标题: High-efficiency degradation of phthalic acid esters (PAEs) by Pseudarthrobacter defluvii E5: Performance, degradative pathway, and key genes

作者: Chen, FY (Chen, Fangyuan); Chen, YC (Chen, Yuchi); Chen, C (Chen, Chang); Feng, L (Feng, Lu); Dong, YQ (Dong, Yiqie); Chen, J (Chen, Jiaao); Lan, JR (Lan, Jirong); Hou, HB (Hou, Haobo)

来源出版物: SCIENCE OF THE TOTAL ENVIRONMENT 卷: 794 文献号: 148719 DOI: 10.1016/j.scitotenv.2021.148719 出版年: NOV 10 2021

摘要: Phthalic acid esters (PAEs) are a class of biologically accumulated carcinogenic and teratogenic toxic chemicals that exist widely in the environment. This study, Pseudarthrobacter defluvii E5 was isolated from agricultural soils and showed efficient PAEs-degradation and-mineralization abilities for five PAEs, and encouraging PAEs tolerance and bioavailable range for dibutyl phthalate (DBP) and bis(2-ethylhexyl) phthalate (DEHP) (0.25-1200 mg/L). The complete catalytic system in E5 genome enables PAEs to be degraded into monoester, phthalate (PA) and Protocatechuic acid (PCA), which eventually enter the tricarboxylic acid cycle (TCA cycle). The preferred PAEs-metabolic pathway in soil by E5 is the metabolism induced by enzymes encoded by pehA, mehpH, pht Operon and pca Operon. For the first time, two para-homologous pht gene clusters were found to coexist on the plasmid and contribute to PAEs degradation. Further study showed that P. defluvii E5 has a broad application prospect in microplastics-contaminated environments. (c) 2021 Elsevier B.V. All rights reserved.

作者关键词: Microplastic; Plasticizers; Soil pollution; Bioremediation

地址: [Chen, Fangyuan; Chen, Yuchi; Feng, Lu; Dong, Yiqie; Chen, Jiaao; Lan, Jirong; Hou, Haobo] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China.

[Chen, Yuchi] Tsinghua Univ, Ctr Water & Ecol, Sch Environm, Beijing 100084, Peoples R China.

[Chen, Chang] State Environm Protect Key Lab Soil Hlth & Green, Wuhan 430070, Peoples R China.

[Chen, Chang] Huazhong Agr Univ, Coll Resource & Environm, Wuhan 430070, Peoples R China.

[Hou, Haobo] Zhaoqing Wuhan Univ, Environm Technol Res Inst, Zhaoqing 526200, Guangdong, Peoples R China.

通讯作者地址: Hou, HB (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China.

电子邮件地址: houhb@whu.edu.cn

影响因子：7.963