共代谢
生物降解
环境化学
碳氢化合物
化学
异养
甲烷
降级(电信)
氯苯
生物修复
细菌
有机化学
生态学
生物
污染
催化作用
电信
遗传学
计算机科学
作者
Peipei Chen,Hao Líu,Zhilin Xing,Wang Yongqiong,Xiaoping Zhang,Tiantao Zhao,Yunru Zhang
标识
DOI:10.1016/j.ecoenv.2021.113110
摘要
The cometabolism mechanism of chlorinated hydrocarbon solvents (CHSs) in mixed consortia remains largely unknown. CHS biodegradation characteristics and microbial networks in methanotrophic consortia were studied for the first time. The results showed that all CHSs can efficiently be degraded via cometabolism with a maximum degradation rate of 4.8 mg/(h·gcell). Chloroalkane and chloroethylene were more easily degraded than chlorobenzenes by methanotrophic consortia, especially nonfully chlorinated aliphatic hydrocarbons, which were converted to Cl- with a production rate of 0.29-0.36 mg/(h·gcell). In addition, the microecological response results indicated that Methylocystaceae (49.0%), Methylomonas (65.3%) and Methylosarcina (41.9%) may be the major functional degraders in methanotrophic consortia. Furthermore, the results of the microbial correlation network suggested that interactive relationships constructed by type I methanotrophs and heterotrophs determined biodegradability. Additionally, PICRUSt analysis showed that CHSs could increase the relative abundance of CHS degradation genes and reduce the relative abundance of methane oxidation genes, which was in good agreement with the experimental results.
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