PMID- 34412788 OWN - NLM STAT- MEDLINE DCOM- 20210823 LR - 20210823 IS - 1001-0742 (Print) IS - 1001-0742 (Linking) VI - 107 DP - 2021 Sep TI - Co-metabolic and biochar-promoted biodegradation of mixed PAHs by highly efficient microbial consortium QY1. PG - 65-76 LID - S1001-0742(21)00041-3 [pii] LID - 10.1016/j.jes.2021.02.002 [doi] AB - Polycyclic aromatic hydrocarbons (PAHs), typical representatives of the persistent organic pollutants (POPs), have become ubiquitous in the environment. In this study, a novel microbial consortium QY1 that performed outstanding PAHs-degrading capacity has been enriched. The degradation characteristics of single and mixed PAHs treated with QY1 were studied, and the effect of biochar on biodegradation of mixed PAHs and the potential of biochar in PAHs-heavy metal combined pollution bioremediation were also investigated. Results showed that, in single substrate system, QY1 degraded 94.5% of 500 mg/L phenanthrene (PHE) and 17.8% of 10 mg/L pyrene (PYR) after 7 days, while in PHE-PYR mixture system, the biodegradation efficiencies of PHE (500 mg/L) and PYR (10 mg/L) reached 94.0% and 96.2%, respectively, since PHE served as co-metabolic substrate to have significantly improved PYR biodegradation. Notably, with the cooperation of biochar, the biodegradations of PHE and PYR were greatly accelerated. Further, biochar could reduce the adverse impact of heavy metals (Cd(2+), Cu(2+), Cr(2)O(7)(2-)) on PYR biodegradation remarkably. The sequencing analysis revealed that Methylobacterium, Burkholderia and Stenotrophomonas were the dominant genera of QY1 in almost all treatments, indicating that these genera might play key roles in PAHs biodegradation. Overall, this study provided new insights into the efficient bioremediation of PAHs-contaminated site. CI - Copyright (c) 2021. Published by Elsevier B.V. FAU - Li, Min AU - Li M AD - Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangdong 510006, China. FAU - Yin, Hua AU - Yin H AD - Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangdong 510006, China. Electronic address: huayin@scut.edu.cn. FAU - Zhu, Minghan AU - Zhu M AD - Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangdong 510006, China. FAU - Yu, Yuanyuan AU - Yu Y AD - Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Guangdong 525000, China. FAU - Lu, Guining AU - Lu G AD - Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangdong 510006, China. FAU - Dang, Zhi AU - Dang Z AD - Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangdong 510006, China. LA - eng PT - Journal Article DEP - 20210211 PL - Netherlands TA - J Environ Sci (China) JT - Journal of environmental sciences (China) JID - 100967627 RN - 0 (Metals, Heavy) RN - 0 (Polycyclic Aromatic Hydrocarbons) RN - 0 (biochar) RN - 16291-96-6 (Charcoal) SB - IM MH - Biodegradation, Environmental MH - Charcoal MH - *Metals, Heavy MH - Microbial Consortia MH - *Polycyclic Aromatic Hydrocarbons OTO - NOTNLM OT - Biochar OT - Co-metabolism OT - Heavy metals OT - Microbial community OT - Microbial consortium OT - Polycyclic aromatic hydrocarbons EDAT- 2021/08/21 06:00 MHDA- 2021/08/24 06:00 CRDT- 2021/08/20 05:49 PHST- 2020/12/09 00:00 [received] PHST- 2021/01/20 00:00 [revised] PHST- 2021/02/01 00:00 [accepted] PHST- 2021/08/20 05:49 [entrez] PHST- 2021/08/21 06:00 [pubmed] PHST- 2021/08/24 06:00 [medline] AID - S1001-0742(21)00041-3 [pii] AID - 10.1016/j.jes.2021.02.002 [doi] PST - ppublish SO - J Environ Sci (China). 2021 Sep;107:65-76. doi: 10.1016/j.jes.2021.02.002. Epub 2021 Feb 11.