Zhou Huihua, Zheng Jianjun, Wang Hui, Wang Jianxin, Song Xiaoguang, Cao Yanmei, Fang Lei, Feng Yuping, Xiong Chunhua
Institute of Environmental Protection Design and Research, Zhejiang Gongshang University, Hangzhou 310012, China and Institute of Zhejiang Environmental Protection Design & Research Co., Ltd, Hangzhou 310012, China.
Department of Applied Chemistry, Zhejiang Gongshang University, Hangzhou 310012, China E-mail:
Water Sci Technol. 2017 Oct;76(7-8):1915-1924. doi: 10.2166/wst.2017.292.
With an efficient methodology, a novel chloromethylated polystyrene-g-2-mercapto-1,3,4-thiadiazole chelating resin (MTR resin) was prepared via a one-step reaction. The structure of MTR resin was characterized by elements analysis, Fourier transform infrared spectroscopy, thermogravimetric analysis, and scanning electron microscopy. Meanwhile, the adsorption properties of the resin for Hg(II) were investigated by batch and column experiments. The results showed that the resin possessed much better adsorption capability for Hg(II) than for other metal ions. The statically and the dynamic saturated adsorption capacities were 343.8 mg/g and 475.1 mg/g. The adsorption kinetic and equilibrium data were well fitted to the second-order model and the Langmuir isotherm model, respectively. Desorption of mercury from the resin can be achieved using 30 mL of 2 mol/L HCl-5% thiourea solution with a desorption ratio of 92.3%. Compared with other absorbents, MTR resin was greatly conserve natural resources and reduce the cost.
采用一种高效方法，通过一步反应制备了一种新型的氯甲基化聚苯乙烯-g-2-巯基-1,3,4-噻二唑螯合树脂（MTR树脂）。通过元素分析、傅里叶变换红外光谱、热重分析和扫描电子显微镜对MTR树脂的结构进行了表征。同时，通过分批和柱实验研究了该树脂对Hg(II)的吸附性能。结果表明，该树脂对Hg(II)的吸附能力远优于其他金属离子。静态和动态饱和吸附容量分别为343.8 mg/g和475.1 mg/g。吸附动力学和平衡数据分别很好地符合二级模型和朗缪尔等温线模型。使用30 mL 2 mol/L HCl-5%硫脲溶液可实现树脂上汞的解吸，解吸率为92.3%。与其他吸附剂相比，MTR树脂极大地节约了自然资源并降低了成本。
