Assessment of Organophosphorus Pesticide Residues in Water and Sediment Collected from the Southern Caspian Sea

Reza Golshani, Ghasem Ghorbanzadeh Zafarani, Maksim Rebezov, Samaneh Karbalaei, Tony R. Walker

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Pollution of water resources by uncontrolled pesticide use is a serious health and environmental issue. In this study, concentrations of three organophosphorus pesticides (diazinon, malathion, and azinphos-methyl) in water and sediment samples from five estuaries (Sefidrud, Chalus, Babolrud, Tajan, and Gorganrud) along the Caspian Sea were investigated. Samples were collected from surface water and sediment during summer to autumn, and pesticides were analysed by gas chromatography-mass spectrometry (GC-MS). Results indicated that salinity and turbidity in Gorganrud were higher (salinity: range 2–8%; turbidity: range 1–9%) compared to other stations. Higher diazinon (water: 0.08±0.06, sediment: 0.04±0.01), malathion (water: 0.09±0.06, sediment: 0.05±0.01) and azinphos-methyl (water: 0.1±0.08, sediment: 0.06± 0.02) concentrations were observed in the Tajan river compared to other stations. Mean concentrations of diazinon, malathion and azinphos-methyl pesticides were higher in the summer compared to the autumn. Azinphos-methyl concentrations were higher than sediment quality guidelines (SQGs), which warrants ongoing monitoring. Our research provides insights into the presence of organophosphate pesticides (OPs) in rivers that enter into the Caspian Sea. Further work to better understand the environmental pollution of OPs in the Caspian Sea is ongoing.

Original languageEnglish
Pages (from-to)18-31
Number of pages14
JournalApplied Environmental Research
Volume44
Issue number2
DOIs
Publication statusPublished - Apr 1 2022

Bibliographical note

Funding Information:
The authors acknowledge laboratory support provided by Department of Environment Tehran, Iran.

Publisher Copyright:
© 2022, Chulalongkorn University - Environmental Research Institute. All rights reserved.

ASJC Scopus Subject Areas

  • General Environmental Science

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