Organophosphate Flame Retardants and Perfluoroalkyl Substances in Drinking Water Treatment Plants from Korea: Occurrence and Human Exposure

In this study, the concentrations of organophosphate flame retardants (OPFR) and perfluoroalkyl substances (PFAS) were investigated in raw water and treated water samples obtained from 18 drinking water treatment plants (DWTPs). The ∑13OPFR concentrations in the treated water samples (29.5–122 ng/L; median 47.5 ng/L) were lower than those in the raw water (37.7–231 ng/L; median 98.1 ng/L), which indicated the positive removal rates (0–80%) of ∑13OPFR in the DWTPs. The removal efficiencies of ∑27PFAS in the DWTPs ranged from −200% to 50%, with the ∑27PFAS concentrations in the raw water (4.15–154 ng/L; median 32.0 ng/L) being similar to or lower than those in the treated water (4.74–116 ng/L; median 42.2 ng/L). Among OPFR, tris(chloroisopropyl) phosphate (TCIPP) and tris(2-chloroethyl) phosphate (TCEP) were dominant in both raw water and treated water samples obtained from the DWTPs. The dominant PFAS (perfluorooctanoic acid (PFOA) and perfluorohexanoic acid (PFHxA)) in the raw water samples were slightly different from those in the treated water samples (PFOA, L-perfluorohexane sulfonate (L-PFHxS), and PFHxA). The 95-percentile daily intakes of ∑13OPFR and ∑27PFAS via drinking water consumption were estimated to be up to 4.9 ng/kg/d and 0.22 ng/kg/d, respectively. The hazard index values of OPFR and PFAS were lower than 1, suggesting the risks less than known hazardous levels.

[1]  Jeong-eun Oh,et al.  Perfluoroalkyl substances and pharmaceuticals removal in full-scale drinking water treatment plants. , 2020, Journal of hazardous materials.

[2]  Jeong-eun Oh,et al.  Seasonal occurrence and removal of organophosphate esters in conventional and advanced drinking water treatment plants. , 2020, Water research.

[3]  Jeong-eun Oh,et al.  Evaluation of the current contamination status of PFASs and OPFRs in South Korean tap water associated with its origin. , 2018, The Science of the total environment.

[4]  Hyeon-Seo Cho,et al.  Tissue-specific distribution and bioaccumulation potential of organophosphate flame retardants in crucian carp. , 2018, Environmental pollution.

[5]  Ming-lin Wang,et al.  Preconcentration and Determination of Perfluoroalkyl Substances (PFASs) in Water Samples by Bamboo Charcoal-Based Solid-Phase Extraction Prior to Liquid Chromatography–Tandem Mass Spectrometry , 2018, Molecules.

[6]  K. Kannan,et al.  Occurrence, Removal, and Environmental Emission of Organophosphate Flame Retardants/Plasticizers in a Wastewater Treatment Plant in New York State. , 2017, Environmental science & technology.

[7]  G. Ying,et al.  Perfluoroalkyl substances (PFASs) in wastewater treatment plants and drinking water treatment plants: Removal efficiency and exposure risk. , 2016, Water research.

[8]  K. Kannan,et al.  Occurrence and exposure assessment of organophosphate flame retardants (OPFRs) through the consumption of drinking water in Korea. , 2016, Water research.

[9]  Hee-Young Kim,et al.  A national discharge load of perfluoroalkyl acids derived from industrial wastewater treatment plants in Korea. , 2016, The Science of the total environment.

[10]  Jing-fu Liu,et al.  Understanding the distribution, degradation and fate of organophosphate esters in an advanced municipal sewage treatment plant based on mass flow and mass balance analysis. , 2016, The Science of the total environment.

[11]  A. Covaci,et al.  Occurrence and risk assessment of organophosphate esters in drinking water from Eastern China. , 2015, The Science of the total environment.

[12]  H. Son,et al.  Occurrence of Organophosphorus Flame Retardants (OPFRs) in Nakdong River Basin : Mainstreams, Tributaries and STP Effluents , 2015 .

[13]  L. Looper,et al.  Stockholm Convention on Persistent Organic Pollutants , 2020, Essential Concepts of Global Environmental Governance.

[14]  S. Kennedy,et al.  Tris(2-butoxyethyl)phosphate and triethyl phosphate alter embryonic development, hepatic mRNA expression, thyroid hormone levels, and circulating bile acid concentrations in chicken embryos. , 2014, Toxicology and applied pharmacology.

[15]  Jeong-eun Oh,et al.  Foodstuff analyses show that seafood and water are major perfluoroalkyl acids (PFAAs) sources to humans in Korea. , 2014, Journal of hazardous materials.

[16]  Xiaowei Zhang,et al.  Occurrence of organophosphate flame retardants in drinking water from China. , 2014, Water research.

[17]  Mohammad Sohel Rahman,et al.  Behaviour and fate of perfluoroalkyl and polyfluoroalkyl substances (PFASs) in drinking water treatment: a review. , 2014, Water research.

[18]  Gloria B Post,et al.  Perfluorooctanoic acid (PFOA), an emerging drinking water contaminant: a critical review of recent literature. , 2012, Environmental research.

[19]  R. Ebinghaus,et al.  Organophosphorus flame retardants and plasticizers in airborne particles over the Northern Pacific and Indian Ocean toward the Polar Regions: evidence for global occurrence. , 2012, Environmental science & technology.

[20]  J. de Boer,et al.  Phosphorus flame retardants: properties, production, environmental occurrence, toxicity and analysis. , 2012, Chemosphere.

[21]  T. Stahl,et al.  Toxicology of perfluorinated compounds , 2011 .

[22]  Jack Thompson,et al.  Concentrations of PFOS, PFOA and other perfluorinated alkyl acids in Australian drinking water. , 2011, Chemosphere.

[23]  M. Zeilmaker,et al.  Levels of perfluorinated compounds in food and dietary intake of PFOS and PFOA in the Netherlands. , 2010, Journal of agricultural and food chemistry.

[24]  A. Zuber,et al.  Persistent Organic Pollutants , 2019, Chemical hazards in foods of animal origin.

[25]  Yasuyuki Zushi,et al.  Existence of nonpoint source of perfluorinated compounds and their loads in the Tsurumi River basin, Japan. , 2008, Chemosphere.

[26]  C. Lau,et al.  Perfluoroalkyl acids: a review of monitoring and toxicological findings. , 2007, Toxicological sciences : an official journal of the Society of Toxicology.

[27]  Ian T Cousins,et al.  Sources, fate and transport of perfluorocarboxylates. , 2006, Environmental science & technology.

[28]  Shane Snyder,et al.  Fate of endocrine-disruptor, pharmaceutical, and personal care product chemicals during simulated drinking water treatment processes. , 2005, Environmental science & technology.

[29]  A. N N E L I M A R K L U N D,et al.  Organophosphorus Flame Retardants and Plasticizers in Swedish Sewage Treatment Plants , 2005 .

[30]  B H Alexander,et al.  Mortality of employees of a perfluorooctanesulphonyl fluoride manufacturing facility , 2003, Occupational and environmental medicine.

[31]  J. Giesy,et al.  Global distribution of perfluorooctane sulfonate in wildlife. , 2001, Environmental science & technology.

[32]  D. Tomasko,et al.  Water quality issues in the Nakdong River Basin in the Republic of Korea , 1999 .