摘要
提出了一种低浓度重金属离子溶液的快速富集净化处理方法。目标金属离子首先络合为负离子,在正电压牵引下,金属络合离子到达离子膜表面,在膜表面阴离子层吸引下通过阳离子交换膜,并在受体溶液中再次络合为阴离子络合物,在电场作用下向阳极区移动。富集电流为1.5mA,汞离子、镉离子的富集时间分别为20,60min,水样中汞离子、镉离子的富集倍数分别为10.5,3.2倍。本方法避免了液膜稳定性缺陷。
Rapid enrichment and purification method for low concentration metal ions in solution was proposed. The target metal ions formed coordinated complex with anion first. Under the positive voltage traction, metal complexing ions reached the surface of the ion-exchange membrane and passed through cation exchange membrane under the attraction of anionic membrane layer. It formed anionic complex again in receptor solution and moved to the anode zone in the electric field. Enrichment current found was 1.5 mA. Enrichment times of Hg2＋ , Cd2＋ found were 20, 60 rain respectively. Enrichment facors of Hg2＋ , Cd2＋ in water sample found were 10.5, 3.2 times, respectively. This method avoided the defect of liquid membrane stability.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2015年第5期605-608,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
浙江省质量技术监督局科研计划项目(20110230)
关键词
重金属离子
络合
离子交换膜
水
Heavy metal ions
Complexation
Ion exchange membrane
Water
作者简介
费贤明（1967-），男，浙江嘉兴人，高级工程师，研究方向为食品检测技术。E-mail：fxm7211@163．com
