布基三明治状纳米复合材料同时移除工业废水中Cr(VI)和Cd(II)的作用机理研究

针对如何同时移除工业废水中电性相反的六价铬（Cr(VI)）和二价镉（Cd(II)），且方便回收这一重要课题，本项目将FeS和羧基化Fe3O4（CFFM）两种纳米颗粒分别沉积到两张废弃纯棉布表面，并将其面对面组合制备一种柔韧且便于回收的布基三明治状纳米复合材料（FeS/CFFM/CF）。本项目拟建立基于FeS/CFFM/CF的工业废水中Cr(VI)和Cd(II)的同时移除方法；通过常规手段探究CF、FeS、CFFM和FeS/CFFM/CF与Cr(VI)和Cd(II)的吸附和还原脱毒机制；利用电子自旋共振波谱仪和X射线吸收精细结构谱仪等表征手段阐明Cr和Cd赋存状态的变化规律。本研究拟揭示FeS/CFFM/CF同时移除Cr(VI)和Cd(II)的关键机理，为修复Cr(VI)和Cd(II)复合污染提供理论和数据支撑。

How to realize the simultaneous removal of the oppositely charged hexavalent chromium (Cr(VI)) and bivalent cadmium (Cd(II)) in the industrial wastewater, and the easy separation after removal are important issues. In this project, ferrous sulfide (FeS) and carboxyl-functionalized ferroferric oxide microsphere (CFFM) are deposited on the surface of the waste cotton fabrics, and then a flexible and easy to separate cloth-based sandwich-like nanocomposite (FeS/CFFM/CF) is synthesized via face-to-face combination of these two pieces of cotton fabrics. In this project, the simultaneous removal method of FeS/CFFM/CF for Cr(VI) and Cd(II) will be established. The mechanisms of adsorption and reduction detoxification between CF, FeS, CFFM, FeS/CFFM/CF and Cr(VI), Cd(II) will be studied through traditional methods. The changing process of Cr and Cd state is uncovered by electron spin resonance spectrometer, X-ray absorption fine structure, and other characterization methods. This study will reveal the simultaneous removal mechanism of FeS/CFFM/CF for Cr(VI) and Cd(II), and provide theory and data support for remediation of Cr(VI) and Cd(II) combined pollutant.