title: Preliminary evaluation of heavy metal contamination in the Zarrin-Gol River sediments, Iran.
abstract: The major objectives of the study were to test the hypothesis of the Zarrin-Gol River as a reference site for ecotoxicological studies and to assess the contamination degree of heavy metals and metalloids in the river using four contamination indices. For these purposes, eleven heavy metal and metalloid concentrations were analyzed. The average concentrations (mgkg-1) in the sediments were: 37.67 (chromium) 286.28 (manganese), 13,751.04 (iron), 8.79 (cobalt), 12.39 (nickel), 32.68 (zinc), 21.91 (arsenic), 40.59 (selenium), 2923.86 (aluminum), ND (silver) and 785.96 (magnesium). Contamination factor, enrichment factor, pollution load index, and geoaccumulation index were calculated to evaluate the contamination degree and influence of human activities on heavy metal levels. The contamination indices of the sediment samples showed that arsenic and selenium were the highest pollutants. The results indicated that the Zarrin-Gol River could not be used as a reference site at least for arsenic and selenium.
authors.affiliation: Department of Environmental Sciences, Hakim Sabzevari University, 379 post box, 9617916487 Sabzevar, Khorasan Razavi, Iran. Electronic address: h.malvandi@hsu.ac.ir.
authors.forename: Hassan
authors.initials: H
authors.lastname: Malvandi
mesh_terms: D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000032:analysis*; D007492:Iran; D019216:Metals, Heavy / Q000032:analysis*; D045483:Rivers; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical
keywords: Contamination factor; Enrichment factor; Heavy metals; Pollution load index; Sediment; Zarrin-Gol River