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首页> 外文期刊>Journal of Applied Polymer Science >Adsorption of hexavalent chromium by chitosan-based polymeric surfactants
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Adsorption of hexavalent chromium by chitosan-based polymeric surfactants

机译：壳聚糖基聚合物表面活性剂吸附六价铬

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Chitosan-based polymeric surfactants (CBPSs) were prepared by the partial N-acylation of amine groups on chitosan with acid anhydrides. To apply the CBPSs for the removal of Cr(VI) commonly found in wastewater, a batch test was conducted to evaluate the adsorption capacity. The removal efficiency of Cr(VI) by the CBPS depended on several factors, including the solution pH, CBPS dose, and ionic strength. Our results show that the CBPSs exhibited a greater adsorption capacity for Cr(VI) than have other modified chitosans reported in the literature. The maximum adsorption capacity of Cr(VI) was 180 mg/g of CBPS at a final pH of 5.3. From the results of dynamic light scattering, we propose that the removal mechanism of Cr(VI) by the CBPSs was mainly through the adsorption of negatively charged chrorniurn ions by positively charged amine groups on the CBPSs followed by colloidal precipitation because of its lower solubility. Conclusively, we found that the CBPS was significantly effective for the removal of Cr(VI). (C) 2005 Wiley Periodicals, Inc.
机译：壳聚糖基聚合物表面活性剂（CBPS）是通过用酸酐将壳聚糖上的胺基部分N-酰化制备的。为了应用CBPS去除废水中常见的Cr（VI），进行了分批测试以评估吸附能力。 CBPS去除Cr（VI）的效率取决于几个因素，包括溶液的pH值，CBPS剂量和离子强度。我们的结果表明，CBPS与其他文献报道的改性壳聚糖相比，对Cr（VI）的吸附能力更高。在最终pH值为5.3时，Cr（VI）的最大吸附容量为180 mg / g CBPS。从动态光散射的结果来看，我们认为CBPS去除Cr（VI）的机理主要是由于CBPS上带正电荷的胺基吸附带负电荷的氯离子，然后由于其溶解度较低而发生胶体沉淀。最终，我们发现CBPS可以有效去除Cr（VI）。 （C）2005 Wiley期刊公司

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