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Citation Information

Type Journal Article - Environmental Science and Pollution Research
Title Perfluoroalkyl substances in soils around the Nepali Koshi River: levels, distribution, and mass balance
Volume 21
Issue 15
Publication (Day/Month/Year) 2014
Page numbers 9201-9211
URL http://www.usask.ca/toxicology/jgiesy/pdf/publications/JA-790.pdf
Perfluoroalkyl substances (PFASs) were analyzed
in surface soils along the Koshi River in Nepal, a typical
agricultural country with little industrialization and urbanization.
Sixteen target PFASs were quantified in soils from a hilly
region in central and eastern Nepal, but only ten PFASs were
detected. Concentrations of total PFASs ranged from nd (below
the detection limit) to 1.78 ng/g dw. The predominant
PFASs in soils were perfluoro-octanoic acid (PFOA) and
perfluoro-butanesulfonate (PFBS) with concentrations that
ranged from nd to 0.26 ng/g dw and nd to 0.38 ng/g dw,
respectively. Results of mass balance analysis also revealed
weak associations among concentrations of PFASs, extractable
organic fluorine (EOF), and total fluorine (TF). PFASs
were relatively evenly distributed among locations.

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