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Decolorization of Dyeing Wastewater Using Chitosan Materials

Xin Chen, Sun Hui-li, Pan Jia-hui

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Abstract

The investigation on decolorization of dyeing wastewater was conducted using a combination of coagulant,carboxymethyl chitosan(NOCC)and coagulant aid,polyscrylamide(PAM).Factors influencing the decolorization efficiency including pH value,coagulant and dosage of coagulant were discussed.Results showed that using PAM as coagulant aid could result in a high decolorization efficiency comparing with that using NOCC alone.Under the optimal conditions of pH 2.3,480mg/L for NOCC and 4～8mg/L for PAM,the rate of decolorization could achieve 99% and removal of COD 90%.The membrane process with chitosan/rare-earth metals could enhance decolorization rate of Direct Black FF to 94.7%,and Indanthrene Red F3B to 98.2% respectively.

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What this paper is about

The investigation on decolorization of dyeing wastewater was conducted using a combination of coagulant,carboxymethyl chitosan(NOCC)and coagulant aid,polyscrylamide(PAM).Factors influencing the decolorization efficiency including pH value,coagulant and dosage of coagulant were discussed.Results showed that using PAM as coagulant aid could result in a high decolorization efficiency comparing with that using NOCC alone.Under the optimal conditions of pH 2.3,480mg/L for NOCC and 4～8mg/L for PAM,the rate of decolorization could achieve 99% and removal of COD 90%.The membrane process with chitosan/rare-earth metals could enhance decolorization rate of Direct Black FF to 94.7%,and Indanthrene Red F3B to 98.2% respectively.

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Available abstract

The investigation on decolorization of dyeing wastewater was conducted using a combination of coagulant,carboxymethyl chitosan(NOCC)and coagulant aid,polyscrylamide(PAM).Factors influencing the decolorization efficiency including pH value,coagulant and dosage of coagulant were discussed.Results showed that using PAM as coagulant aid could result in a high decolorization efficiency comparing with that using NOCC alone.Under the optimal conditions of pH 2.3,480mg/L for NOCC and 4～8mg/L for PAM,the rate of decolorization could achieve 99% and removal of COD 90%.The membrane process with chitosan/rare-earth metals could enhance decolorization rate of Direct Black FF to 94.7%,and Indanthrene Red F3B to 98.2% respectively.

Key concepts: Chitosan, Dyeing, Chemistry, Wastewater, Pulp and paper industry, Nuclear chemistry, Chromatography, Environmental engineering

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