摘要
利用五乙烯六胺和CS2为主要原料合成了一种多硫代氨基甲酸盐类重金属捕集剂PDTC,并将其应用于化学镀镍废水的处理,考察了 PDTC投加量、搅拌反应时间、废水pH值、聚合氯化铝投加量等因素对PDTC处理含Ni2+、Zn2+废水效果的影响,并与市售重金属捕集剂TMT-15进行对比实验.结果表明,在PDTC投加量为240mg·L-1、pH值为8、反应时间为80s、聚合氯化铝投加量为120mg·L-1的条件下,处理后废水中残留Ni2+和Zn2+浓度分别为0.09g·L-1和0.76mg·L-1,均满足广东省地方标准DB44/T 1597-2015电镀水污染物排放标准要求,且在相同实验条件下,相比于TMT-15,PDTC对Ni2+、Zn2+具有更好的去除效果.
Abstract
The heavy metal chelating agent PDTC was synthesized by using N1,N1'-(ethane-1,2-diyl)bis(N2-(2-aMinoethyl)ethane-1,2-diaMine)and carbon disulfide as the main raw materials,and applied to the treatment of electroless nickel plating wastewater.The influences of the PDTC dosage,stirring reaction time,pH of the wastewater and the dosage of polymerized alumina chloride on the effect of the treatment of Ni2+and Zn2+wastewater were investigated,and a comparative study was carried out with the commercially available heavy metal chelating agent TMT-15.The experimental results showed that,when the dosage of PDTC was 240mg·L-1,pH value was 8.0,reaction time was 80s,and dosage of polymerized aluminum chloride was 120mg·L-1,the residual Ni2+and Zn2+concentrations in the wastewater were 0.09mg·L-1 and 0.76mg·L-1,respectively,which met the emission limits of electroplating water pollutants of the local standard of Guangdong Province(DB44/T 1597-2015),and under the same experimental conditions,compared with TMT-15,PDTC has a better removal effect on Ni2+and Zn2+.
基金项目
深圳市科技研发资金(KCXFZ20230731093259010)
维普
万方数据