聚吡咯改性电极强化MFC驱动铀污染土壤的电动修复研究
PPy-MODIFIED ELECTRODE ENHANCING MFC-DRIVEN ELECTROKINETIC REMEDIATION OF URANIUM CONTAMINATED SOIL
王永东 1袁野 1刘欣媛 1李梦婷 1刘骞 1王津华 1马建洪1
作者信息
- 1. 南华大学资源环境与安全工程学院,湖南衡阳 421001;南华大学铀矿冶生物技术国防重点学科实验室,湖南衡阳 421001
- 折叠
摘要
为探究聚吡咯(PPy)改性电极强化微生物燃料电池(MFC)驱动铀污染土壤的电动修复研究,利用PPy对碳毡电极进行改性,研究不同比例PPy改性电极对MFC的产电性能及其驱动铀污染土壤电动修复效果的影响.结果表明:PPy改性电极增强了 MFC的产电性能,CP100最大电压164 mV,最大功率密度18.92 mW/m2,比原始碳毡电极分别提升了 29.13％和43.12％;PPy作为MFC阴极增强了 土壤中铀的去除效果,其中CP50相较于原始碳毡电极铀的吸附率提升了约13倍;以MFC作为电源能够有效驱动土壤中的铀从阳极向阴极的迁移,其中CP50实验组近阳极区域土壤中铀的最大去除率高达56.42％.综上所述,PPy改性电极对微生物燃料电池的产电能力和铀的去除均具有明显的强化作用.
Abstract
To investigate the performance of polypyrrole(PPy)modified electrodes in enhancing the electrokinetic remediation of uranium contaminated soil driven by a microbial fuel cell(MFC),PPy was used to modify the carbon felt electrodes,to investigate the effect of different ratios of PPy modified electrode on the electrical production performance of MFC,as well as the electrokinetic remediation performance on uranium contaminated soil.The results showed that the PPy-modified electrodes enhanced the power generation performance of MFC.The maximum voltage of CP 100 reached 164 mV,and the maximum power density was 18.92 mW/m2,which was 29.13％and 43.12％higher than the original carbon felt electrodes,respectively;PPy,as an MFC cathode,enhanced the removal of uranium from soil,and the adsorption rate of uranium in CP50 was about 13 times higher than that in the original carbon felt electrode;MFC,as a power source,effectively drove the migration of uranium from the anode to the cathode in the soil.The maximum removal rate of uranium near the anode of the CP50 experimental group was as high as 56.42％.PPy-modified electrodes can significantly enhance the power generation capacity of microbial fuel cells and uranium removal.
关键词
电动修复/微生物燃料电池/聚吡咯/土壤污染/铀Key words
electrokinetic remediation(EKR)/microbial fuel cell(MFC)/polypyrrole/soil pollution/uranium引用本文复制引用
基金项目
湖南省自然科学基金青年项目(2021JJ40466)
湖南省自然科学基金(2022JJ30491)
湖南省教育厅重点项目(22A0308)
出版年
2024
NETL
NSTL
万方数据