文献类型： 外文期刊

第一作者： Li Tielong

作者： Li Tielong;Zhang Na;Jin Zhaohui;Qi Xinhua;Geng Bing

作者机构：

期刊名称：8TH CHINA INTERNATIONAL NANOSCIENCE AND TECHNOLOGY SYMPOSIUM (CINSTS09)

ISSN： 1742-6588

年卷期： 2009 年 188 卷

页码：

收录情况： SCI

摘要： Chitosan-Fe-0 nanoparticles (chitosan-Fe-0) were prepared using nontoxic and biodegradable chitosan as a stabilizer. Laboratory batch and column experiments were conducted to investigate the feasibility of using chitosan-Fe-0 for in situ reductive removal of Cr(VI) from water. Batch kinetic tests indicated that the overall disappearance of Cr(VI) may include both physical adsorption of Cr(VI) onto the chitosan-Fe0 surface and subsequent reduction of Cr(VI) to C(III). The rate of reduction of Cr(VI) to Cr(III) can be expressed by a pseudo-first-order reaction kinetics and the rate constants increase with the increase in iron loading. Column experiments indicated that the chitosan-Fe-0 were highly deliverable in the column. When the column was treated with Cr(VI)-contaminated deionized water, the removal capacity of chitosan-Fe-0 was found to be about 32 mg Cr/g Fe(0). A 25% drop in the Cr(VI) removal capacity was found when treated with Cr(VI)-contaminated surface water.

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