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Geochemistry and ecological risk assessment of the coastal Tajan River using sediment quality indices (Southern Caspian Sea, Iran).

Authors
  • Gharibreza, Mohammadreza1
  • Masoumi, Hamidreza2
  • 1 Soil Conservation and Watershed Management Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran. , (Iran)
  • 2 Department of Geology, Bandar Abbas Branch, Islamic Azad University, Bandar Abbas, Iran. Electronic address: [email protected] , (Iran)
Type
Published Article
Journal
Marine pollution bulletin
Publication Date
Dec 01, 2021
Volume
173
Issue
Pt B
Pages
113154–113154
Identifiers
DOI: 10.1016/j.marpolbul.2021.113154
PMID: 34823160
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The present study aimed to reveal correlations between environmental events and geochemistry variation and ecological risks of the coastal Tajan River. Sediment quality indices (Cf, Cd, Er, and RI) were applied to achieve the research objectives based on the concentration of toxic metals (As, Cd, Cr, Cu, Ni, Pb, Zn). The probably effective level is based on the concentration of As, Cr, and Ni observed. The coastal zone and the urban sector of the river have experienced a moderate ecological risk since 1975, especially during wet seasons (1988-1997) with a mean sedimentation rate of 2 cm/year. A significant correlation (r=0.439-0.633, p-values < 0.0001) between the toxic metal concentration and the Caspian Sea level fluctuation was obtained. The lowest concentration of toxic metals coincided with the high stand water level. Management practices recommend controlling toxic metals (As, Cd, Ni, Cr, Pb) from the sources and dredging of retention pounds along the Tajan River. Copyright © 2021 Elsevier Ltd. All rights reserved.

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