Perfluoroalkyl acids in selected wastewater treatment plants and their discharge load within the Lake Victoria basin in Kenya
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A major ecological challenge facing Lake Victoria basin is the influx of chemical contaminants from domestic, hospital, and industrial effluents. Determined levels of perfluoroalkyl acids (PFAAs) in wastewater and sludge from selected wastewater treatment plants (WWTPs) in Kenya are presented and their daily discharge loads calculated for the first time within the Lake Victoria basin. Samples were extracted and separated using solid-phase extraction and ultra-performance liquid chromatography (UPLC)-MS/MS or LC-MS/MS methodology. All sewage sludge and wastewater samples obtained from the WWTPs contained detectable levels of PFAAs in picogram per gram dry weight (d.w.) and in nanogram per liter, respectively. There was variability in distribution of PFAAs in domestic, hospital, and industrial waste with domestic WWPTs observed to contain higher levels. Almost all PFAA homologues of chain length C-6 and above were detected in samples analyzed, with long-chain PFAAs (C-8 and above chain length) being dominant. The discharge from hospital contributes significantly to the amounts of PFAAs released to the municipal water systems and the lake catchment. Using the average output of wastewater from the five WWTPs, a mass load of 1013 mg day−1 PFAAs per day discharged has been calculated, with the highest discharge obtained at Kisumu City (656 mg day−1). The concentration range of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) in wastewater was 1.3–28 and 0.9–9.8 ng L−1 and in sludge samples were 117–673 and 98–683 pg g−1, respectively.
KeywordsPerfluoroalkyl acids Discharge WWTPs Wastewater Sludge UPLC-MS/MS Lake Victoria
We acknowledge the Department of Applied Environmental Science (ITM), Stockholm University, where sample analysis was made possible.
- 3M Company (2001). Material Safety Data Sheet FC-26 FLUORAD Brand Fluorochemical Acid, ID Number/U.P.C.:ZF-0002-0376-8. Available at: http://www.3M.com/US/safety/index.jhtml.
- 3M Company (2001). Environmental monitoring - multi-city study. (Water, sludge, sediment, POTW effluent and landfill leachate samples). Docket AR-226-1030a; U.S. Environmental Protection Agency, Office of Pollution and Prevention and Toxic Substances: Washington, DC.Google Scholar
- Brooke, D., Footitt, A., & Nwaogu, T. A. (2004). Environmental risk evaluation report: perfluorooctane sulfonate (PFOS). London UK: UK Environment Agency, 5–51. https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/290857/scho1009brbl-e-e.pdf. Accessed 14 Sept 2004.
- Buck, R. C., Frankline, J., Beerger, U., Conder, J. M., Colinsin, I. T., De Voogt, P., Jensen, A. A., Kannan, K., Mabury, S. A., & Van Leeuwen, S. P. (2011). Perfluoroalkyl and polyfluoroalkyl in the environment: terminology, classification and origin. Integrated Environmental Assessment Management, 7(4), 513–541.CrossRefGoogle Scholar
- European Commission (2013). Directive 2013/39/EU of the European Parliament and of the Council of 12 August 2013 amending Directives 2000/60/EC and 2008/105/EC as regards priority substances in the field of water policy. Official Journal of the European Union, 24.8, L 226/1. http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=uriserv:OJ.L_.2013.226.01.0001.01.ENG. Accessed 20–24 Aug 2013.
