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APPLICATION OF CHITOSAN IONICALLY CROSSLINKED WITH SODIUM EDETATE FOR REACTIVE DYES REMOVAL FROM AQUEOUS SOLUTIONS

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Jóźwiak T., Filipkowska U., Szymczyk P., Kuczajowska-Zadrożna M., Mielcarek A.

Progress on Chemistry and Application of Chitin and its Derivatives

2015

vol. 20

82-96

In this study, we investigated the effect of chitosan crosslinking with sodium edetate (SE) on its sorption capacity of Reactive Black 5 and Reactive Yellow 84 dyes. The first stage of the study allowed establishing conditions of chitosan crosslinking. The process of ionic crosslinking was effective only at pH 4 and at the optimal dose of sodium edetate ranging from 0.046 to 0.462 g/g CHs. Process temperature in the range of 20-60oC had no significant effect on the stability of crosslinked chitosan. Contrary to the non-crosslinked chitosan (CHs), chitosan crosslinked with sodium edetate (CHs-SE) was capable of dyes sorption at pH 3. Sorption of reactive onto both CHs and CHs-SE was the most effective at pH 4. Chitosan crosslinking with SE had a positive effect on the effectiveness of RB5 and RY84 sorption. This effect was especially tangible within the first ten or so hours of sorption. After 24 h of the process, the sorption capacity of CHs-SE against RB5 and RY84 reached 1296.69 mg/g and 1883.62 mg/g, respectively. In the case of CHs, sorption capacity achieved after the same time was lower and accounted for 1025.55 mg RB5/g and 1539.67 mg RY84/g.

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1 Progress on Chemistry and Application of Chitin and its Derivatives

1 2015

1 Filipkowska U.

1 Jóźwiak T.

1 Kuczajowska-Zadrożna M.

1 Mielcarek A.

1 Szymczyk P.

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APPLICATION OF CHITOSAN IONICALLY CROSSLINKED WITH SODIUM EDETATE FOR REACTIVE DYES REMOVAL FROM AQUEOUS SOLUTIONS