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45mL和30mL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0.46mg·L-1,Zn2+的去除率达到97.49%,残余Zn2+浓度为1.84mg·L-1.
Heavy metal chelating agent of N, N＇-bis （2-mercaptoethyl）isophthalamide （NBMIPA） was prepared with isophthaloyl chloride （IPC） and eysteamine hydrochloride （CHC） as raw materials. The effects of mole ratio of reactants （ CHC ： IPC） and reaction temperature on the yield of the NBM1PA 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 CI-IC： IPC was 2.8 and reaction temperature was - 5 ~. It was observed that NBMIPA could effectively remove Cuz ~ 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 ＋ carl 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 ofl.84 mg＇L
出处
《环境科学学报》
CAS
CSCD
北大核心
2013年第1期88-91,共4页
Acta Scientiae Circumstantiae
基金
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~~
关键词
重金属捕集剂
重金属
螯合
间苯二甲酰氯
巯基乙胺
heavy metal chelating agent
heavy metal
chelate
isophthaloyl chloride（!PC）
cysteamine hydrochloride（CHC）
