Ocean Science Journal

The Korean Society of Oceanography (한국해양학회)
권호 표지

Decolorization of Dyeing Wastewater with Use of Chitosan Materials

  • Xin, Chen (South China Sea Institute of Oceanlogy, The Chinese Academy of Science) ;
  • Sun, Hui-Li (South China Sea Institute of Oceanlogy, The Chinese Academy of Science) ;
  • Pan, Jia-Hui (Department of Chemistry and Chemical Engineering, Foshan University)
  • Published : 2006.12.31
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Abstract

More attention has been paid to the research on decolorization of dyeing wastewater nowadays. In this study, an investigation into the decolorization of dyeing wastewater was conducted using a combination of coagulant, carboxymethyl chitosan (NOCC) and coagulant aid, polyscrylamide (PAM). The factors influencing the decolorization efficiency, such as pH value, coagulant and the dosages of coagulant, were discussed. The results showed that using PAM as coagulant aid could reach a high decolorization efficiency compared with using NOCC alone. The optimal conditions were pH 2.3, 480 mg/L for NOCC, and 4-8 mg/L for PAM. Under the optimum conditions, the rate of decolorization could achieve 99%, and the removal of chemical oxygen demand (COD) could achieve 90%. In addition, the membrane processes with chitosan/rare-earth-metals could enhance the decolorization rate of Direct Black FF to 94.7%, and Indanthren Red F3B to 98.2%, respectively.

Keywords

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