Electrochemical analysis of ion-exchange membranes with respect to a possible use in electrodialytic decontamination of soil polluted with heavy metals

被引：20

作者：

Hansen, HK ^{[1
]}

Ottosen, LM ^{[1
]}

Laursen, S ^{[1
]}

Villumsen, A ^{[1
]}

机构：

[1] TECH UNIV DENMARK, DEPT GEOL & GEOTECH ENGN, DK-2800 LYNGBY, DENMARK

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 1997年 / 32卷 / 15期

关键词：

ion-exchange membranes; electrodialysis; transport numbers; desalting; heavy metals; soil decontamination;

D O I：

10.1080/01496399708000778

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Transport numbers in different metal chloride solutions were estimated using the emf method for two ion-exchange membranes: Ionics CR67 HMR412 (cation-exchange membrane) and Ionics AR204 SXRA 7639 (anion-exchange membrane). The cation-exchange membrane was found to work nearly ideally for NaCl and CaCl2 solutions even at high concentrations, whereas deviation from ideality was seen for ZnCl2 and CuCl2 solutions. The anion-exchange membrane showed transport numbers for the anion around 0.95 for NaCl, CaCl2 and ZnCl2 solutions for the concentration range investigated. Electrodialytic desalting experiments taken as a simplified simulation of the electrokinetic decontamination method showed that it was possible to remove all ions in the simulated soil volume, with a sharp increase in the potential difference over the soil volume as a result, and that it was possible to control the metal content in the different solutions in the electrodialytic decontamination method.

引用

页码：2425 / 2444

页数：20

共 23 条

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