磁性膨润土的制备及其对Cr(VI)的吸附处理
Preparation and characterization of magnetic bentonite and their applications for the removal of Cr(VI)
针对目前污水处理药剂成本较高、制备工艺繁杂、处理效果较差，使得净化水难达到排放标准的缺陷，采用改良后的溶剂热法制备出新型的Fe3O4磁性膨润土复合吸附剂(Fe3O4-壳聚糖/膨润土)。通过XRD、FTIR、SEM、TEM、TG-DTA等表征分析说明Fe3O4-壳聚糖/膨润土被成功制备，且缔合氢键为其拥有稳定结构提供了化学支撑。同时将其应用于重金属Cr(VI)的吸附处理中，考察了吸附剂用量、溶液浓度、吸附反应温度、pH 值等因素对吸附过程的影响规律。结果表明：在吸附剂对Cr(VI)的吸附处理中，酸性及高温条件更有利于吸附效率与吸附量的提升；且吸附过程遵循准二级吸附动力学。
Fe3O4-chitosan/bentonite (Fe3O4-CS/MMT) was synthesized via a modified solvothermal method. The composite adsorbent were characterized by XRD、FTIR、SEM、TEM、DT-TGA and then tested as adsorbents for the removal of Cr(VI). The Fe3O4-CS/MMT possessed of a stable structure due to the presence of hydrogen-bonding bewteen Fe3O4-CS and bentonite. Under the optimized conditions, the Fe3O4-CS/MMT Cr(VI) removal efficiency and adsorption capacity were 99.19% and 54.26 mg/g, respectively. The temperature and pH of solution are key factors for the adsorption and the adsorption kinetics followed a pseudo-second order equation.
乔晨、马清亮、申迎华、章青芳、马建超、肖宇强
环境污染、环境污染防治化学工业经济无机化学工业
材料化学膨润土Fe3O4壳聚糖r(VI)吸附动力学
materials chemistrybentoniteFe3O4chitosanCr (VI)adsorption kinetics
乔晨,马清亮,申迎华,章青芳,马建超,肖宇强.磁性膨润土的制备及其对Cr(VI)的吸附处理[EB/OL].(2016-04-18)[2025-08-02].http://www.paper.edu.cn/releasepaper/content/201604-220.点此复制
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