摘要
以市售的胺类化合物、二硫化碳、氢氧化钠等为原料,使用有机混合溶剂作为反应介质,合成了一种重金属螯合剂(CACS-1),对其合成条件进行讨论,并应用于处理自由铜、自由铅、络合铜以及铜、铅、镉混合废水。结果表明,该螯合剂不仅能去除自由铜、铅,还能去除络合铜。对共存铜、铅、镉混合废水对铜沉淀的速度稍快于铅和镉,但均能处理达标。
A new heavy metal chelating agent(CACS-1) was synthesized using amine, carbon disulfide,sodium hydroxide as raw materials, and mixed organic solvents as reaction medium. The synthesis conditions were discussed. The CACS-1 was applied for treating wastewater containing free Cu2+, free Pb2+,and mixed Cu2+, Pb2+, Cd2+, respectively. Results showed that chelating agent removed not only free Cu2+, free Pb2+,but also chelating Cu2+ and Pb2+. The removal speed of Cu2+ was faster than that of Pb2+ and Cd2+ in mixed wastewater, however, the treated wastewater could meet discharge standard.
引文
[1]H.Wang,Y.-F.Yu,Q.-W.Chen,K.Cheng,Dalton Transactions 40(2011)559-563.
[2]尚小琴,罗楠,梁敏华,杨素改,谢国仁,化工进展29(2010)1010-1014.
[3]M.M.Matlock,K.R.Henke,D.A.Atwood,Journal of hazardous materials 92(2002)129-142.
[4]F.Fu,R.Chen,Y.Xiong,Separation and Purification Technology 52(2006)388-393.
[5]T.Saegusa,S.Kobayashi,K.Hayashi,A.Yamada,Polym.J 10(1978)403.