Use of solar cell in electrokinetic remediation of cadmium-contaminated soil

作者：Yuan Songhu; Zheng Zhonghua; Chen Jing; Lu Xiaohua^*

来源：Journal of Hazardous Materials, 2009, 162(2-3): 1583-1587.

DOI：10.1016/j.jhazmat.2008.06.038

• Solar cell
• Soil remediation
• Electrokinetic
• Heavy metals

This preliminary study used a solar cell, instead of direct current (DC) power supply, to generate electric field for electrokinetic (EK) remediation of cadmium-contaminated soil. Three EK tests were conducted and compared; one was conducted on a cloudy and rainy day with solar cell, one was conducted on a sunny day with solar cell and another was conducted periodically with DC power supply. It was found that the output potential of solar cell depended on daytime and was influenced by weather conditions; the applied potential in soil was affected by the output potential and weather conditions, and the current achieved by solar cell was comparable with that achieved by DC power supply. Solar cell could be used to drive the electromigration of cadmium in contaminated soil, and removal efficiency achieved by solar cell was comparable with that achieved by DC power supply. Compared with traditional DC power supply, using solar cell as power supply for EK remediation can greatly reduce energy expenditure. This study provided an alternative to improve the EK soil remediation and expanded the use of solar cell in environmental remediation.

• 出版日期2009-3-15
• 单位华中科技大学