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HERO ID
7299192
Reference Type
Journal Article
Title
Investigating the mechanism of vanadium toxicity in freshwater organisms
Author(s)
Gillio Meina, E; Niyogi, S; Liber, K
Year
2020
Is Peer Reviewed?
Yes
Journal
Aquatic Toxicology
ISSN:
0166-445X
EISSN:
1879-1514
Volume
229
Page Numbers
105648
Language
English
PMID
33130451
DOI
10.1016/j.aquatox.2020.105648
Web of Science Id
WOS:000594707400005
Abstract
Vanadium (V) could present a risk for aquatic organisms from the Alberta oil sands region, if present in high concentrations. An industry pilot project has used petroleum coke (PC) as a sorbent to remove organic toxicants from oil sands process-affected water (OSPW), but it also caused V to leach from PC into the OSPW, reaching concentrations of up to 7 mg V/L (a level known to be toxic to aquatic organisms). Vanadium is a transition metal with several oxidation states, which could potentially elicit its toxicity through either ion imbalance or oxidative stress. This study investigated the effect of V on Daphnia magna and Oncorhynchus mykiss. Daphinds and O. mykiss were exposed to concentrations of V up to their respective calculated median lethal concentration (LC50): 3 mg V/L for D. magna and 7 mg V/L for O. mykiss. For both organisms, the influence of V on sodium flux and whole body sodium was evaluated. Its effect on whole body calcium and the oxidative stress responses in O. mykiss at the gill and liver levels was also studied. Results suggested that 3.1 mg V/L for D. magna and 6.8 mg V/L for O. mykiss caused an overall increase in sodium influx in both the daphnids and rainbow trout. However, concentrations of V ranging between 0.2 and 4 mg V/L for D. magna and 1.8 and 6 mg V/L for O. mykiss reduced whole body sodium in both organisms and whole body calcium in O. mykiss. Concentrations above 3.6 mg V/L caused significant lipid peroxidation in the gills and liver of rainbow trout, while 1.9 mg V/L produced a substantial decrease in the fish gill GSH:GSSG ratio, but no change in the ratio between these thiols in the liver. Concentrations of 6.62 mg V/L sharply increased catalase activity in the liver but not in the gills. Neither liver nor gill superoxide dismutase was altered by V. Overall, results suggest that both ion imbalance and oxidative stress are part of the mechanism of toxicity of V in D. magna and O. mykiss and that further research is warranted to fully elucidate the mechanism(s) of V toxicity in aquatic organisms.
Tags
IRIS
•
Vanadium Compounds - Problem Formulation
Literature Search: Mar 2020 - Jun 2021
PubMed
WoS
Combined data set
Dataset for title/abstract screening
Supplemental (TIAB)
Supplemental material
Mechanistic
Non-mammalian model
•
Vanadium Inhalation
Literature Search: Mar 2020 - Jun 2021
PubMed
WoS
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