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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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82-96
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- Department of Environmental Engineering, University of Warmia and Mazury in Olsztyn ul Warszawska 117t,10–719 Olsztyn, Poland
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- Department of Environmental Engineering, University of Warmia and Mazury in Olsztyn ul Warszawska 117t,10–719 Olsztyn, Poland, urszula.filipkowska@uwm.edu.pl
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- Department of Environmental Engineering, University of Warmia and Mazury in Olsztyn ul Warszawska 117t,10–719 Olsztyn, Poland
- Department of Biotechnology in Environmental Protection, University of Warmia and Mazury in Olsztyn ul. Słoneczna 45Gt,10–709Olsztyn, Poland
author
- Department of Environmental Engineering, University of Warmia and Mazury in Olsztyn ul Warszawska 117t,10–719 Olsztyn, Poland
References
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bwmeta1.element.psjd-54d2e9a4-fa3a-4651-b15c-41d50deb3716