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:: دوره 15، شماره 3 - ( 1395 ) ::
جلد 15 شماره 3 صفحات 1144-1166 برگشت به فهرست نسخه ها
Distribution pattern of heavy metals in the surficial sediment of Gorgan Bay (South Caspian Sea, Iran)
چکیده:   (4016 مشاهده)

The Gorgan Bay is an important ecosystem receiving discharge from their tributaries. In this study, concentration of Pb, Zn, Ni, Fe, Al, Cu and As was seasonally determined at 22 sampling points during 2012-2013.Sediment samples were collected using a Van Veen grab. The levels of heavy metals were determined by ICP-AES (Inductively Coupled Plasma Atomic Emission Spectrometry) and AAS (Atomic Absorption Spectrophotometer). The percentages of sand, silt, clay and TOM (Total Organic Matter) in the sediment samples were determined (44.4± 15, 53.4 ± 14, and 2.2± 2.2 and 7.2% ± 1.6, respectively). The results showed that range of Al, As, Cu, Fe, Ni, Pb and Zn in the sediment samples were 0.4-2%, 2.6- 8.6 ppm, 8.1-12.4 ppm, 0.9 – 1.2 % , 11.5-16.8 ppm, 5.9-13.6 ppm and 21.8-28.8 ppm, respectively. In spring, both Al and Ni were higher than the guideline level. In the event that arsenic was exceeds the guidelines in summer. In general, according to the results of EF (Enrichment Factor) and PLI (Pollution Load Index) can be concluded, Gorgan Bay is low risk and not contaminated. According to the results of the nmMDS (non-metric Multidimensional Scaling), PCA (Principal Components Analysis) and the map of distribution of heavy metals, it seems Gorgan Bay are divided into two separate zones (the eastern and the western parts).

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نوع مطالعه: پژوهشي | موضوع مقاله: Biology & physiology
دریافت: 1395/5/16 | پذیرش: 1395/5/16 | انتشار: 1395/5/16
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Ghorbanzadeh Zaferani S, Machinchian Moradi A, Mousavi Nadushan R, Sari A, Fatemi S. Distribution pattern of heavy metals in the surficial sediment of Gorgan Bay (South Caspian Sea, Iran). IJFS. 2016; 15 (3) :1144-1166
URL: http://jifro.ir/article-1-2337-fa.html

Distribution pattern of heavy metals in the surficial sediment of Gorgan Bay (South Caspian Sea, Iran). مجله علوم شیلاتی ایران. 1395; 15 (3) :1144-1166

URL: http://jifro.ir/article-1-2337-fa.html



دوره 15، شماره 3 - ( 1395 ) برگشت به فهرست نسخه ها
Iranian Journal of Fisheries Sciences Iranian Journal of Fisheries Sciences
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