Biochemistry
; Cadmium
; Extraction
; Geochemistry
; Heavy metals
; Lead
; Nickel
; Risk assessment
; Sediments
; Surficial sediments
; Zinc
; Caspian sea
; Geochemical speciation
; Oxide compounds
; Pollution load indices
; Sequential extraction technique
; Source identification
; Speciation
; Surface sediments
; Copper
; arsenic
; cadmium
; chromium
; cobalt
; copper
; lead
; metal
; nickel
; vanadium
; zinc
; heavy metal
; water pollutant
; bioavailability
; concentration (composition)
; extraction method
; geochemistry
; heavy metal
; marine pollution
; oxide
; sediment pollution
; speciation (chemistry)
; Article
; bioavailability
; Caspian Sea
; concentration (parameters)
; controlled study
; environmental parameters
; extraction and extracts
; five step sequential extraction
; geochemical analysis
; Iran
; oceanic regions
; pollution load index
; pollution transport
; risk assessment
; sea pollution
; sediment
; surface sediment
; analysis
; bioavailability
; chemistry
; environmental monitoring
; procedures
; sediment
; water pollutant
; Caspian Sea
; Biological Availability
; Environmental Monitoring
; Geologic Sediments
; Metals, Heavy
; Risk Assessment
; Water Pollutants, Chemical
Scopus学科分类:
Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要:
Geochemical speciation of As, Cd, Co, Cr, Cu, Ni, Pb, V and Zn were determined in the surface sediments of the southern Caspian Sea. A five-step sequential extraction technique was used to determine the chemical forms of metals. Mean concentrations (ppm) of heavy metals were (mean���S.D.) As: 9.94���1.71, Cd: 0.87���0.23, Co: 14.85���2.80, Cr: 72.29���19.48, Cu: 18.91���4.48, Ni: 32.87���5.25, Pb: 12.48���3.22, V: 86.07���20.71 and Zn: 66.85���10.11. Among the metals, Cu, As, Pb and Zn exhibited relatively higher mobility, while Cd, Co, Cr, Ni and V were found mainly in the residual fractions. Cu and As showed the highest percentages in the exchangeable phase while Co and Cr had the lowest percentages in the phase. The Risk Assessment Code (RAC) values indicated that As, Cu and V had medium risk at some sampling sites. According to pollution load index (PLI), sediments from some sampling sites were polluted. � 2016 Elsevier Ltd
Iranian National Institute for Oceanography and Atmospheric Science (INIOAS), No. 3, Etemadzadeh St., Fatemi Ave., Tehran, Iran; Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, Iran; Department of Environmental Science, Faculty of Environment and Energy, Science and Research Branch, Islamic Azad University, Tehran, Iran; Department of Fisheries, Faculty of Animal Science and Fisheries, Sari Agricultural Sciences and Natural Resources University, Km 9 Darya Boulevard, P.O. Box, 578, Sari, Iran; Department of Agriculture and Natural Resource, Ardakan University, Ardakan, Iran; Department of Marine Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran; Novin Shimyar Chemical Laboratory, P.O. Box 14589-3699, Tehran, Iran; Department of Marine Biology, Shahid Chamran University, Ahvaz, Iran
Recommended Citation:
Bastami K.D.,Neyestani M.R.,Esmaeilzadeh M.,et al. Geochemical speciation, bioavailability and source identification of selected metals in surface sediments of the Southern Caspian Sea[J]. Marine Pollution Bulletin,2017-01-01,114(2)