Biodegradation of 3,5-dimethyl-2,4-dichlorophenol in saline wastewater by newly isolated Penicillium sp. yz11-22N2

In this study,the performance of 3,5-dimethyl-2,4-dichlorophenol（DCMX） degradation by a screened strain was investigated.18 S r DNA and the neighbor-joining method were used for identification of the isolated strain.The results of phylogenetic analysis and scanning electron micrographs showed that t...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2017-07, Vol.57 (7), p.211-220
Main Authors: Yan, Zhou, He, Huijun, Yang, Chunping, Zeng, Guangming, Luo, Le, Jiao, Panpan, Li, Huiru, Lu, Li
Format: Article
Language:English
Subjects:
3,5-Dimethyl-2,4-dichlorophenol
Biodegradation, Environmental
Chlorophenols - analysis
Chlorophenols - metabolism
Laccase
Penicillium - genetics
Penicillium - isolation & purification
Penicillium - metabolism
Penicillium sp
Saline wastewater
Salinity
Waste Disposal, Fluid
Waste Water - chemistry
Waste Water - microbiology
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - metabolism
傅里叶变换红外光谱
分离菌株
去除效率
含盐废水
生物降解
系统发育分析
降解能力
青霉
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Summary:In this study,the performance of 3,5-dimethyl-2,4-dichlorophenol（DCMX） degradation by a screened strain was investigated.18 S r DNA and the neighbor-joining method were used for identification of the isolated strain.The results of phylogenetic analysis and scanning electron micrographs showed that the most probable identity of the screened strain should be Penicillium sp.Growth characteristics of Penicillium sp.and degradation processes of DCMX were examined.Fourier transform infrared spectroscopy of the inoculated DCMX solution was recorded,which supported the capacity of DCMX degradation by the screened Penicillium sp.Under different salinity conditions,the highest growth rate and removal efficiency for DCMX were obtained at p H 6.0.The removal efficiency decreased from 100%to 66% when the DCMX concentration increased from 5 to 60 mg/L,respectively.Using a Box–Behnken design,the maximum DCMX removal efficiency was determined to be 98.4%.With acclimation to salinity,higher removal efficiency could be achieved.The results demonstrate that the screened Penicillium sp.has the capability for degradation of DCMX.
ISSN:1001-0742
1878-7320
DOI:10.1016/j.jes.2017.02.012