双室MFC对含Cu(Ⅱ)废水处理效能及其产电性能的影响  

Electricity Production Performance and Heavy Metal Treatment Effect of MFC for Cu(II)-Containing Wastewater

作　　者：王辉[1,2] 马江航 米钺 董雯 李家科[1,2] 徐志嫱 WANG Hui;MA Jianghang;MI Yue;DONG Wen;LI Jiake;XU Zhiqiang(State Key Laboratory of Ecological Water Conservancy in Northwest Arid Region,Xi'an University of Technology;School of Water Resources and Hydro-Electric Engineering,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验室 [2]西安理工大学水利水电学院,陕西西安710048

出　　处：《水处理技术》2023年第5期74-79,共6页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(42107030);陕西省自然科学基础研究计划项目(2020JQ-617,2021JM-329);陕西省秦创原“科学家+工程师”队伍建设项目(2022KXJ-115)。

摘　　要：微生物燃料电池(microbial fuel cells,MFCs)可利用微生物将化学能转化为电能,并实现重金属的去除与还原回收。本研究构建了一种双室MFC用于处理含Cu^(2+)的重金属废水,以探究不同初始浓度及阴极电极材料下MFC的产电性能和Cu^(2+)的去除效果。结果表明,当阴极电极材料为不锈钢且阴极中Cu^(2+)的初始浓度由10 mg/L增大至200 mg/L时,Cu^(2+)的去除率由85.37%增大至98.16%(120 h),最大输出电压和功率密度分别为257 mV和36.75 mW/m^(2)。当阴极电极材料为石墨板、钛片时,Cu^(2+)的去除率分别为99.02%、98.27%,此时的最大输出电压和功率密度分别是不锈钢的1.45倍、1.18倍和1.71倍1.28倍。对阴极上附着的产物进行扫描电镜分析,Cu^(2+)在阴极发生了还原反应,生成了单质铜。本研究可以为实现MFC高效回收重金属提供理论依据,对利用MFC解决环境污染和能源短缺问题有重要意义。Microbial fuel cells(MFCs)can convert chemical energy into electrical energy by microorganisms and achieve the removal and recovery of heavy metals.This paper constructed a dual-chamber MFC to treat heavy metal wastewater containing Cu^(2+)to investigate the electricity generation performance and Cu^(2+)removal effect of different initial concentrations and cathode materials.The results showed that the removal rate of Cu^(2+)increased from 85.37%to 98.16%(120 h)when the cathode electrode material was stainless steel and the initial concentration of Cu^(2+)in the cathode was increased from 10 mg/L to 200 mg/L,and with the maximum output voltage and power density of 257 mV and 36.75 mW/m^(2),respectively.When the cathode electrode material was graphite plate and titanium sheet,the removal rate of Cu^(2+)was 99.02%and 98.27%,respectively,and the maximum voltages and power densities were 1.45 times,1.18 times,and 1.71 times 1.28 times than those of stainless steel,respectively.By SEM analysis,Cu^(2+)underwent a reduction reaction at the cathode,producing elemental copper.This study could provide a theoretical basis for realizing the efficient recovery of heavy metals by MFCs,which was essential to solving the problems of environmental pollution and energy shortage by using MFC.

关 键 词：微生物燃料电池 重金属回收 阴极还原 产电性能 电极材料 

分 类 号：X703[环境科学与工程—环境工程]