Increased Human Exposure to Organophosphate Esters via Ingestion of Drinking Water from Water Dispensers: Sources, Influencing Factors, and Exposure Assessment

• DOI: 10.1021/acs.estlett.1c00592
• Publication Date: 2021-09-01T12:00:27Z
• Authors: Minmin Hou; Yali Shi; Guangshui Na; Zongshan Zhao; Yaqi Cai
• Keywords: Inhalation exposure

Little is known about the presence of organophosphate esters (OPEs) in drinking water from dispensers, which are popular China. In this study, 22 OPEs were measured barreled (BW), normal-temperature (NTW), and hot (HW) collected 53 dispensers. Eight frequently detected, with total concentrations (median) increasing by 23- 52-fold NTW HW, respectively, compared BW. Six exhibited significantly higher levels HW than The gradually increased several after it had been stored plastic tanks, coupled frequent detection seven silicone tubes, demonstrated that tanks tubes sources release OPEs. may be due to adsorption air dust. Simulation experiments suggested amount released depends upon temperature time contact between sources. estimated daily intake via dispensers was 39 times BW, indicating increase risk human exposure Chinese adults TCIPP inhalation dust ingestion needs studied.