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《Journal of Northeast Normal University(Natural Science Edition)》 2011-01
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A study on treatment of hexavalent chromium containing wastewater by reduction-flocculation process

WANG Yang,LIU Miao,LIU Nan,CHEN Song-yue(College of Environment and Resources,Jilin University,Changchun 130012,China)  
Utilize anionic polymers and cationic polymers combine with sodium sulfide(Na2S) and ferrous sulfate(FeSO4) to deal with hexavalent chromium containing wastewater.Na2S and FeSO4 are selected as reductant while gelatin and PAM are used for sedimentation.As to the data analysis,orthogonal experiments are used to design the whole research.Optimal treatment conditions for wastewater containing hexavalent chromium are determined through this process.The Cr6+ removal rate maintained 98.6% and the concentration was 0.28 mg/L when experimental conditions were as follows:inlet concentration of Cr6+ was 20 mg/L,Na2S was 24.70 mg/L,FeSO4 was 25 mg/L,gelatin was 100 mg/L,PAM was 10.0 mg/L,pH was 9.0.
【Fund】: 科技部专项基金资助项目(2009ZX07208-006-001);; 长春市科技发展计划项目(2007KZ15)
【CateGory Index】: X703
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