JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2019, Vol. 43 ›› Issue (01): 154-160.doi: 10.3969/j.issn.1000-2006.201807011

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Review on combined electrokinetic and phytoremediation technology for soil contaminated by heavy metal

WEI Shuhe1, XU Lei1, 2, HAN Ran 1,2, DOU Xuekai 1,2, YANG Wei 1,2   

  1. 1.Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100039, China
  • Online:2019-01-28 Published:2019-01-28

Abstract: Electrokinetic remediation of soil is an efficient in situ remediation technology. In this article, the effects of electric fields such as voltage application, electric field intensity, additives and other factors on heavy metal accumulation in plants are reviewed. Most researches showed that choosing appropriate electric field configurations and intensities can improve the availability of heavy metals in soil, thereby promoting their uptake by plants and to some certain increasing plant biomass. In general, the selection of AC or low intensity DC electric fields can improve the bioavailability of heavy metals and also help to avoid the negative effects of electric fields on plants. Future research should focus on examining the mechanism of combined remediation by hyperaccumulators and electric fields, develop key methods of plant remediation such as high efficiency and low cost environmentally-friendly strengthening reagents, and create coupled electrokinetic remediation and phytoremediation technology for one or more heavy metal contaminated soils.

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