Tracing contaminants of emerging concern and their transformations in the whole treatment process of a municipal wastewater treatment plant using nontarget screening and molecular networking strategies

被引：2

作者：

Chen, Zhenguo ^{[1
,2
,5
,6
]}

Xia, Di ^{[3
]}

Liu, Huangrui ^{[3
]}

Wang, Rui ^{[3
]}

Huang, Mingzhi ^{[1
,2
,5
,6
]}

Tang, Ting ^{[4
]}

Lu, Guining ^{[4
]}

机构：

[1] South China Normal Univ, Sch Environm, Guangdong Prov Key Lab Chem Pollut & Environm Safe, Guangzhou 510006, Peoples R China

[2] South China Normal Univ, Sch Environm, MOE Key Lab Theoret Chem Environm, Guangzhou 510006, Peoples R China

[3] Minist Ecol & Environm, South China Inst Environm Sci, Guangzhou 510655, Peoples R China

[4] South China Univ Technol, Sch Environm & Energy, Guangzhou 510006, Peoples R China

[5] South China Normal Univ, SCNU NANAN Green & Low Carbon Innovat Ctr, Guangzhou 510006, Peoples R China

[6] South China Normal Univ, Guangdong Prov Engn Res Ctr Intelligent Low Carbon, Guangzhou 510006, Peoples R China

来源：

WATER RESEARCH | 2024年 / 267卷

基金：

中国国家自然科学基金;

关键词：

Contaminants of emerging concern; Wastewater treatment plant; Nontarget screening; Transformation products; Molecular network; PERSONAL CARE PRODUCTS; SEWAGE-TREATMENT PLANTS; MASS-SPECTROMETRY; ACTIVATED-SLUDGE; PHARMACEUTICALS; REMOVAL; BIODEGRADABILITY; ECOTOXICITY; EFFLUENTS; PRIORITY;

D O I：

10.1016/j.watres.2024.122522

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study employed nontarget screening with high-resolution mass spectrometry and molecular network strategy to characterize the occurrence and tranformation of contaminants of emerging concern (CECs) through a wastewater treatment plant in Guangzhou. We detected 70,631 compounds in positive mode and 14,423 in negative mode in influent, from which 94.5 % of these compounds were successfully eliminated after treatment. Among them, 510 chemicals were identified, with pharmaceuticals being the largest category excluding natural products, accounting for 146 compounds. And 29 CECs were semiquantified with concentrations ranging from 2.80 ng/L (Fluconazole) to 10,351 ng/L (Nicotine). The removal efficiency varied: 60 compounds were easily removable (>90 % removal), 17 were partially removable (40-90 % removal), and 44 were non-degradable (<40 % removal). Additionally, we tentatively identified transformation products (TPs) of CECs using a molecular network analysis, revealing over 20,000 compound pairs sharing common fragments, with 191 compounds potentially linked to 47 level 1 compounds, suggesting their role as TPs of CECs. These findings illuminated the actual treatment efficiency of wastewater treatment plants for CECs and the potential TPs, offering valuable insights for future improvements in wastewater management practices.

引用

页数：12