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HERO ID
3981684
Reference Type
Journal Article
Title
Riverine inputs and source tracing of perfluoroalkyl substances (PFASs) in Taihu Lake, China
Author(s)
Ma, X; Shan, G; Chen, M; Zhao, J; Zhu, L
Year
2018
Is Peer Reviewed?
1
Journal
Science of the Total Environment
ISSN:
0048-9697
EISSN:
1879-1026
Volume
612
Page Numbers
18-25
Language
English
PMID
28846903
DOI
10.1016/j.scitotenv.2017.08.235
Web of Science Id
WOS:000413313700003
Abstract
The occurrence, riverine inputs and sources of perfluoroalkyl substances (PFASs) in Taihu Lake, one of the largest lakes in China, were investigated by measuring PFASs including the isomers of perfluorooctanesulfonate (PFOS), perfluorooctanoate (PFOA) and perfluorohexanesulfonate (PFHxS) in the Lake and its main flow-in rivers. It was found that PFHxS, instead of PFOS or PFOA, was predominant both in the Lake and rivers (45.9-351ng/L), reflecting increasing demand of PFHxS in recent years. The riverine flux of PFASs into the Lake was estimated to be 1255kg/year. The percentage of linear (n-) PFOS and the ratio of 3+5m-/1m-PFOS were combined to indicate indirect source due to biodegradation of PFOS-precursors. The percentage order of n-PFOS was: the Lake (48.7%)
the rivers (8.99)>ECF (electrochemical fluorination) product (6.76). These suggested that degradation of PFOS-precursors made distinct contribution to PFOS load in the waters, particularly in the Lake. The Lake and river waters had a consistent proportion of n-PFHxS (89.0%), which was slightly lower than the ECF product (96.0%), indicating it was mainly due to the release from production and application of PFHxS as an active ingredient.
Keywords
Perfluoroalkyl substances; Isomers; Taihu Lake; Flow-in rivers; Flux
Tags
PFAS
•
Additional PFAS (formerly XAgency)
•
Expanded PFAS SEM (formerly PFAS 430)
Perfluorooctane
•
^Per- and Polyfluoroalkyl Substances (PFAS)
PFOA (335-67-1) and PFOS (1763-23-1)
Literature Search – Adverse outcome pathway (2015-present)
Pubmed
•
PFAS 150
Literature Search Update December 2020
PubMed
Literature Search August 2019
PubMed
Not prioritized for screening
Perfluorohexanesulfonic acid
Perfluorooctanesulfonate
Perfluorooctanesulfonic acid
•
PFHxS
Database searches
Pubmed
Toxline
WOS
Scopus
Excluded
TiAb
•
PFOA (335-67-1) and PFOS (1763-23-1)
Literature Search – Adverse outcome pathway (2015-present)
Pubmed
Screening Results
Excluded/Not on Topic
Literature Search Update (2013-2019)
PubMed
WOS
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