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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 12    December 2018

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Comparative experiments on electro-osmotic treatment effect of polluted soil using EKG and iron electrodes
ZANG Jun-chao(臧俊超)1, 2, ZHENG Ling-wei(郑凌逶)1, 2, XIE Xin-yu(谢新宇)1, 2, WANG Heng-yu(王恒宇)2, LIU Yi-min(刘亦民)1, 2, PANG Jie(庞杰)1, 2

1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University,Hangzhou 310058, China;
2. Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China

Abstract:This study presents a comprehensive comparison of the electro-osmosis treatments of heavy metal contaminated soil using electrokinetic geosynthetics (EKG) and iron electrodes in terms of both theoretical analysis and experimental research. The variation in the electrical parameters was analyzed, and the results show linear relationships between temperature and conductivity and between the soil and pore water conductivities. The average cathode contact resistance of iron is 60% smaller than that of EKG, whereas the average anode contact resistance of EKG is 56% smaller than that of iron. The values of the power consumption per unit mass of contaminants for EKG and iron are 1.895 and 1.989 kJ/g, respectively. After electro-osmosis, the number of soil pores increased, but the average area decreased, with an average area of 0.9100–1.0504 μm2. Based on microstructure analysis, we obtained higher electroosmotic efficiency and realized the effective analysis and utilization between macroscopic and microscopic parameters.

 

Key words: EKG; contaminated soil; electrical conductivity; ion transport; microstructure

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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