Biodegradation pathway and mechanism of tri (2-chloropropyl) phosphate by Providencia rettgeri  

作　　者：Jinming Ye Shaoyu Tang Rongliang Qiu Shuona Chen Huiling Liu 

机构地区：[1]College of Natural Resources and Environment of South China Agricultural University,Guangzhou 510642,China [2]Guangdong Provincial Key Laboratory of Agricultural&Rural Pollution Abatement and Environmental Safety,Guangzhou 510642,China [3]Research Center for Eco-Environmental Engineering,Dongguan University of Technology,Dongguan 523808,China

出　　处：《Journal of Environmental Sciences》2024年第10期26-34,共9页环境科学学报（英文版）

基　　金：This work was supported by the Natural Science Foundation of Guangdong Province(No.2023A1515030284);the Key Realm Research and Development Program of Guangdong Province(No.2020B0202080001);the Guangdong Laboratory for Lingnan Modern Agriculture Project(No.NT2021010);the Science and Technology Planning Project of Guangdong Province(No.2021B1212040008).

摘　　要：Tri(2-chloropropyl)phosphate(TCPP)was an emerging contaminant of global concern because of its frequent occurrence,potential toxic effects,and persistence in the environment.Microbial degradation might be an efficient and safe removal method,but limited information was available.In this study,Providencia rettgeri was isolated from contaminated sediment and showed it could use TCPP as unique phosphorus source to promote growth,and decompose 34.7%of TCPP(1 mg/L)within 5 days.The microbial inoculation and the initial concentration of TCPP could affect the biodegradation efficient.Further study results indicated that TCPP decomposition by Providencia rettgeri was mainly via phosphoester bond hydrolysis,evidenced by the production of bis(2-chloropropyl)phosphate(C_(6)H_(13)Cl_(2)PO_(4))and mono-chloropropyl phosphate(C_(3)H_(8)ClPO_(4)).Both intracellular and extracellular enzymes could degrade TCPP,but intracellular degradation was dominant in the later reaction stage,and the presence of Cu^(2+) ions had a promoting effect.These findings developed novel insights into the potential mechanism of TCPP microbial degradation.

关 键 词：Chlorinated organophosphate flame retardants Microbial degradation Degradation pathway Providencia rettgeri Tri(2-chloropropyl)phosphate 

分 类 号：X172[环境科学与工程—环境科学]