Adsorption of acid fuchsin onto the chitosan–montmorillonite composite |
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| Authors: | Chun-Yan Cao Tian Zhang Qiao Cong |
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| Institution: | 1. College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Liaoning, Jinzhou, Chinacaochunyan_04@163.com;3. College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Liaoning, Jinzhou, China |
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| Abstract: | The chitosan–montmorillonite composites (CTS–MMT) were prepared by CTS in combination with Na-type montmorillonite (Na-MMT). The composites were characterized by X-ray diffraction and Fourier transform infrared spectroscopy. The effects of initial pH value of the solution, adsorbent dose, the mass ratio of CTS to Na-MMT, the adsorption temperature, and contact time on acid fuchsin (AF) removal efficiency were investigated. The results indicated that the CTS could be successfully intercalated into the interlayers of Na-MMT. With the increase in content of CTS, some of them may be distributed on the surfaces of the clay and the AF removal efficiency can reach 80.2% using CTS–MMT as adsorbent to treatment AF wastewater (the AF concentration 20?mg/L) under the condition of pH, 5; adsorbent dose, 5?g/L; the mass ratio of CTS to Na-MMT, 0.25:1; adsorption temperature, 40°C; and contact time, 90?min. Meanwhile, it was shown that the adsorption processes were better fitted by pseudo-second-order model and the Freundlich model. |
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| Keywords: | Acid fuchsin chitosan dyeing wastewater montmorillonite removal efficiency |
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