文献类型：期刊文献

英文题名：Performances and structures of functional microbial communities in, the mono azo dye decolorization and mineralization stages

作者：Zhu, Yuling[1];Cao, Xiwei[2];Cheng, Yutong[3];Zhu, Tingting[4]

机构：[1]Shaoxing Univ, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China;[2]Taiyuan Univ Technol, Coll Environm Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China;[3]China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China;[4]State Environm Protect, Key Lab Drinking Water Source Management & Techno, Shenzhen Key Lab Drinking Water Source Safety Con, Shenzhen Key Lab Emerging Contaminates Detect & C, Shenzhen 51800, Guangdong, Peoples R China

年份：2018

卷号：210

起止页码：1051

外文期刊名：CHEMOSPHERE

收录：SCI-EXPANDED(收录号：WOS:000447112600119)、、Scopus(收录号：2-s2.0-85053180079)、WOS

基金：This study was supported by Shaoxing science and technology project [2017B70057], National Natural Science Foundation of China [grant number 21206093], Innovation and entrepreneurship training program in Zhejiang [2017R428001] and National undergraduate training program for innovation and Entrepreneurship [201710349006].

语种：英文

外文关键词：Azo-dye; High-throughput Miseq sequencing; Microbial community structure; Decolorization; Mineralization

外文摘要：Removal of azo dye from wastewater with biological method is a complicated process, including decolorization and mineralization. However, there is little understanding of the functional microbial community involved in the whole dye degradation process. In this study, a simplified model using anaerobic(3)-oxic(2)-sedimentaion reactor was proposed. Acid Orange and Methyl Orange were treated as model azo dyes. In each compartment, the degradation intermediates of azo dyes were identified with UV-Vis, FTIR, HPLC-MS and GC-MS, and the corresponding microorganisms were determined with 16S rDNA high throughput Miseq sequencing. Decolorization happened in anaerobic compartments, while mineralization of the resulted aromatic amines mainly occurred under aerobic circumstance. LEfSe analysis demonstrated that the microbial community compositions were significantly influenced by the chemical structures of substrates. With t-value biplot, the relationship between azo dye degradation and microbial community structure was proposed statistically. It was found that the functional microbial communities varied with the change of azo dye degradation intermediates. Besides, cleavage of benzene ring also happened under anaerobic circumstance. This may be due to the genera of Parabacteroides and Bacteroides, which exhibited significantly positive relationships with 1,4-Benzenediol. With the new model, the performances and structures of functional microbial communities for -N=N- reduction and aromatic amines mineralization were characterized and the reaction mechanism was explored. (C) 2018 Elsevier Ltd. All rights reserved.