A First Report of Perfluroalkyl Substances (PFASs) In A Large West Flowing River In Southern India

Binu, K R and Balakrishna, K and Yamashita, Nobuyosh and Guruge, Keerthi S and Prabhasankar, V.P and Praveenkumarreddy, Yerabham (2017) A First Report of Perfluroalkyl Substances (PFASs) In A Large West Flowing River In Southern India. In: DIOXIN, 20/08/2017, Vancouver, Canada.

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Perfluoroalkyl substances have found widespread use in polymers and surfactants since the 1950s [1]. Since a decade, these substances are recognized as an environmental contaminant, as studies have shown that it could affect the growth of infants and toddlers if ingested. In recent years, India is undergoing rapid industrialization and economic development resulting in the increased use of PFASs. This study reports the first quantitative measurements of major PFASs in the largest west flowing river in Southern India, River Periyar (5398 km2 area, 300 km length). This river is also the primary drinking water source of several towns in Kerala state. The sampling of the river water was performed at 16 stations from its source to mouth, its estuary and its main tributaries, in May 2013. Samples were subjected to solid phase extraction through Oasis® HLB wax cartridges and measured through HPLC MS/MS. Recoveries of 13C labeled standards ranged from 60-100%. Out of six major PFASs analyzed, three perfluoroalkyl sulfonates (PFSAs) and three perfluoroalkyl carboxylic acids (PFCAs) were detected in the study area and concentration varied according to point source of contamination. The presence of perfluorobutanoic acid (PFBA), perflurooctanoic acid (PFOA) and perfluorononanoic acid (PFNA) were observed in all sampling stations across the entire stretch of the river and its tributaries. The PFBA concentrations ranged from 58-2174 ng L-1, whereas PFOA concentrations were ranging from 22- 1503 ng L-1 and PFNA 20- 705 ng L-1. Maximum concentrations (as high as 12,958 ng L-1 for PFOS) were observed near the Periyar estuary which is suspected to receive these contaminants from the surrounding industrial effluents. The amount of PFAS ultimately reaching the Arabian Sea was calculated for the Periyar river and compared with other published reports on Ganga and Yamuna rivers in India. Compared to these rivers, the PFAS flux to the ocean from Periyar river was negligible

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Pfas, periyar river
Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 13 Dec 2017 10:19
Last Modified: 13 Dec 2017 10:19
URI: http://eprints.manipal.edu/id/eprint/150236

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