HUA Jian^1,2，CHEN Manjia²，LI Fangbai²，LONG Jian¹，TONG Hui^2,3，LV Yahui²，LIU Chengshuai³

（1.Guizhou Key Laboratory of Mountain Environment, Guizhou Normal University, Guiyang 550001, China；
2.Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental Science & Technology, Guangzhou 510650, China；
3.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China）

Abstract: Batch experiments were used to investigate the kinetics of pentachlorophenol (PCP) degradation and the change of soil bacteria community in a paddy soil. Results showed that PCP (19 μmol/L) was completely degraded within 17 days. High-throughput sequencing analysis of the microbial community composition of the soils before and after reactions showed a significant shift in microbial communities responding to the PCP additives. The species evenness decreased rapidly with the addition of PCP, and then tended to restore to the original condition. Proteobacteria was the most dominant phyla in all five samples. At the family level, dechlorinating bacteria including Burkholderiaceae, Comamonadaceae, Geobacteraceae, Rhodocyclaceae and Pseudomonadaceae dominated the PCP degradation process. These findings will enrich the detailed biodegradation of organochlorinated pesticides in such a system.

Keyword: pentachlorophenol; high throughput sequencing; microbial community; reductive degradation

EARTH AND ENVIRONMENT Vol.46, No.3, Tot No.323, 2018, Page 225-230