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HERO ID
4239595
Reference Type
Journal Article
Title
Bioaccumulation and effects of novel chlorinated polyfluorinated ether sulfonate in freshwater alga Scenedesmus obliquus
Author(s)
Liu, W; Li, J; Gao, L; Zhang, Z; Zhao, J; He, X; Zhang, X
Year
2018
Is Peer Reviewed?
Yes
Journal
Environmental Pollution
ISSN:
0269-7491
EISSN:
1873-6424
Volume
233
Page Numbers
8-15
Language
English
PMID
29049944
DOI
10.1016/j.envpol.2017.10.039
Web of Science Id
WOS:000424177000002
Abstract
Chlorinated polyfluorinated ether sulfonate (Cl-PFESA) is a novel alternative compound for perfluorooctane sulfonate (PFOS), with its environmental risk not well known. The bioaccumulation and toxic effects of Cl-PFESA in the freshwater alga is crucial for the understanding of its potential hazards to the aquatic environment. Scenedesmus obliquus was exposed to Cl-PFESA at ng L-1to mg L-1, with the exposure regime beginning at the environmentally relevant level. The total log BAF of Cl-PFESA in S. obliquus was 4.66, higher than the reported log BAF of PFOS in the freshwater plankton (2.2-3.2). Cl-PFESA adsorbed to the cell surface accounted for 33.5-68.3% of the total concentrations. The IC50 of Cl-PFESA to algal growth was estimated to be 40.3 mg L-1. Significant changes in algal growth rate and chlorophyll a/b contents were observed at 11.6 mg L-1and 13.4 mg L-1of Cl-PFESA, respectively. The sample cell membrane permeability, measured by the fluorescein diacetate hydrolyzation, was increased by Cl-PFESA at 5.42 mg L-1. The mitochondrial membrane potential, measured by Rh123 staining, was also increased, indicating the hyperpolarization induced by Cl-PFESA. The increasing ROS and MDA contents, along with the enhanced SOD, CAT activity, and GSH contents, suggested that Cl-PFESA caused oxidative damage in the algal cells. It is less possible that current Cl-PFESA pollution in surface water posed obvious toxic effects on the green algae. However, the bioaccumulation of Cl-PFESA in algae would contribute to its biomagnification in the aquatic food chain and its effects on membrane property could potentially increase the accessibility and toxicity of other coexisting pollutants.
Keywords
Polyfluorinated compounds; Alga; Bioaccumulation; Membrane property; Oxidative stress
Tags
PFAS
•
Additional PFAS (formerly XAgency)
•
Expanded PFAS SEM (formerly PFAS 430)
Litsearch: September 2019
PubMed
Not prioritized for screening
Perfluorooctane
•
PFAS 150
Literature Search Update December 2020
PubMed
Literature Search August 2019
PubMed
Not prioritized for screening
Perfluorooctane
Perfluorooctanesulfonic acid
•
PFNA
Litsearch Update 2017-2018
Toxline
Literature Search
Toxline
PFNA May 2019 Update
Toxnet
Title and Abstract Screening
Excluded
Not relevant to PECO
•
PFOA (335-67-1) and PFOS (1763-23-1)
Literature Search Update (2013-2019)
PubMed
WOS
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