Mutagenicity assessment downstream of oil and gas produced water discharges intended for agricultural beneficial reuse.
Ecotoxicology
Emerging pollutants
Energy-water-food nexus
Oil and gas
Produced water
Whole effluent toxicity
Journal
The Science of the total environment
ISSN: 1879-1026
Titre abrégé: Sci Total Environ
Pays: Netherlands
ID NLM: 0330500
Informations de publication
Date de publication:
01 May 2020
01 May 2020
Historique:
received:
26
11
2019
revised:
22
01
2020
accepted:
24
01
2020
pubmed:
6
2
2020
medline:
9
4
2020
entrez:
5
2
2020
Statut:
ppublish
Résumé
Produced water is the largest waste stream associated with oil and gas operations. This complex fluid contains petroleum hydrocarbons, heavy metals, salts, naturally occurring radioactive materials and any remaining chemical additives. In the United States, west of the 98th meridian, the federal National Pollutant Discharge Elimination System (NPDES) exemption allows release of produced water for agricultural beneficial reuse. The goal of this study was to quantify mutagenicity of a produced water NPDES release and discharge stream. We used four mutation assays in budding yeast cells that provide rate estimates for copy number variation (CNV) duplications and deletions, as well as forward and reversion point mutations. Higher mutation rates were observed at the discharge and decreased with distance downstream, which correlated with the concentrations of known carcinogens detected in the stream (e.g., benzene, radium), described in a companion study. Mutation rate increases were most prominent for CNV duplications and were higher than mutations observed in mixtures of known toxic compounds. Additionally, the samples were evaluated for acute toxicity in Daphnia magna and developmental toxicity in zebrafish. Acute toxicity was minimal, and no developmental toxicity was observed. This study illustrates that chemical analysis alone (McLaughlin et al., 2020) is insufficient for characterizing the risk of produced water NPDES releases and that a thorough evaluation of chronic toxicity is necessary to fully assess produced water for beneficial reuse.
Identifiants
pubmed: 32014773
pii: S0048-9697(20)30454-X
doi: 10.1016/j.scitotenv.2020.136944
pmc: PMC7243347
mid: NIHMS1584860
pii:
doi:
Substances chimiques
Gases
0
Mutagens
0
Oils
0
Water Pollutants, Chemical
0
Water
059QF0KO0R
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
136944Subventions
Organisme : NIGMS NIH HHS
ID : R35 GM119788
Pays : United States
Informations de copyright
Copyright © 2020 Elsevier B.V. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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