微生物燃料电池技术处理含铬废水的实验研究  

Chromium-Containing Wastewater Treatment Using a MFC Method

作　　者：李方[1] 金春姬[1,2] 崔灿洙 林凤洙 

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100 [2]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100 [3]大田大学应用化学系,韩国大田300716 [4]大田大学环境工学系,韩国大田300716

出　　处：《中国海洋大学学报（自然科学版）》2013年第12期81-86,共6页Periodical of Ocean University of China

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07010-008-04);山东省自然科学基金项目(ZR2011BM014)资助

摘　　要：采用以碳刷为阳极、碳布为阴极的双室微生物燃料电池技术(MFC),对含铬废水中Cr(VI)的去除效率以及电池的产电性能进行研究。分别就阴阳极电解液的浓度、阴极电解液缓冲性、阴极通入不同的气体等影响因素进行考察。结果表明:当300和25mmol/L KCl分别加入电池的阴极液和阳极液时,相比于阴极添加200mmol/L KCl而阳极无KCl添加,产电功率有51.52%的提高;阴极液保持强酸性(pH=2.0)有利于Cr(VI)的还原,添加具有缓冲作用的KH2PO4保证了溶液酸度的稳定,使Cr(VI)的去除率由70.02%上升到99.89%;对比空气阴极和氮气阴极,阴极通入空气可能产生中间产物H2O2,它加快了Cr(VI)的去除,同时使产电功率提高了20%,电池内阻在通入空气和氮气的条件下均约为100Ω。阴极液中O2与Cr(VI)的同时存在能优化MFC的性能。By using a dualchambered microbial fuel cell（MFC） with carbon brush as the anode and car bon cloth as the cathode to treat Crcontainimg wastewater, the Cr（VI） removal efficiency and power gen eration characteristics are studied. The effects of concentration of anolyte and catholyte, buffer condition of catholyte, different gas bubbled in cathode are investigated. The results showed that when 300 mM KC1 and 25 mM KC1 were added to the catholyte and the anolyte, respectively, there was a 51.52% improve ment in power density achieved from the addition of 200 mM KC1 to the catholyte and no KC1 addition to the anolyte. Catholyte which kept in a low pH（2.0） would benefit Cr（VI） reduction, KH2PO4, was added into catholyte, which could be as a buffer solution to stabilize the pH and make the Cr（VI） removal effi ciency increased from 70. 02%to 99.89%. Comparing with N2bubbling cathode, airbubbling cathode seemed to generate the intermediate H202, which accelerated Cr（VI） reduction and achieved 20% im provement in the maximum power density, the internal resistance almost the same （100 Ω）. 02 and Cr （VI） both existed in catholyte could make the MFC function better.

关 键 词：微生物燃料电池 污水 铬去除 产电效率 

分 类 号：X131.2[环境科学与工程—环境科学]