聚乙烯亚胺辅助超滤法处理含锶含钴废水

摘要

研究了聚乙烯亚胺(PEI)辅助超滤处理含重金属离子锶(Sr2+)和钴(Co2+)的废水.重点考察了PEI与重金属离子的质量浓度比(P/M),溶液pH以及离子强度对Sr2+和Co2+截留率的影响.结果显示PEI去除Sr2+和Co2+的最适pH为5和9,去除两种金属离子的最佳P/M值均为10.在最佳P/M值和最适pH时,对锶和钴的截留率分别为59％和100％.试验结果表明使用PEI辅助可以大大提高超滤膜对重金属废水中Sr2+和Co2+(尤其是Co2+)的去除效率.%Polyethyleneimine (PEI) was used in polymer enhanced ultrafiltration to remove strontium ion (Si2*) and cobalt ion (Co2*) from industrial wastewater. Effects of concentration ratio of polymer and metal ion, pH and ionic strength on Sr2* and Co2* removal were investigated. Optimum pH values on Sr2* and Co2* removal are 5 and 9, respectively; optimum P/M values are 10 for both metals. Under optimum conditions, removal rates of Sr2* and Co2* are 59 % and 100 %, respectively. The results show that PEI enhanced ultrafiltration can effectively increase the removal rates of Sr2* and Co2* (especially Co2*) from industrial wastewater.