PMID- 32755786 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20200915 LR - 20200915 IS - 1879-1026 (Electronic) IS - 0048-9697 (Linking) VI - 744 DP - 2020 Nov 20 TI - Occurrence and risk assessment of emerging contaminants in a water reclamation and ecological reuse project. PG - 140977 LID - S0048-9697(20)34506-X [pii] LID - 10.1016/j.scitotenv.2020.140977 [doi] AB - Water reclamation and ecological reuse is gradually becoming a popular solution to address the high pollutant loads and insufficient ecological flow of many urban rivers. However, emerging contaminants in water reuse system and associated human health and ecological risks need to be assessed. This study determined the occurrence and human health and ecological risk assessments of 35 emerging contaminants during one year, including 5 types of persistent organic pollutants (POPs), 5 pharmaceutical and personal care products (PPCPs), 7 endocrine disrupting chemicals (EDCs) and 18 disinfection by-products (DBPs), in a wastewater treatment plant (WWTP) and receiving rivers, as well as an unimpacted river for comparison. Results showed that most of PPCPs and EDCs, especially antibiotics, triclosan, estrogens and bisphenol A, occurred frequently at relatively high concentrations, and they were removed from 20.5% to 88.7% with a mean of 58.9% via WWTP. The highest potential noncarcinogenic and carcinogenic risks in different reuse scenarios were assessed using maximal detected concentrations, all below the acceptable risk limits, with the highest total combined risk value of 9.21 x 10(-9) and 9.98 x 10(-7), respectively. Ecological risk assessment was conducted using risk quotient (RQ) method and indicated that several PPCPs, EDCs and haloacetonitriles (HANs) pose high risk (RQ > 1) to aquatic ecology in the rivers, with the highest RQ up to 83.8. The study suggested that ecological risks need to be urgently addressed by updating and optimizing the process in WWTPs to strengthen the removal efficiencies of emerging contaminants. The study can serve as a reference for safer water reuse in the future, while further studies could be conducted on the health risk of specific groups of people, exposure parameters in water reuse, as well as more emerging contaminants. CI - Copyright (c) 2020. Published by Elsevier B.V. FAU - Lin, Xiaohu AU - Lin X AD - State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China; Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93117, USA. FAU - Xu, Jingcheng AU - Xu J AD - State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. Electronic address: xujick@tongji.edu.cn. FAU - Keller, Arturo A AU - Keller AA AD - Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93117, USA. FAU - He, Li AU - He L AD - State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. FAU - Gu, Yunhui AU - Gu Y AD - State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. FAU - Zheng, Weiwei AU - Zheng W AD - State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. FAU - Sun, Danyan AU - Sun D AD - State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. FAU - Lu, Zhibo AU - Lu Z AD - State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. FAU - Huang, Juwen AU - Huang J AD - State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. FAU - Huang, Xiangfeng AU - Huang X AD - State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. FAU - Li, Guangming AU - Li G AD - State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze Water Environment, Ministry of Education, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. LA - eng PT - Journal Article DEP - 20200715 PL - Netherlands TA - Sci Total Environ JT - The Science of the total environment JID - 0330500 SB - IM OTO - NOTNLM OT - Ecological reuse OT - Emerging contaminants OT - Reclaimed water OT - Risk assessment OT - Water reuse COIS- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2020/08/07 06:00 MHDA- 2020/08/07 06:01 CRDT- 2020/08/07 06:00 PHST- 2020/05/19 00:00 [received] PHST- 2020/07/09 00:00 [revised] PHST- 2020/07/12 00:00 [accepted] PHST- 2020/08/07 06:00 [pubmed] PHST- 2020/08/07 06:01 [medline] PHST- 2020/08/07 06:00 [entrez] AID - S0048-9697(20)34506-X [pii] AID - 10.1016/j.scitotenv.2020.140977 [doi] PST - ppublish SO - Sci Total Environ. 2020 Nov 20;744:140977. doi: 10.1016/j.scitotenv.2020.140977. Epub 2020 Jul 15.