Application of Supramolecular Strategy to the Removal of Coordinated Metal From Wastewater
Two poly-dithiocarboxy-group ligand compound， disodium N,N”-bis-(dithiocarboxy)piperazine（BDP) and sodium 1,3,5-hexahydrotriazinedithiocarbamate(HTDC)was pre-pared. It was found that they could remove free and stable complexcopper(Ⅱ) and ni-ckel(Ⅱ) from both synthetic and actual industrial wastewaterwastewaters by the formation of supramolecular precipitants For example，at 1:1stoichiometric of BDP/Cu an-d BDP/Ni，the free Cu 2+and Ni 2+concentration could bereduced from initial 50.00mg/Lto 0.04 mg/L and 0.10 mg/L，respectively，and 10％excess BDP of stoichiometric dose-s were enough for CuEDTA and nickel citratewastewaters to reach the first-grade emi-ssion standard of integrated wastewaterdischarge standard. BDP could be applied in the range of pH≥4 for free and complexcopper wastewaters and pH≥7 for nickel wastewaters. And ”CuBDP”n precipitatespossessed favorable settling performances and hardl-y leached at weak acidic andalkaline conditions. BDP CS precipitant is more effecti-ve than commercial smallmolecular precipitant DDTC in treating metal wastewaters.
废水处理 配合物 超分子策略
Fenglian Fu Shuxian Jiang Chun He Ya Xiong
School of Environmental Science and Engineering, Zhongshan University,Guangzhou, 510275,P. R. China
国内会议
大连
英文
342
2008-11-05（万方平台首次上网日期，不代表论文的发表时间）