Distribution characteristics of photoinitiators and their flux estimation from the Pearl River Delta to the coastal waters of the South China Sea  

作　　者：Yuqing He Zibin Pan Xinxin Liang Ruiman Xie Yuying Sun Juan Li YaweiWang Lixi Zeng 

机构地区：[1]Guangdong Key Laboratory of Environmental Pollution and Health,School of Environment,Jinan University,Guangzhou 511443,China [2]Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality,Jinan University,Guangzhou 511443,China [3]Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China

出　　处：《Journal of Environmental Sciences》2023年第6期71-80,共10页环境科学学报（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.21876063,22076064 and 22106169);the Guangdong Special Support Program(No.2019TX05L129);the Science and Technology Program of Guangzhou(No.202206010191);the Guangdong(China)Innovative and Entrepreneurial Research Team Program(No.2016ZT06N258);the Special Fund Project for Science and Technology Innovation Strategy of Guangdong Province(No.2019B121205004)。

摘　　要：Photoinitiators(PIs)are widely used in industrial polymerization processes.It has been reported that PIs are ubiquitous in indoor environments and that humans are exposed to PIs,but the occurrence of PIs in natural environments are rarely known.In the present study,25 PIs,including 9 benzophenones(BZPs),8 amine co-initiators(ACIs),4 thioxanthones(TXs)and 4 phosphine oxides(POs),were analyzed in water and sediment samples collected from eight riverine outlets of the Pearl River Delta(PRD).Eighteen,14,and 14 of the 25 target PIs were detected in water,suspended particulatematter(SPM)and sediment samples,respectively.The total concentrations of PIs in water,SPM,and sediment were in the ranges of 2.88–96.1 ng/L,9.25–923 ng/g dry weight(dw),and 3.79–56.9 ng/g dw,with geometric mean concentration(GM)of 10.8 ng/L,48.6 ng/g dw,and 17.1 ng/g dw,respectively.A significant linear regression was observed between the log partitioning coefficients(Kd)values of PIs and their log octanol water partition coefficient(Kow)values(R^(2)=0.535,p<0.05).The annual riverine input of PIs to the coastal waters of the South China Sea via eightmain outlets of the PRD was estimated to be 4.12×10^(3)kg/year,and the∑BZPs,∑ACIs,∑TXs and∑POs contributed to 1.96×10^(3),1.24×10^(3),89.6 and 830 kg/year,respectively.This is the first report of a systematic description of the occurrence characteristics of PIs exposure in water,SPM,and sediment.The environmental fate and risks of PIs in aquatic environments need further investigations.

关 键 词：PHOTOINITIATORS Riverine inputs Distribution characteristics Partitioning coefficients Pearl River Delta 

分 类 号：X52[环境科学与工程—环境工程]