Biodegradation performance and diversity of enriched bacterial consortia capable of degrading high-molecular-weight polycyclic aromatic hydrocarbons. Issue 26 (23rd November 2022)

• Record Type: Journal Article
• Authors: Wang, Dongqi; Qin, Lu; Liu, Enyu; Chai, Guodong; Su, Zhenduo; Shan, Jiaqi; Yang, Zhangjie; Wang, Zhe; Wang, Hui; Meng, Haiyu; Zheng, Xing; Li, Huaien; Li, Jiake; Lin, Yishan
• Is Part Of: Environmental technology. Volume 43:Issue 26(2022)
• Page Start: 4200
• Page End: 4211
• Publication Date: 2022-11-23
• Subjects: Biodegradation -- heavy metal -- high molecular weight -- microbial community structure -- polycyclic aromatic hydrocarbon; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2021.1946163
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: Polycyclic aromatic hydrocarbons (PAHs) are key organic pollutants in the environment that pose threats to the ecosystem and human health. The degradation of high molecular weight (HMW) PAHs by enriched bacterial consortia has been previously studied, while the involved metabolisms and microbial communities are still unclear and warrant further investigations. In this study, five bacterial consortia capable of utilizing different PAHs (naphthalene, anthracene, and pyrene) as the sole carbon and energy sources were enriched from PAH-contaminated soil samples. Among the five consortia, consortium TC exhibited the highest pyrene degradation efficiency (91%) after 19 d of incubation. The degradation efficiency was further enhanced up to 99% by supplementing yeast extract. Besides, consortium TC showed tolerances to high concentrations of pyrene (up to 1000 mg/L) and different heavy metal stresses (including Zn 2+, Cd 2+, and Pb 2+ ). The dominant genus in consortium TC, GS, and PL showing relatively higher degradation efficiency for anthracene and pyrene was Pseudomonas, whereas consortium PG and GD were predominated by genus Achromobacter and class Enterobacteriaceae, respectively. Consortium TC, as a highly efficient HMW PAH-degrading consortium, could be applied for synergistic biodegradation of HMW PAHs and in situ bioremediation of the sites contaminated with both PAHs and heavy metals. GRAPHICAL ABSTRACT: UF0001