Navarro Ronald R, Wada Shinji, Tatsumi Kenji
Department of Chemical Engineering, College of Engineering and Agro-Industrial Technology, University of the Philippines, Los Banos College, Laguna 4031, Philippines.
J Hazard Mater. 2005 Aug 31;123(1-3):203-9. doi: 10.1016/j.jhazmat.2005.03.048.
The removal of various heavy metal ions such as Cu2+, Co2+, Zn2+, Ni2+ and Pb2+ from aqueous solutions by precipitation with polyelectrolyte complex of PPEI and PEI was conducted. Heavy metal binding with PPEI was initially allowed to occur and then upon equilibration, PEI was added to initiate precipitation of the polyelectrolyte complex together with the heavy metal ion. The PPEI-PEI system was found effective for heavy metal scavenging purposes even in the presence of high concentrations of non-transition metal ions like Na+. Heavy metal concentration may be reduced beyond emission standards for industrial wastewaters. The PPEI-PEI polyelectrolyte complex was found to be more effective than traditional precipitation methods for the treatment of a representative electroless Ni plating waste solution.
通过用PPEI和PEI的聚电解质络合物沉淀法从水溶液中去除各种重金属离子，如Cu2+、Co2+、Zn2+、Ni2+和Pb2+。首先使重金属与PPEI结合，然后在达到平衡后，加入PEI以引发聚电解质络合物与重金属离子一起沉淀。发现即使在存在高浓度非过渡金属离子如Na+的情况下，PPEI-PEI体系对于重金属清除目的也是有效的。重金属浓度可以降低到工业废水排放标准以下。发现PPEI-PEI聚电解质络合物在处理代表性的化学镀镍废水溶液方面比传统沉淀方法更有效。
