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یافته کوتاه: ارزیابی بخش های پایدار و ناپایدار فلزات سنگین (Fe, Mn, Cr, Ni) در رسوبات سطحی حوزه جنوبی دریای خزر دو ایستگاه( تنکابن و امیرآباد ) | ||
| مجله علمی شیلات ایران | ||
| مقاله 17، دوره 25، شماره 1 - شماره پیاپی 94، فروردین 1395، صفحه 201-206 اصل مقاله (368.26 K) | ||
| شناسه دیجیتال (DOI): 10.22092/isfj.2017.110234 | ||
| نویسندگان | ||
| رامین زرشناس؛ حسن نصر اله زاده ساروی* ؛ پروین فرشچی؛ شعبان نجف پور | ||
| کلیدواژهها | ||
| فلزات سنگین؛ استخراج پی درپی؛ رسوبات سطحی؛ دریای خزر | ||
| عنوان مقاله [English] | ||
| Assessment of resistance and non-resistance fractions of heavy metals concentration (Fe, Mn, Cr, Ni) in surface sediments from the southern of Caspian Sea of two stations (Tonekabon and Amirabad) | ||
| نویسندگان [English] | ||
| R. Zarshenas؛ H. Nasrollahzadeh Saravi؛ P. Farshchi؛ S. Najafpour | ||
| چکیده [English] | ||
| This study was conducted to determine some heavy metals (Fe, Mg, Cr, Ni) of surface sediment in the southern Caspian Sea during two seasons (Summer and Winter) in 2014-2015. 36 surface sediments samples (with triplicate) were collected at two stations (Tonekabon and Bandar Amirabad). All samples were analyzed using sequential extraction to indicate natural and anthropogenic sources. The results indicated that the percentage of non-resistance fraction in Tonekabon area were measured 3.5,45.0, 22.1 and 6.0 for Fe, Mg,Cr, Ni, respectively and in Amirabad area were 23.0,2.6,1.8 and 4.0, respectively. On the other hand, the percentage of resistance fraction values were obtained 96.5, 55.0, 77.9 and 94.0 in Tonekabon, and 77.0, 97.4, 98.2, and 96.0 in Amirabad region. The chemical speciation of Fe, Mg, Cr, Ni in most sampling stations were in the order of residual> oxidisable-organic > acid-reducible >exchangeable. The order of total concentration, non-resistance and resistance fraction were observed Fe>Mn>Ni>Cr, Mn>Fe>Ni>Cr and Fe>Mn>Ni>Cr, respectively. As a conclusion, results of total concentration, resistnace and non-resistance of Fe, Mn, Ni and Cr were lower than standard and earth shell (Igeo) in this area. This is shown that surface sediments of this area were not polluted with these heavy metals and bioavaiable fraction provides little indication of potential interactions with the biotic components present in this environment. | ||
| کلیدواژهها [English] | ||
| heavy metals, sequential extraction technique, surface sediment, Caspian Sea | ||
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