More rapid dechlorination of 2,4-dichlorophenol using acclimated bacteria

被引：0

作者：

Yan, Ning ^{[1
,2
]}

An, Meng ^{[1
,2
]}

Chu, Junyi ^{[1
,2
]}

Cao, Lifeng ^{[1
,3
]}

Zhu, Ge ^{[1
,2
]}

Wu, Weimin ^{[1
,2
]}

Wang, Lu ^{[1
,2
]}

Zhang, Yongming ^{[1
,2
]}

Rittmann, Bruce E. ^{[4
]}

机构：

[1] Department of Environmental Engineering, School of Environmental and Geographical Science, Shanghai Normal University, Shanghai,200234, China

[2] Yangtze Delta Wetlands Ecosystem National Field Scientific Observation and Research Station, China

[3] School of Environment, Tsinghua University, Beijing,100084, China

[4] Biodesign Swette Center for Environmental Biotechnology, Arizona State University, 85287-5701, United States

来源：

Bioresource Technology | 2021年 / 326卷

关键词：

Mineralogy; -; Bacteria; Dechlorination;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The key step for anaerobic biodegradation of 2,4-dichlorophenol (2,4-DCP) is an initial dechlorination reaction, but Cl in the para-position is more difficult to remove than Cl in the ortho-position using normal 2,4-DCP-acclimated bacteria. In this work, a bacterial community previously acclimated to biodegrading 2,4-DCP slowly dechlorinated 4-chlorophenol (4-CP Cl only in the para-position), which limited mineralization. That community was exposed to the selective pressure of having 4-CP as its only organic substrate in order to generate a 4-CP-dechlorinating community. When the 4-CP-dechlorinating community was challenged with 2,4-DCP, 4-CP hardly accumulated, although the kinetics for 2,4-DCP biodegradation were slower. When the community acclimated to 4-CP was mixed with the community acclimated to 2,4-DCP, the 2,4-DCP removal rate remained high, and 4-CP was more rapidly biodegraded. The genera Treponema, Blvii28, Dechloromonas, Nitrospira, and Thauera were significantly more abundant in the 4-CP-dechlorinating biomass and may have played roles in 2,4-DCP dechlorination and mineralization. © 2021 Elsevier Ltd

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