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 ex...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 is60%smaller than that of EKG,whereas the average anode contact resistance of EKG is56%smaller than that of iron.The values of the power consumption per unit mass of contaminants for EKG and iron are1.895and1.989kJ/g,respectively.After electro-osmosis,the number of soil pores increased,but the average area decreased,with an average area of0.9100–1.0504μm^2.Based on microstructure analysis,we obtained higher electroosmotic efficiency and realized the effective analysis and utilization between macroscopic and microscopic parameters.展开更多
基金Project(51378469)supported by the National Natural Science Foundation of ChinaProject(2017C33034)supported by the Application Research of Public Welfare Technology in Zhejiang Province,China+1 种基金Project(LQ18E080001)supported by the Zhejiang Provincial Natural Science Foundation,ChinaProject(12017A610304)supported by the Natural Science Foundation of Ningbo City,China
文摘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 is60%smaller than that of EKG,whereas the average anode contact resistance of EKG is56%smaller than that of iron.The values of the power consumption per unit mass of contaminants for EKG and iron are1.895and1.989kJ/g,respectively.After electro-osmosis,the number of soil pores increased,but the average area decreased,with an average area of0.9100–1.0504μm^2.Based on microstructure analysis,we obtained higher electroosmotic efficiency and realized the effective analysis and utilization between macroscopic and microscopic parameters.
