【摘要】 采用重金属捕集剂二硫代氨基甲酸盐(DTCR-2)深度处理低浓度矿山废水中Cu2+、Zn2+、Pb2+、Cd2+、Cr3+等多种混合重金属离子,研究了pH值、DTCR-2添加量、搅拌时间、反应时间、温度以及絮凝剂等因素对处理效果的影响。实验结果表明:调节废水pH值为8左右,投加φ(DTCR-2)=1%的DTCR-2溶液1.2 mL,室温下搅拌5min再添加适量联合絮凝剂,总反应15 min后,各重金属离子去除率均达到96%以上,出水中所考察的重金属离子质量浓度均远低于国家排放标准。更多还原

【Abstract】 DTCR-2,as a kind of heavy metal capturing agent,is used to deeply remove heavy metals such as Cu2+,Zn2+,Pb2+,Cd2+ and Cr3+ in low-concentration mine wastewater,and the influence factors of operating conditions,such as pH value,capturing agent dosage,stirring time,reaction time,temperature and flocculent,are researched.Experiment results showed that when the pH value of wastewater was adjusted to about 8,adding 1.2 mL of DTCR-2 solution,which the volume fraction of DTCR-2 was 1%,then stirring 5 minutes under room temperature and adding appropriate amount of flocculants,the removal efficiency rate of each kind of heavy metal was higher than 96% after total reacting 15 minutes.The concentration of investigated heavy metals was far below the standards of national emission.更多还原