Fu Fenglian, Zeng Haiyan, Cai Qinhong, Qiu Rongliang, Yu Jimmy, Xiong Ya
School of Environmental Science and Engineering, Zhongshan University, Guangzhou 510275, PR China.
Chemosphere. 2007 Nov;69(11):1783-9. doi: 10.1016/j.chemosphere.2007.05.063. Epub 2007 Jul 12.
A new dithiocarbamate-type heavy metal precipitant, sodium 1,3,5-hexahydrotriazinedithiocarbamate (HTDC), was prepared and used to remove coordinated copper from wastewater. In the reported dithiocarbamate-type precipitants, HTDC possesses the highest percentage of the effective functional groups. It could effectively precipitate copper to less than 0.5mgl(-1) from both synthetic and actual industrial wastewater containing CuEDTA in the range of pH 3-9. UV-vis spectral investigation and elemental analysis suggested that the precipitate was a kind of coordination supramolecular compound, Cu(3)(HTDC)(2). The toxicity characteristic leaching procedure (TCLP) and semi-dynamic leaching test (SDLT) indicated that the supramolecular precipitate was non-hazardous and stable in weak acid and alkaline conditions. Tests of an anion exchange resin D231 provided a clue to simultaneously remove excess HTDC and residual CuEDTA in practical process of wastewater treatment.
制备了一种新型二硫代氨基甲酸盐类重金属沉淀剂1,3,5-六氢三嗪二硫代氨基甲酸钠（HTDC），并用于去除废水中的配位铜。在所报道的二硫代氨基甲酸盐类沉淀剂中，HTDC具有最高比例的有效官能团。它能够有效地将含CuEDTA的模拟和实际工业废水中的铜沉淀至低于0.5mg/L，pH范围为3至9。紫外可见光谱研究和元素分析表明，沉淀物是一种配位超分子化合物[Cu₃(HTDC)₂]ₙ。毒性特性浸出程序（TCLP）和半动态浸出试验（SDLT）表明，该超分子沉淀物在弱酸和碱性条件下无危害且稳定。阴离子交换树脂D231的测试为在实际废水处理过程中同时去除过量的HTDC和残留的CuEDTA提供了线索。
