Effective biodegradation of pentachloronitrobenzene by a novel strain Peudomonas putida QTH3 isolated from contaminated soil

作者

Wang, Yan; Zhang, Xiqian; Wang, Lin; 更多内容

期刊:ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY ISSN:0147-6513 , 年:2019 . 卷:182

语种: English

原文链接:http://dx.doi.org/10.1016/j.ecoenv.2019.109463

摘要

To eliminate pentachloronitrobenzene (PCNB) residue in PCNB-contaminated environment, the degradation potential of Pseudomonas putida QTH3 to PCNB was evaluated in this study. Peudomonas putida QTH3 could grow well in mineral salt medium (MSM) containing PCNB as sole carbon and was able to degrade PCNB efficiently, whereas the degradation rate of P. putida QTH3 to PCNB increased gradually, and reached 49.84% in 35 days. The degradation rates of P. putida QTH3 to 13 tested organochlorine compounds found to be 10.85%-42.51% after 14 days. The metabolites during PCNB biodegradation by P. putida QTH3 were identified as catechol, 2, 3, 5, 6-tetrachloroaniline (TCA), 2, 3, 4, 5-TCA, 2, 3, 4, 5, 6-pentachloroaniline (PCA) and pentachlorothioanisole (PCTAs). Furthermore, possible degradation pathway of PCNB by P. putida QTH3 was proposed. The degradation rates of intracellular enzyme and extracellular enzyme were 44.73% and 8.93% after incubation with 100 mg L-1 PCNB for 30 min, respectively. Thus, intracellular enzyme is a major enzyme responsible for PCNB degradation. The results indicate that P. putida QTH3 can be a suitable organism for the degradation of PCNB, and facilitate its potential for the bioremediation of the environments contaminated with major organochlorine compounds used during this study.

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关键词
Pentachloronitrobenzene (PCNB); Pseudomonas putida; Degradation; Fungicide

附加关键词:
ORGANOCHLORINE PESTICIDES OCPS; POLYCHLORINATED-BIPHENYLS; RISK-ASSESSMENT; PHENOL; DEGRADATION; KINETICS; BIOTRANSFORMATION; BIOACCUMULATION; GINSENG; SINGLE

作者信息

通讯作者:
     Wang, CW; Wang, JM , Mingxian South St 1, Taigu 030801, Shanxi, Peoples R China.
作者机构:
     [1] [ Wang, Yan; Zhang, Xiqian; Wang, Chunwei; Wang, Meiqin; ︾ ] Shanxi Agr Univ, Coll Agr, Taigu 030801, Shanxi, Peoples R China.
     [2] [ Wang, Lin ] Shanxi Entry Exit Inspect & Quarantine Bur Techno, Yuncheng Sub Ctr, Yuncheng 044600, Shanxi, Peoples R China.
     [3] [ Fan, Weixin ] Shanxi Agr Univ, Expt Teaching Ctr, Taigu 030801, Shanxi, Peoples R China.
作者邮箱:
     yan314319@163.com
     chunwei314319@163.com
     jm.w@163.com