• 关键词：重金属捕集剂  重金属  螯合  间苯二甲酰氯  巯基乙胺

• 基金项目：国家自然科学基金项目(No.41101287);江苏省环保科研课题项目(No.201107);江苏高校优势学科建设工程资助项目

• 王风贺
• 南京师范大学环境科学与工程系,南京 210046

• 王君杰
• 南京理工大学工业化学研究所,南京 210094

• 雷武
• 南京理工大学工业化学研究所,南京 210094

• 夏明珠
• 南京理工大学工业化学研究所,南京 210094

• 王风云
• 南京理工大学工业化学研究所,南京 210094

• 摘要：以间苯二甲酰氯(IPC)和巯基乙胺盐酸盐(CHC)为原料,采用一步法合成重金属螯合捕集剂N,N'-双(2-巯基乙基)—1,3-苯二甲酰胺(NBMIPA),重点研究了物质的量比(n(CHC):n(IPC))和反应温度对NBMIPA产率的影响,并研究了NBMIPA投加量和pH对Cu²⁺、Zn²⁺捕集性能的影响.结果表明:重金属螯合捕集剂NBMIPA的最佳合成工艺为n(CHC):n(IPC)=2.8、反应温度-5 ℃,此时NBMIPA的最高产率为78.64%;NBMIPA对Cu²⁺和Zn²⁺的捕集性能优良,NBMIPA投加量越大,捕集性能越高;NBMIPA对pH具有较宽的适应性.当NBMIPA投加量分别为45 mL和30 mL时,NBMIPA对Cu²⁺和Zn²⁺的捕集效果最佳,Cu²⁺的去除率达到99.33%,残余Cu²⁺浓度为0.46 mg·L^-1,Zn²⁺的去除率达到97.49%,残余Zn²⁺浓度为1.84 mg·L^-1.

• Abstract：Heavy metal chelating agent of N,N'-bis(2-mercaptoethyl)isophthalamide (NBMIPA) was prepared with isophthaloyl chloride (IPC) and cysteamine hydrochloride (CHC) as raw materials. The effects of mole ratio of reactants (CHC:IPC) and reaction temperature on the yield of the NBMIPA were studied. NBMIPA dosage and pH on the residual concentration and removal rate for wastewater containing Cu²⁺ and Zn²⁺ were investigated. The experimental results showed that the maximum yield of NBMIPA was 78.64%, when the mole ratio of CHC:IPC was 2.8 and reaction temperature was -5 ℃. It was observed that NBMIPA could effectively remove Cu²⁺ and Zn²⁺. The bigger of the NBMIPA dosage was, the higher of the removal rate could be achieved. NBMIPA had wide adaptability on pH. The optimal removal performance of Cu²⁺ can be achieved when the dosage of NBMIPA was 45 mL. The removal rate of Cu²⁺ can reach 99.33% with residual concentration of 0.46 mg·L^-1. In comparison, the optimal removal performance of Zn²⁺ can be achieved when the dosage of NBMIPA was 30 mL. The removal rate of Zn²⁺ can reach 97.49% with residual concentration of 1.84 mg·L^-1.

• Key words：heavy metal chelating agent  heavy metal  chelate  isophthaloyl chloride(IPC)  cysteamine hydrochloride(CHC)

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