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Comparative study of remediation of Cr(VI)-contaminated soil using electrokinetics combined with bioremediation

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Abstract

The purpose of this research is to design a new bioremediation-electrokinetic (Bio-EK) remediation process to increase treatment efficiency of chromium contamination in soil. Upon residual chromium analysis, it is shown that traditional electrokinetic-PRB system (control) does not have high efficiency (80.26%) to remove Cr(VI). Bio-electrokinetics of exogenous add with reduction bacteria Microbacterium sp. Y2 and electrokinetics can enhance treatment efficiency Cr(VI) to 90.67% after 8 days’ remediation. To optimize the overall performance, integrated bio-electrokinetics were designed by synergy with 200 g humic substances (HS) into the systems. According to our results, Cr(VI) (98.33%) was effectively removed via electrokinetics. Moreover, bacteria and humic substances are natural, sustainable, and economical enhancement agents. The research results indicated that the use of integrated bio-electrokinetics is an effective method to remediate chromium-contaminated soils.

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Funding

This project is financially supported by the National key R&D Program of China (2016YFA06010000).

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Authors and Affiliations

  1. School of Environmental and Chemical Engineering, Shanghai University, No. 99 Shangda Rd, Shanghai, 200444, People’s Republic of China

    Jiaying He, Chiquan He, Xueping Chen, Xia Liang, Tongli Huang, Xuecheng Yang & Hai Shang

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  1. Jiaying He
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  2. Chiquan He
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  3. Xueping Chen
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  4. Xia Liang
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  5. Tongli Huang
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  6. Xuecheng Yang
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  7. Hai Shang
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Correspondence to Chiquan He.

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Responsible editor: Bingcai Pan

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He, J., He, C., Chen, X. et al. Comparative study of remediation of Cr(VI)-contaminated soil using electrokinetics combined with bioremediation. Environ Sci Pollut Res 25, 17682–17689 (2018). https://doi.org/10.1007/s11356-018-1741-8

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  • DOI: https://doi.org/10.1007/s11356-018-1741-8

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