Fractionation of heavy metals in bottom sediments in Chahnimeh 1, Zabol, Iran

被引：0
作者：
Safoura Javan
Amir Hessam Hassani
Ahmad Gholamalizadeh Ahangar
Jaber Soltani
机构：
[1] Islamic Azad University,Department of Environmental Science, Faculty of environment and energy, Tehran Science and Research Branch
[2] Islamic Azad University,Department of Environmental Engineering, Faculty of environment and energy, Tehran Science and Research Branch
[3] University of Zabol,Department of Soil Science, Faculty of Soil and Water
[4] University of Tehran,Department of Water Engineering, Abureyhan Campus
来源：
Environmental Monitoring and Assessment | 2015年 / 187卷
关键词：
Heavy metals; Sequential extraction; Sediments; Chahnimeh; Zabol; Iran;
D O I：
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中图分类号：
学科分类号：
摘要：
In the present study, 180 sediment samples were collected from the Chahnimeh 1 reservoir to investigate the concentration of metal and sequential extraction. Five geochemical phases (exchangeable fraction, carbonate fraction, Fe/Mn oxide fraction, organic fraction and residual fraction) for the determination of the speciation of heavy metals (Zn, Fe, Cd, Pb, Mn, Ni) as proposed by Tessier was applied to sediments collected from Chahnimeh1. Results were obtained for nickel and cadmium, as over 40 % of metal was present in the exchangeable phase and bound to carbonate. According to the risk assessment code (RAC), sediments that have 31 to 50 % carbonate and exchangeable fraction are high risk. Similar results were obtained for zinc and lead. The major fraction of the two metals (63 % of the total concentration for lead and 85 % of the total concentration for zinc) occurred in the residual phase and fraction-bound hydrous Fe-Mn oxides. The risk assessment showed moderate risk for lead and no risk for zinc. This indicates that the Igeo and IPOLL used in the present investigation showed no pollution to moderate pollution in terms of metals in sediments.
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