5 24hr UV/ZnO Journal of Color Science and Technology(22) (39)

7 UV/ZnO : ( ) ,55 29,9 75,2 6 56,3 88,3,6 73,9 93,6 24,9 33,5, LC 5 (mg/l) LC 5 (mg/l)( %95 ) LC 5 (mg/l)( %95 ),,94,9,8 TU % 5.[5].[2 26] TU LC 5. UV/ZnO.. ZnO. ZnO LC5 LC % % LC 5. 8,6 mg/l 2,5 mg/l,84,82 LC 5 96 hr TU96hr TU72hr 72 hr UV/ZnO LC 5 96 hr LC 5 72 hr LC 5 48 hr LC 5 24 hr 6,6 24,9 TU 9,55.,,94,9,8 UV/ZnO..[226] 25 5 Journal of Color Science and Technology(22) (39)

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