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Ocean Science Journal

, Volume 41, Issue 4, pp 221–226 | Cite as

Decolorization of dyeing wastewater with use of chitosan materials

  • Chen Xin
  • Sun Hui-li
  • Pan Jia-hui
Article

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. Key words - Carboxymethyl chitosan, PAM, Dyeing wastewater, Decolorization, Chitosan/rare-earth membrane

Keywords

Chitosan Chemical Oxygen Demand Flocculation Complex Membrane Chemical Oxygen Demand Reduction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Korea Ocean Research and Development Institute(KORDI) and the Korean Society of Oceanography(KSO) 2006

Authors and Affiliations

  • Chen Xin
    • 1
    • 2
    • 3
  • Sun Hui-li
    • 1
    • 2
  • Pan Jia-hui
    • 3
  1. 1.South China Sea Institute of OceanlogyThe Chinese Academy of ScienceGuangzhouChina
  2. 2.Graduate University of Chinese Academy of ScienceBeijingChina
  3. 3.Department of Chemistry and Chemical EngineeringFoshan UniversityFoshanChina

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