title: Geochemical partitioning and pollution assessment of Ni and V as indicator of oil pollution in surface sediments from Shadegan wildlife refuge, Iran.
abstract: The total concentrations and chemical partitioning of Ni, V and Fe have been assessed in surface sediments from 160 sites along the Shadegan wildlife refuge. The results showed that the average total level of Ni, V and Fe in surface sediments were 45.08±12.09, 25.25±20.8 and 25,979.01±6917.91μg/g dw, respectively. On the average, the chemical speciation of Ni, V and Fe in most stations were in the order of residual>oxidisable-organic>acid-reducible>exchangeable. In all fractions, the residual was accounted the highest proportion for the metals analyzed. Among the non-residual phases, the proportion of heavy metals in organic matter fraction was higher than other phases collected from all locations. The comparison between measured values in this study and some fresh water sediment quality guidelines indicated that the levels of nickel would be expected to sporadically cause harmful biological impacts on biota in the Shadegan wildlife refuge.
authors.affiliation: Department of Environmental Science, Science and Research Branch, Islamic Azad University, Tehran, Iran. Electronic address: b.haidari@srbiau.ac.ir.
authors.forename: Behnam Heidari
authors.initials: BH
authors.lastname: Chaharlang
authors.affiliation: Department of Environmental Sciences, Faculty of Natural Resource and Marine Science, Tarbiat Modares University, P.O. Box 46414-356, Noor, Mazandaran, Iran. Electronic address: riahi@modares.ac.ir.
authors.forename: Alireza Riyahi
authors.initials: AR
authors.lastname: Bakhtiari
authors.affiliation: Department of Soil Science, College of Agriculture, Shahrekord University, Shahrekord, Iran. Electronic address: jahan.mohammad@ymail.com.
authors.forename: Jahangard
authors.initials: J
authors.lastname: Mohammadi
authors.affiliation: Department of Environmental Science, Faculty of Environment and Energy, Science and Research Branch, Islamic Azad University, Tehran, Iran. Electronic address: parvinfarshchi@gmail.com.
authors.forename: Parvin
authors.initials: P
authors.lastname: Farshchi
mesh_terms: D004784:Environmental Monitoring / Q000379:methods; D019015:Geologic Sediments / Q000032:analysis*; D007492:Iran; D007501:Iron / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis; D009532:Nickel / Q000032:analysis*; D059392:Petroleum Pollution / Q000032:analysis*; D014639:Vanadium / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D053833:Wetlands
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D014639:Vanadium; D009532:Nickel; D007501:Iron
keywords: Fractionation; Iran; Sequential extraction; Shadegan wildlife refuge; Surface sediments