Treatment of wastewater containing Cu2+ and Hg2+ with new heavy metal capturing agent NBMIPA
新型重金属捕集剂NBMIPA处理含铜汞废水

In this study, heavy metal capturing agent NBMIPA was synthesized with isophthaloyl chloride and cysteamine hydrochloride as raw materials. The treatment effects of the chelating agent NBMIPA on wastewater containing Cu2+ and Hg2+ were investigated. The result showed that the application properties of NBMIPA for capturing Cu2+ and Hg2+ were very well, the bigger the dosage, the higher the performance. NBMIPA had a wide pH range for applications. The residual dosage of Cu2+ was 0.38 mg/L by directly added NBMIPA that the molar ratio of chelating agent to Cu2+ was 4~5, without adjusting pH, stirring time was 12 minutes, and the removal rate of Cu2+ could reach 99.5%. When the molar ratio of chelating agent to Hg2+ was 4~5, the removal rate of Hg2+ could reach 99.83%, and the residual concentration of Hg2+ was 0.032 mg/L.