SCI和EI收录∣中国化工学会会刊

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. 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. 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: 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