State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, College of Resources and Environment, Institute of Biochemical Engineering & Environmental Technology, Lanzhou University, Lanzhou 730000, PR China.
J Hazard Mater. 2011 Jan 30;185(2-3):1348-54. doi: 10.1016/j.jhazmat.2010.10.054. Epub 2010 Oct 20.
A novel chelating resin containing cyanoguanidine moiety has been successfully prepared by the functionalizing reaction of a macroporous bead based on chloromethylated copolymer of styrene-divinylbenzene (CMPS) with dicyandiamide (DCDA) in the presence of phase transfer catalyst. The Fourier transform-infrared spectra (FT-IR) and scanning electron microscopy (SEM) were employed in the characterization of the resulting chelating resin, meanwhile, the adsorption properties of the resin for Hg(II) were investigated by batch and column methods. The results indicated that the resin displayed a marked advantage in Hg(II) binding capacity, and the saturated adsorption capacity estimated from the Langmuir model was dramatically up to 1077 mg g(-1) at 45 °C. Furthermore, it was found that the resin was able to selectively separate Hg(II) from multicomponent solutions with Zn(II), Cu(II), Pb(II) and Mg(II). The desorption process of Hg(II) was tested with different eluents and the ratio of the highest recovery reached to 96% under eluting condition of 1M HCl+10% thiourea. Consequently, the resulting chelating resin would provide a potential application for treatment process of Hg(II) containing wastewater.
一种新型的含氰基胍部分的螯合树脂，通过在相转移催化剂存在下，用二氰二胺（DCDA）对氯甲基化苯乙烯-二乙烯基苯共聚物（CMPS）大孔珠进行功能化反应成功制备。傅里叶变换红外光谱（FT-IR）和扫描电子显微镜（SEM）用于对所得螯合树脂进行表征，同时通过批量和柱方法研究了树脂对 Hg(II)的吸附性能。结果表明，该树脂在 Hg(II)结合能力方面表现出明显的优势，在 45°C 时，根据 Langmuir 模型估算的饱和吸附容量高达 1077mg g(-1)。此外，还发现该树脂能够从含有 Zn(II)、Cu(II)、Pb(II)和 Mg(II)的多组分溶液中选择性分离 Hg(II)。用不同洗脱剂测试了 Hg(II)的洗脱过程，在 1M HCl+10%硫脲洗脱条件下，最高回收率达到 96%。因此，所得螯合树脂将为含 Hg(II)废水的处理工艺提供潜在的应用。
