Effect of redox potential on the heavy metals binding phases in estuarine sediment: Case study of the Musa Estuary.

Autor: Madadi R; Environmental Research Laboratory, School of Civil Engineering, Iran University of Science and Technology, Tehran, Iran. Electronic address: reyhane.madadi96@gmail.com., Kachoueiyan F; School of Environment, College of Engineering, University of Tehran, Tehran, Iran. Electronic address: fatemehkachoueiyan@gmail.com., De-la-Torre GE; Biodiversity, Environment, and Society Research Group, San Ignacio de Loyola University, Lima, Peru. Electronic address: gabriel.delatorre@usil.pe.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2023 Oct; Vol. 195, pp. 115565. Date of Electronic Publication: 2023 Sep 22.
DOI: 10.1016/j.marpolbul.2023.115565
Abstrakt: Heavy metals (HMs) exist in various chemical forms in marine sediments, and environmental factors like the redox potential (Eh) can affect labile-bound HMs, harming aquatic life and human health. This study utilized the Tessier sequential extraction to investigate how Eh affects the binding forms of elements, including Cd, Co, Cu, Ni, Pb, Zn, Fe, and Mn. The results revealed that decreasing Eh from 120 to 50 mV resulted in the release of weakly bound forms of Cd, Co, Ni, Pb, and Zn into the water, some of which were re-adsorbed by the residual fraction as Eh decreased further to -150 mV. Manganese was consistently bound to FeMn oxides, while Cu and Fe were predominantly associated with the more stable binding phase. Based on EF, I geo , and CF, sediment was only polluted by As nearby an industrial zone, while water pollution indices indicated significant HMs contamination in all water samples.
Competing Interests: Declaration of competing interest The authors state that they do not have any known conflicting financial interests or personal relationships that may seem to have influenced the work reported in this study.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: