https://scholars.lib.ntu.edu.tw/handle/123456789/462713
Title: | Wetland plant microbial fuel cells for remediation of hexavalent chromium contaminated soils and electricity production | Authors: | Guan, C.-Y. Tseng, Y.-H. Tsang, D.C.W. Hu, A. CHANG-PING YU |
Keywords: | Chinese pennisetum; Cr(VI); Electricity production; Graphite carbon felt; Plant microbial fuel cell | Issue Date: | 2019 | Journal Volume: | 365 | Start page/Pages: | 137-145 | Source: | Journal of Hazardous Materials | Abstract: | The plant microbial fuel cell (PMFC) is a novel technology which integrates plants, microbes, and electrochemical elements together to create renewable energy. However, information regarding using the PMFC system to remediate metal-contaminated soils is still limited. In this study, we evaluate the potential of PMFC systems to remediate soils polluted by Cr(VI). We compare different plants and different electrode materials with regard to their electricity generation and Cr(VI) removals under different soil Cr(VI) concentrations. In PMFC systems, the soil pH was transformed from slightly acidic to neutral, and the electrical conductivity was reduced during operation. The removal efficiency of Cr(VI) in soils could reach 99%, and the total Cr of soils could also be reduced. The closed circuit voltage of PMFC systems of Chinese pennisetum using the graphite carbon felt as the electrodes could reach the daily average value of 469.21 mV. PMFC systems have successfully demonstrated the ability to remove Cr(VI) from soils collected from actual metal-contaminated sites. Our results suggest that using PMFCs to remediate contaminated soils is promising, and the effects of decontamination are mostly contributed by bioelectrochemical processes and plant uptake. © 2018 Elsevier B.V. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/462713 | DOI: | 10.1016/j.jhazmat.2018.10.086 | SDG/Keyword: | Chromium compounds; Contamination; Electric power generation; Felt; Graphite; Graphite electrodes; Microbial fuel cells; Remediation; Removal; Soil pollution control; Soils; Bioelectrochemical process; Chinese pennisetum; Electricity production; Electrochemical elements; Graphite carbon; Metal contaminated sites; Metal-contaminated soils; Plant microbial fuel cell; Soil pollution; chromium derivative; hexavalent chromium; unclassified drug; chromium; chromium hexavalent ion; chromium; concentration (composition); contaminated land; electrical conductivity; electricity; electricity generation; electrochemical method; electrode; fuel cell; graphite; grass; pH; soil pollution; wetland; adsorption; Article; comparative study; controlled study; decontamination; electric conductivity; electric potential; electricity; evaluation study; field experiment; heavy metal removal; microbial fuel cell; nonhuman; Pennisetum; phytoremediation; plant microbial fuel cell; soil acidity; soil pollution; soil pollution control; toxic concentration; waste water treatment plant; wetland; bioenergy; bioremediation; electricity; metabolism; soil pollutant; Pennisetum; Biodegradation, Environmental; Bioelectric Energy Sources; Chromium; Electricity; Pennisetum; Soil Pollutants; Wetlands |
Appears in Collections: | 環境工程學研究所 |
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