磁铁矿负载生物炭强化厌氧微生物处理2,4-二氯苯酚废水  

Magnetite-loaded biochar for enhanced anaerobic microbial treatment of 2,4-dichlorophenol wastewater

作　　者：杨柳 王名威 张耀斌[1] YANG Liu;WANG Mingwei;ZHANG Yaobin(School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,Liaoning,China;School of Environmental,Tsinghua University,Beijing 100084,China)

机构地区：[1]大连理工大学环境学院,辽宁大连116024 [2]清华大学环境学院,北京100084

出　　处：《化工进展》2022年第9期5065-5073,共9页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(51978122);兴辽英才科技创新项目(XLYC1902075)。

摘　　要：氯酚类化合物是一类对环境具有持续污染性的有毒有机物,在厌氧处理时具有生物毒害性。本文通过构建磁铁矿改性生物炭改善上流式厌氧污泥床(UASB)内的导电性与加快铁还原过程,强化厌氧微生物对氯酚废水的去除效果。结果表明,加入磁铁矿负载生物炭的反应器化学需氧量(COD)、2,4-二氯苯酚去除率分别提高了20%与54.1%。磁铁矿负载生物炭具有多官能团与强接受/贡献电子能力,反应器内污泥充放电性提升23.8%。微生物群落结构分析显示,磁铁矿负载生物炭的加入提高了Mesotoga等水解菌丰度,提高了Petrimonas等具有电子传递功能的细菌丰度,抵抗高有机负荷冲击,加速酚类化合物的降解与转化。Chlorophenol compounds are a kind of persistent organic pollutants,which are toxic to microorganisms during anaerobic wastewater treatment.In this experiment,the magnetite-modified biochar was added to improve the removal of chlorophenol in the upflow anaerobic sludge bed(UASB)reactors by enhancing the sludge conductivity and accelerating the iron reduction process.Results show that the removal rate of COD and 2,4-dichlorophenol in the reactor with magnetite-loaded biochar increases by 20%and 54.1%,respectively.Magnetite-loaded biochar has multiple functional groups and strong ability to accept/donate electrons,and thus the charge and discharge performances of sludge in the reactor with biochar are increased by 23.8%.Microbial community structure analysis shows that the addition of magnetite-loaded biochar increases the abundances of hydrolytic bacteria such as Mesotoga and bacteria capable of electron transfer function such as Petrimona,which accelerates the degradation of phenolic compounds.

关 键 词：生物炭 磁铁矿 2 4-二氯苯酚 胞外电子传递 铁还原 

分 类 号：X52[环境科学与工程—环境工程]