A new two-dimensional experimental apparatus for electrochemical remediation processes

doi:10.1016/j.cjche.2015.05.011

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (8): 1389-1397.DOI: 10.1016/j.cjche.2015.05.011

• 能源、资源与环境技术 • 上一篇下一篇

A new two-dimensional experimental apparatus for electrochemical remediation processes

Yingying Gu¹, Rongbing Fu², Hongjiang Li³, Hui An¹

1 Department of Environmental & Safety Engineering, China University of Petroleum (East China), Qingdao 266580, China;
2 Shanghai Academy of Environmental Sciences, Shanghai 200233, China;
3 Qingdao Water Group Co. Ltd., Qingdao 266002, China

收稿日期:2014-12-16 修回日期:2015-05-13 出版日期:2015-08-28 发布日期:2015-09-26
通讯作者: Yingying Gu
基金资助:
Supported by the National Natural Science Foundation of China (41201303, 20807028, 41372262), the Fundamental Research for the Central Universities (14CX02052A, 14CX02191A), theQingdao Science and Technology Programfor young scientists (14-2-4-86-jch) and the State Key Laboratory of Pollution Control and Resource Reuse Foundation (PCRRF13023).

A new two-dimensional experimental apparatus for electrochemical remediation processes

Yingying Gu¹, Rongbing Fu², Hongjiang Li³, Hui An¹

1 Department of Environmental & Safety Engineering, China University of Petroleum (East China), Qingdao 266580, China;
2 Shanghai Academy of Environmental Sciences, Shanghai 200233, China;
3 Qingdao Water Group Co. Ltd., Qingdao 266002, China

Received:2014-12-16 Revised:2015-05-13 Online:2015-08-28 Published:2015-09-26
Contact: Yingying Gu
Supported by:
Supported by the National Natural Science Foundation of China (41201303, 20807028, 41372262), the Fundamental Research for the Central Universities (14CX02052A, 14CX02191A), theQingdao Science and Technology Programfor young scientists (14-2-4-86-jch) and the State Key Laboratory of Pollution Control and Resource Reuse Foundation (PCRRF13023).

摘要/Abstract

摘要： Electrochemical extraction of contaminants from soils is a promising soil decontamination technology. Various experiments have been conducted to study electrochemical reactions and geochemical processes in the electrochemical extraction using different experimental apparatuses. This paper presents the development of a new closed two-dimensional (2D) apparatus that can better simulate the field application of the technology and accurately monitor the most important electrochemical parameters to understand the process. The innovative features of the new apparatus include the outer and inner electrodes designed to apply a non-uniform electrical field across the specimen as in the field electrochemical remediation process, the probes installed to measure the 2D distribution of electrical voltage, and the gas and fluid volumemeasurement devices used to accurately monitor the gas generation and electroosmotic flowrates at both electrodes as a function of time. The components of this new apparatus and the features of each component are described. The operating procedure and some typical results from three experimentswith the apparatus are demonstrated. The results showthat the variation of the gas generation rate is in good agreement with the electric current. Their relation provides a valid evaluation for electrochemical behavior of the system and Faraday's laws of electrolysis. The 2D profiles of cadmium concentration and voltage distribution at the end of the experiment reveal the great effects of a non-uniform electrical field on the contaminant mobilization.

关键词: Electrochemical extraction, 2D experimental apparatus, Non-uniform electrical field, Gas generation rate

Abstract: Electrochemical extraction of contaminants from soils is a promising soil decontamination technology. Various experiments have been conducted to study electrochemical reactions and geochemical processes in the electrochemical extraction using different experimental apparatuses. This paper presents the development of a new closed two-dimensional (2D) apparatus that can better simulate the field application of the technology and accurately monitor the most important electrochemical parameters to understand the process. The innovative features of the new apparatus include the outer and inner electrodes designed to apply a non-uniform electrical field across the specimen as in the field electrochemical remediation process, the probes installed to measure the 2D distribution of electrical voltage, and the gas and fluid volumemeasurement devices used to accurately monitor the gas generation and electroosmotic flowrates at both electrodes as a function of time. The components of this new apparatus and the features of each component are described. The operating procedure and some typical results from three experimentswith the apparatus are demonstrated. The results showthat the variation of the gas generation rate is in good agreement with the electric current. Their relation provides a valid evaluation for electrochemical behavior of the system and Faraday's laws of electrolysis. The 2D profiles of cadmium concentration and voltage distribution at the end of the experiment reveal the great effects of a non-uniform electrical field on the contaminant mobilization.

Key words: Electrochemical extraction, 2D experimental apparatus, Non-uniform electrical field, Gas generation rate

Yingying Gu, Rongbing Fu, Hongjiang Li, Hui An. A new two-dimensional experimental apparatus for electrochemical remediation processes[J]. Chinese Journal of Chemical Engineering, 2015, 23(8): 1389-1397.

Yingying Gu, Rongbing Fu, Hongjiang Li, Hui An. A new two-dimensional experimental apparatus for electrochemical remediation processes[J]. Chin.J.Chem.Eng., 2015, 23(8): 1389-1397.

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A new two-dimensional experimental apparatus for electrochemical remediation processes

A new two-dimensional experimental apparatus for electrochemical remediation processes

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