First report of geochemical fractionation distribution, bioavailability and risk assessment of potentially toxic inorganic elements in sediments of coral reef Islands of the Persian Gulf, Iran 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Marine pollution bulletin
年/卷/期
2018 / 137 / Dec.
页码
185-197
ISSN号
0025-326X
作者单位
Department of Biomedical and Dental Sciences and of Morphological and Functional Images, University of Messina;Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina;Department of Environmental Sciences, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University;
作者
Ali Ranjbar Jafarabadi;Alireza Riyahi Bakhtiari;Nunziacarla Spanò;Tiziana Cappello;
摘要
Metal contamination is a serious environmental concern in the Middle East. Herein, geochemical fractionation distribution and potential sources of thirteen metals (Fe, Al, Mn, Zn, Cu, Co, Cr, Ni, V, As, Hg, Pb and Cd) were investigated in sediments from ten coral reef Islands in the Persian Gulf, Iran. To properly assess availability and mobility of elements, enrichment factor (EF), pollution load index (PLI), pollution index (PI), contamination index (CI), sediment pollution index (SPI) and ecological risk assessment were provided. Sediment grain size showed an outstanding role in controlling the levels of potentially toxic inorganic elements (PTIEs). The highest values of total organic matter (TOM) were detected in Kharg and Lavan Islands. Different metals fractionation distribution was found across sites. As was noticed in carbonate (F2), exchangeable (F1), Fe-Mn oxy-hydroxide (F3), organic (F4) and residual (F5) fractions, Hg primarily associated with F2and F1, whereas Pb and Cd with F2, followed by F1, F3, F5and F4. Conversely, Ni and V accumulated in F1, suggesting their high mobility and bioavailability, and thus environmental risk to aquatic biota. All metals (except Al, Fe and As) had geological and anthropogenic sources. Based on modified risk assessment analysis, the sediments from Kharg, Lavan, Siri and Lark Islands showed medium adverse effects. Overall, results from this study corroborate that petroleum industry is the main source of pollution of PTIEs in the Persian Gulf, and offer a scientific basis for monitoring and preventing metal pollution in the environment.
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关键词/主题词
Coral reef sediment;Potentially toxic inorganic elements (PTIEs);Fractionation;Bioavailability index;Ecological risk assessment;Persian Gulf;
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