Effects of Electric Field on Migration and Removal of Cd2+ in Sediment of High Moisture Content

doi:10.11988/ckyyb.20210960

Journal of Yangtze River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (2): 60-66.DOI: 10.11988/ckyyb.20210960

• WATER ENVIRONMENT AND WATER ECOLOGY • Previous Articles Next Articles

Effects of Electric Field on Migration and Removal of Cd²⁺ in Sediment of High Moisture Content

LIU Ye^1,2, WANG Cun-shi^1,2, WU Shao-kai³, SHEN Wen-tao⁴, XU Jian-bo⁵, BAI Wang-jun⁶, ZHU Jian-zhong^1,2

1. College of Environment, Hohai University, Nanjing 210089, China;
2. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, Hohai University, Nanjing 210089, China;
3. The Second Engineering Company of CCCC Fourth Harbor Engineering Co., Ltd., Guangzhou 510230, China;
4. State Grid Jiangsu Electric Power Engineering Consulting Co., Ltd., Nanjing 210036, China;
5. China First Metallurgical Group Co., Ltd., Wuhan 430081, China;
6. Hohai University Design Institute Co., Ltd., Nanjing 210098, China

Received:2021-09-08 Revised:2021-11-23 Online:2023-02-01 Published:2023-03-07

Abstract

Abstract: The aim of this research is to verify the effectiveness of electrokinetic remediation technology in removing heavy metal pollution. The adsorption characteristics and the diffusion and migration of Cd²⁺ in sediments under electric field were studied by using the low-pressure DC sediment disturbance simulation device. Results manifested that the saturated adsorption of Cd²⁺ by silt under electric field increased from 0.438 mg/g to 0.498 mg/g. XRD analysis of sediment confirmed that the change of mineral crystal led to the decrease of Zeta potential and the enhancement of adsorption capacity. The migration of Cd²⁺ to solid phase and electrode network increased at 30 V voltage, and the Cd²⁺ atom content in cathode electrode network increased from 0.05% to 0.19% mainly due to the electrocoagulation of Cd²⁺ in liquid phase. In addition, the adsorption and electrochemical reaction of Cd²⁺ can be accelerated under the condition of disturbance.

Key words: sediment adsorption, electric field, heavy metal pollution, migration, electrochemical reaction

CLC Number:

X522

LIU Ye, WANG Cun-shi, WU Shao-kai, SHEN Wen-tao, XU Jian-bo, BAI Wang-jun, ZHU Jian-zhong. Effects of Electric Field on Migration and Removal of Cd²⁺ in Sediment of High Moisture Content[J]. Journal of Yangtze River Scientific Research Institute, 2023, 40(2): 60-66.

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Effects of Electric Field on Migration and Removal of Cd²⁺ in Sediment of High Moisture Content

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