微生物燃料电池修复石油污染盐碱土壤

发布时间：2018-02-20 23:46

  本文关键词： 生物电化学修复 土壤微生物燃料电池 内阻 产电 石油烃降解　出处：《环境工程学报》2017年02期 　论文类型：期刊论文

【摘要】：生物电化学技术修复石油污染土壤并同步产出电能是一种新兴的污染土壤生态修复技术。对石油污染土壤通过其微生物燃料电池的构造,利用电化学阻抗谱分析了土壤的欧姆内阻,拟合估算了土壤的电导率,并考察了土壤微生物燃料电池的产电性能和修复效果。结果表明:采用丙酮清洗过的阳极并有水封的情况下,土壤微生物燃料电池的欧姆内阻下降了52%,电导率升高了1倍;在启动后的120 h内,最大电压和累计产出电量分别达189 m V和36 C,与对照相比分别增加了20和29倍。输出电压随着阴极与阳极之间距离的增大而减小。经过30 d的生物电化学处理,土壤中的总石油烃去除率是开路对照的3.3倍。该研究是石油污染盐碱土壤生物电化学修复的初步探索,以为污染土壤的生态修复提供新的思路。
[Abstract]:Bioelectrochemical remediation of petroleum-contaminated soil and synchronous production of electric energy is a new ecological remediation technology for oil-contaminated soil. The ohmic internal resistance of soil was analyzed by electrochemical impedance spectroscopy, and the conductivity of soil was estimated by fitting. The results showed that the ohmic resistance of soil microbial fuel cell decreased 52% and the conductivity increased by 1 times when the anode cleaned by acetone and water seal was used. Within 120 hours after startup, The maximum voltage and accumulative output power reached 189 MV and 36 C respectively, which were 20 and 29 times higher than those of the control, respectively. The output voltage decreased with the increase of the distance between cathode and anode, and was treated with bioelectrochemistry for 30 days. The removal rate of total petroleum hydrocarbon in soil is 3.3 times that of open-circuit control. This study is a preliminary exploration of bioelectrochemical remediation of saline-alkali soil contaminated by petroleum and provides a new idea for ecological remediation of contaminated soil.
，

本文编号：1520378