- Filipovic, M., Woldegiorgis, A., Norström, K., Bibi, M., Lindberg, M., & Österås, A.-H. (2014). Historical usage of aqueous film forming foam: a case study of the widespread distribution of perfluoroalkyl acids from a military airport to groundwater, lakes, soils and fish. Chemosphere. doi: 10.1016/j.chemosphere.2014.09.005.Google Scholar
- Holzer, J., Midasch, O., Rauchfuss, K., Kraft, M., Reupert, R., Angerer, J., Kleeschulte, P., Marschall, N., & Wilhelm, M. (2008). Biomonitoring of perfluorinated compounds in children and adults exposed to perfluorooctanoate-contaminated drinking water. Environmental Health Perspectives, 116(5), 651–657.CrossRefGoogle Scholar
- Houde, M., Martin, J. W., Letcher, R. J., Solomon, K. R., & Muir, D. C. G. (2006). Biological monitoring of polyfluoroalkyl substances, a review. Environmental Science & Technology, 40, 346–3473.Google Scholar
- Kallenborn, R., Berger, U., & Järnberg, U. (2004). Perfluorinated alkylated substances (PFASs) in the Nordic environment (p. 552). Copenhagen DK: Nordic Council Publication.Google Scholar
- Kissa, E. (2001). Fluorinated Surfactants and Repellant (2nd ed.). New York: Marcel Dekker.Google Scholar
- Kudo, N., Suzuki-Nakajima, E., Mitsumoto, A., & Kawashima, Y. (2006). Responses of the liver to perfluorinated fatty acids with different carbon chain length in male and female mice: in relation to induction of hepatomegaly, peroxisomal β-oxidation and microsomal 1-acylglycerophosphocholine acyltransferase. Biological and Pharmaceutical Bulletin, 29, 1952–1957.CrossRefGoogle Scholar
- Lindstrom, A. B., Strynar, M. J., & Libelo, E. L. (2011). Polyfluorinated compounds: past, present, and future. Environmental Science & Technology, 45.Google Scholar
- Orata, F., Quinete, N., Werres, F., & Wilken R. D. (2009). Determination of perfluorooctanoic acid and perfluorooctane sulfonate in Lake Victoria Gulf Water. Bulletin of Environmental Contamination and Toxicology, 82(2), 218–222.Google Scholar
- RBA PTS, Sub-Saharan Africa Report (2002). UNEP/GEF: regionally based assessment of persistent toxic substances. <http://www.chem.unep.ch/pts/regreports/ssafrica.pdf>.
- Shivakoti, B. R., Tanak, S., Fuji, S., Kunacheva, C., Boontanon, S. K., Musirat, C., Seneviratne, S. T., & Tanaka, H. (2010). Occurrences and behavior of perfluorinated compounds (PFCs) in several wastewater treatment plants (WWTPs) in Japan and Thailand. Journal of Environmental Monitoring, 12, 1255–1264.CrossRefGoogle Scholar
- Stockholm Convention (2009). In Report of the Conference of the Parties of the Stockholm Convention on Persistent Organic Pollutants on the Work of its Fourth Meeting. UNEP/POPS/COP.4/38, 8 May 2009.Google Scholar
- Stockholm Convention (2013). Guidance on sampling, screening and analysis of persistent organic pollutants in products and articles. Relevant to the substances listed in Annexes A, B and C to the Stockholm Convention on Persistent Organic Pollutants in 2009 and 2011. Draft.Google Scholar
- Taniyasu, S., Kannan, K., So, M. K., Gulkowska, A., Sinclair, E., Okazawa, T., & Yamashita, N. (2005). Analysis of fluorotelomer alcohols, fluorotelorner acids, and short- and long-chain perfluorinated acids in water and biota. Journal of Chromatography A, 1093, 89–97.Google Scholar
- UBW (2009). Neue Ergebnisse des PFT-Messprogramms: Werte der Industriechemikalie gehen im Klärschlamm und im Abwasser weiter zurück. Würtemberg: Umweltministerium Baden. http://www.uvm.badenwuerttemberg.de/servlet/is/63509/.
- Vestergren, R., Ullah, S., Cousins, I. T., & Berger, U. (2012). A matrix effect-free method for reliable quantification of perfluoroalkyl carboxylic acids and perfluoroalkane sulfonic acids at low parts per trillion levels in dietary samples. Journal of Chromatography A, 1237, 64–71. doi: 10.1016/j.chroma.2012.03.023.CrossRefGoogle Scholar
- Wang, N., Szostek, B., Folsom, P. W., Sulecki, L. M., Capka, V., Buck, R. C., Berti, W. R., & Gannon, J. T. (2005). Aerobic biotransformation of C-14-labeled 8-2 telomer B alcohol by activated sludge from a domestic sewage treatment plant. Environmental Science and Technology, 39, 531–538.CrossRefGoogle Scholar
- Zhang, W., Zhang, Y., Taniyasu, S., Yeung, L. W. Y., Lam, P. K. S., Wang, J., Yamashita, N., & Dai, J. (2013). Distribution and fate of perfluoroalkyl substances in municipal wastewater treatment plants in economically developed areas of China. Environmental Pollution, 176, 10–17.CrossRefGoogle Scholar