REMEDIATION PERFORMANCE OF REAL AND ARTIFICIAL SOIL CONTAMINATED BY HEAVY METALS WITH VERTICAL ELECTROKINETIC TECHNOLOGY

MA Qiang; WU Qi-tang; FENG Zhi-gang; TANG Zhen-ping; XIE Yan-shi; LONG Xin-xian; CHEN Yi-duo; XU Jia-cheng; SUN Yan

doi:10.13205/j.hjgc.202101028

Volume 39 Issue 1

Apr. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(1): 181-186

MA Qiang, WU Qi-tang, FENG Zhi-gang, TANG Zhen-ping, XIE Yan-shi, LONG Xin-xian, CHEN Yi-duo, XU Jia-cheng, SUN Yan. REMEDIATION PERFORMANCE OF REAL AND ARTIFICIAL SOIL CONTAMINATED BY HEAVY METALS WITH VERTICAL ELECTROKINETIC TECHNOLOGY[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(1): 181-186. doi: 10.13205/j.hjgc.202101028

Citation:

MA Qiang, WU Qi-tang, FENG Zhi-gang, TANG Zhen-ping, XIE Yan-shi, LONG Xin-xian, CHEN Yi-duo, XU Jia-cheng, SUN Yan. REMEDIATION PERFORMANCE OF REAL AND ARTIFICIAL SOIL CONTAMINATED BY HEAVY METALS WITH VERTICAL ELECTROKINETIC TECHNOLOGY[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(1): 181-186. doi: 10.13205/j.hjgc.202101028

Citation:

MA Qiang, WU Qi-tang, FENG Zhi-gang, TANG Zhen-ping, XIE Yan-shi, LONG Xin-xian, CHEN Yi-duo, XU Jia-cheng, SUN Yan. REMEDIATION PERFORMANCE OF REAL AND ARTIFICIAL SOIL CONTAMINATED BY HEAVY METALS WITH VERTICAL ELECTROKINETIC TECHNOLOGY[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(1): 181-186. doi: 10.13205/j.hjgc.202101028

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REMEDIATION PERFORMANCE OF REAL AND ARTIFICIAL SOIL CONTAMINATED BY HEAVY METALS WITH VERTICAL ELECTROKINETIC TECHNOLOGY

doi: 10.13205/j.hjgc.202101028

1. Hunan Key Laboratory of Rare Metal Minerals Exploitation and Geological Disposal of Wastes, University of South China, Hengyang 421001, China;
2. Key Laboratory of Soil Environment and Waste Reuse in Agricultural of Guangdong High Education Institutes, South China Agricultural University, Guanzhou 510642, China;
3. Guangdong Institute of Eco-environment Science & Technology, Guanzhou 510650, China

Received Date: 2019-11-28
Available Online: 2021-04-23

Abstract

Abstract

In order to understand the theory of electrokinetic remediation (EKR) and provide scientific basis for the remediation of the contaminated sites, the vertical electrokinetic remediation technology was used to the real and artificial contaminated soil and compared the current intensity, pH and heavy metal translocation between the two types of soil. The main experimental results could be listed as follows:1) During the process of EKR, the real and artificial contaminated soil had similar current peak shape, but the current value of artificial soil was about twice of that of the real soil, indicating that the artificial soil contained more mobile ions than the real soil. 2) After the EKR, the real and artificial contaminated soil had similar pH changing trend:the soil pH near the anode was lowered, but the soil pH near the cathode was increased. The increase of the cathode pH could fix the heavy metals in deep layers of soil. 3) For the real soil, the vertical EKR removed Cd, Pb, Cu and Zn from 0~5 cm to deeper layers, and similarly from 5~10 cm soil layer for Cd and Zn, but Pb and Cu accumulated in the 5~10 cm soil layer, and the other soil layer did not change significantly. 4) For the artificial soil, Cd migrated obviously and accumulated at the deepest layer (35~40 cm). Zn and Cu were removed from the 0~20 cm layer, but Pb was only removed from the 0~5 cm layer. The other soil layers did not significantly change. 5) The real soil had a significantly lower heavy metals translocation rates than the artificial soil, probably due to the heavy metals in artificial soil had shorter aging time (for 2 months), and Cd and Zn had a high mobility. Therefore, the experimental results obtained from artificial soil might not be able to be applied to the actually contaminated soil.
- artificial contaminated soil,
- real contaminated soil,
- heavy metals,
- electrokinetic remediation,
- translocation rate

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