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Effect of soil type on heavy metals removal in bioelectrochemical system.
Bioelectrochemistry. 2020 Dec; 136:107596.B

Abstract

Microbial fuel cell (MFC) technology is widely used to remediate heavy metal pollution of soil, and the applicability of soils with different physical and chemical properties under micro-electric field has not been studied. In this study, copper was effectively removed in four typical soil-filled MFCs. The removal efficiencies of copper from closed-circuit MFCs filled with paddy, red, black and alluvial soils were 2.9, 1.50, 3.48 and 3.40 times higher than those in the open-circuit control group, respectively. However, the contributions of electromigration and diffusion mechanisms were different under different soil types. The greatest copper removal (19.3 ± 0.8%) was achieved based on electromigration of the electric field inside the paddy soil MFC in 63 days, while the greatest copper removal (25 ± 2%) was achieved under the action of diffusion mechanism inside the red soil MFC. According to redundancy analysis, the removal of copper by electromigration was positively correlated with electricity generation performance and acid extractable Cu content, whereas copper removal based on diffusion was positively related to soil pore volume and acid extractable Cu content. The cation exchange capacity and total organic carbon of soil were negatively correlated with the acid extractable Cu content, and electrical conductivity of soil was positively correlated with the MFC electricity generation performance. Furthermore, the directional movement of protons under an electric field alleviated the issue of soil acidification caused by citric acid.

Authors+Show Affiliations

School of Energy and Environment, Southeast University, Nanjing 210096, China. Electronic address: zhangjingran1993@163.com.School of Energy and Environment, Southeast University, Nanjing 210096, China. Electronic address: liuyanqingseu@163.com.School of Energy and Environment, Southeast University, Nanjing 210096, China. Electronic address: 2741709967@qq.com.School of Municipal Engineering, Xi'an University of Technology, Xi'an 710048, China; School of Energy and Environment, Southeast University, Nanjing 210096, China. Electronic address: wanghui306@xaut.edu.cn.Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Aoba Aramaki 6-6-06, Sendai 980-8579, Japan; School of Energy and Environment, Southeast University, Nanjing 210096, China. Electronic address: c_caoxian@163.com.School of Energy and Environment, Southeast University, Nanjing 210096, China. Electronic address: lxnseu@163.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32679338

Citation

Zhang, Jingran, et al. "Effect of Soil Type On Heavy Metals Removal in Bioelectrochemical System." Bioelectrochemistry (Amsterdam, Netherlands), vol. 136, 2020, p. 107596.
Zhang J, Liu Y, Sun Y, et al. Effect of soil type on heavy metals removal in bioelectrochemical system. Bioelectrochemistry. 2020;136:107596.
Zhang, J., Liu, Y., Sun, Y., Wang, H., Cao, X., & Li, X. (2020). Effect of soil type on heavy metals removal in bioelectrochemical system. Bioelectrochemistry (Amsterdam, Netherlands), 136, 107596. https://doi.org/10.1016/j.bioelechem.2020.107596
Zhang J, et al. Effect of Soil Type On Heavy Metals Removal in Bioelectrochemical System. Bioelectrochemistry. 2020;136:107596. PubMed PMID: 32679338.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of soil type on heavy metals removal in bioelectrochemical system. AU - Zhang,Jingran, AU - Liu,Yanqing, AU - Sun,Yilun, AU - Wang,Hui, AU - Cao,Xian, AU - Li,Xianning, Y1 - 2020/07/08/ PY - 2020/04/24/received PY - 2020/07/02/revised PY - 2020/07/02/accepted PY - 2020/7/18/pubmed PY - 2021/5/4/medline PY - 2020/7/18/entrez KW - Copper KW - Diffusion KW - Microbial fuel cell KW - Migration KW - Soil type SP - 107596 EP - 107596 JF - Bioelectrochemistry (Amsterdam, Netherlands) JO - Bioelectrochemistry VL - 136 N2 - Microbial fuel cell (MFC) technology is widely used to remediate heavy metal pollution of soil, and the applicability of soils with different physical and chemical properties under micro-electric field has not been studied. In this study, copper was effectively removed in four typical soil-filled MFCs. The removal efficiencies of copper from closed-circuit MFCs filled with paddy, red, black and alluvial soils were 2.9, 1.50, 3.48 and 3.40 times higher than those in the open-circuit control group, respectively. However, the contributions of electromigration and diffusion mechanisms were different under different soil types. The greatest copper removal (19.3 ± 0.8%) was achieved based on electromigration of the electric field inside the paddy soil MFC in 63 days, while the greatest copper removal (25 ± 2%) was achieved under the action of diffusion mechanism inside the red soil MFC. According to redundancy analysis, the removal of copper by electromigration was positively correlated with electricity generation performance and acid extractable Cu content, whereas copper removal based on diffusion was positively related to soil pore volume and acid extractable Cu content. The cation exchange capacity and total organic carbon of soil were negatively correlated with the acid extractable Cu content, and electrical conductivity of soil was positively correlated with the MFC electricity generation performance. Furthermore, the directional movement of protons under an electric field alleviated the issue of soil acidification caused by citric acid. SN - 1878-562X UR - https://www.unboundmedicine.com/medline/citation/32679338/Effect_of_soil_type_on_heavy_metals_removal_in_bioelectrochemical_system_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1567-5394(20)30266-8 DB - PRIME DP - Unbound Medicine ER -