Enhanced quinoline removal by zero-valent iron-coupled novel anaerobic processes: performance and underlying function analysis.
Enhanced quinoline removal by zero-valent iron-coupled novel anaerobic processes: performance and underlying function analysis.
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零价铁耦合新型厌氧过程增强喹啉去除：性能和基础功能分析
DOI：
10.1039/c8ra09529a
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发表时间：
2019-01-09
期刊：
影响因子：
3.9
通讯作者：
Yue, Xiuping
中科院分区：
文献类型：
--
作者：
Wang, Sufang;Zhou, Aijuan;Zhang, Jiaguang;Liu, Zhaohua;Zheng, Jierong;Zhao, Xiaochan;Yue, Xiuping
喹啉具有毒性，难以生物降解，对生态系统安全构成严重威胁。为了促进喹啉的还原，通过间歇实验将零价铁（ZVI）引入厌氧消化（AD）系统。三种不同类型的ZVI的性能（即，系统研究了铁粉、铁屑和锈铁屑对喹啉降解、甲烷生成、挥发性脂肪酸（VFAs）生成和化学需氧量（COD）去除的影响。与单独的AD系统相比，ZVI能有效地提高喹啉和COD的去除率以及甲烷和乙酸的生成量，尤其是锈铁屑。喹啉和COD的去除率分别提高了28.6%和19.9%。增强效果归因于亚铁离子的高积累和高pH自缓冲能力，这是由ZVI添加建立。高通量测序分析表明，ZVI-AD系统中功能微生物数量高于AD系统，ZVI的添加类型对构建活性污泥中固有微生物群落具有重要作用。特别是，能够降解喹啉的微生物，如假单胞菌和芽孢杆菌，在耦合系统中的高度富集检测。
Quinoline is toxic and difficult to degrade biologically; thus, it is a serious threat to the safety of ecosystems. To promote quinoline reduction, zero-valent iron (ZVI) was introduced into an anaerobic digestion (AD) system through batch experiments. The performance of three different types of ZVI (i.e., iron powder, iron scrap and rusty iron scrap) on quinoline degradation, methane production, formation of volatile fatty acids (VFAs) and chemical oxygen demand (COD) removal were investigated systematically. Compared to the AD system alone, quinoline and COD removal as well as the production of methane and acetic acid were effectively enhanced by ZVI, especially rusty iron scrap. The removal efficiencies of quinoline and COD were increased by 28.6% and 19.9%, respectively. The enhanced effects were attributed to the high accumulation of ferrous ions and high pH self-buffering capability, which were established by ZVI addition. Furthermore, high-throughput sequencing analysis indicated that the functional microorganisms in the ZVI-AD system were higher than in the AD system, and the added types of ZVI played important roles in structuring the innate microbial community in waste activated sludge (WAS). Especially, high enrichment of microorganisms capable of degrading quinoline, such as Pseudomonas and Bacillus, in the coupled system was detected.
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