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co-metabolic and biochar-promoted biodegradation of mixed PAHs by highly efficient microbial consortium QY1

Journal of Environmental Sciences 2021年第9期33卷 65-76页

作者： Min Li Hua Yin Minghan Zhu Yuanyuan Yu Guining Lu Zhi Dang Key Laboratory of Ministry of Education on Pollution control and Ecosystem Restoration in Industry Clusters School of Environment and EnergySouth China University of TechnologyGuangdong 510006China Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and control School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyGuangdong 525000China

Polycyclic aromatic hydrocarbons(PAHs), typical representatives of the persistent organic pollutants(POPs), have become ubiquitous in the *** this study, a novel microbial consortium QY1 that performed outstanding PAHs-degrading capacity has been *** 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 *** 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 ***, with the cooperation of biochar, the biodegradations of PHE and PYR were greatly ***, biochar could reduce the adverse impact of heavy metals(Cd^(2+), Cu^(2+), Cr_(2)O_(7)^(2-)) on PYR biodegradation *** 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 ***, this study provided new insights into the efficient bioremediation of PAHs-contaminated site.

关键词： Polycyclic aromatic hydrocarbons Microbial consortium co-metabolism Biochar Heavy metals Microbial community

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Bio-removal of mixture of benzene,toluene,ethylbenzene,and xylenes/total petroleum hydrocarbons/trichloroethylene from contaminated water

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Journal of Environmental Sciences 2009年第6期21卷 758-763页

作者： SHIM Hojae MA Wei LIN Aijun CHAN Kaicho Department of Civil and Environmental Engineering Faculty of Science and Technology University of Macao Macao SAR China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Four pure cultures were isolated from soil samples potentially contaminated with gasoline compounds either at a construction site near a gas station in Fai Chi Kei,Macao SAR or in the northern parts of China（Beijing,and Hebei and Shandong）.The effects of different concentrations of benzene,toluene,ethylbenzene,and three isomers（ortho-,meta-,and para-） of xylene（BTEX）,total petroleum hydrocarbons（TPH）,and trichloroethylene（TCE）,when they were present in mixtures,on the bio-removal effciencies of microbial isolates were investigated,together with their interactions during the bio-removal *** the isolates were tested for the BTEX（50-350 mg/L）/TPH（2000 mg/L） mixture,BTEoX in BTEoX/TPH mixture was shown with higher bio-removal effciencies,while BTEmX in BTEmX/TPH mixture was shown with the lowest,regardless of *** TPH in BTEmX/TPH mixture,on the other hand,were generally shown with higher bio-removal effciencies compared to when TPH mixed with BTEoX and *** these BTEX mixtures（at 350 mg/L） were present with TCE（5-50 mg/L）,the stimulatory effect of TCE toward BTEoX bio-removal was observed for BTEoX/TCE mixture,while the inhibitory effect of TCE toward BTEmX for BTEmX/TCE *** bio-removal effciency for TPH was shown lower in TPH（2000 mg/L）/TCE（5-50 mg/L） mixtures compared to TPH present alone,implying the inhibitory effect of TCE toward TPH *** the mixture of BTEX（417 mg/L）,TPH（2000 mg/L） along with TCE（5- 50 mg/L）,TCE was shown co-metabolically removed more effciently at 15 mg/L,probably utilizing BTEX and/or TPH as primary substrates.

关键词： bio-removal benzene, toluene, ethylbenzene, and xylenes (BTEX) co-metabolism trichloroethylene total petroleumhydrocarbons

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The co-metabolic Biodegradation Kinetic Models of a Chlorinated Alkene With mutagenicity, carcinogenicity and teratogenicity by Two Strains of Aerobic Bacteria

The Co-metabolic Biodegradation Kinetic Models of a Chlorina...

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The 2nd International conference on Applied Mechanics and Mechanical Engineering(ICAMME 2011)

作者： Haitao Shang Qi Yang Yang Zhang School of Water Resource and Environment of China University of Geosciences(Beijing) Institute of Nuclear and New Energy Technology Tsinghua University

Purpose 1,1-DCE is a environmental pollutant of mutagenicity,carcinogenicity and *** paper studied the biodegradation of 1,1-DCE by two strains of aerobic bacteria which use benzene as co-metabolic *** First the two strains were activated,then through batch experiments,the residual concentrations of 1,1-DCE were *** The biodegradation rates were determined,and the varying trends of the biodegradation rates with the initial concentrations were fitted by some kinetic *** The biodegradation kinetics of1,1-DCE by the strain DB-I fits Monod Model,the corresponding parameters are v=0.015h,K= 10.18 mg·L,while the biodegradation kinetics by strain DB-M fits Haldane Model,and the parameters respectively are v =0.0063h,K =4.55mg·L,K=13.09mg·*** The specific substrate removal rate constant of 1,1-DCE by strain DB-I is higher than that of strain DBM,and they are both higher than those of the studies performed by other authors.

关键词： Mutagenicity-carcinogenicity-teratogenicity 1,1-DCE aerobic strains co-metabolism kinetics

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