Volume 20, Issue 5 (Iranian South Medical Journal 2017)
Iran South Med J 2017, 20(5): 448-469 |
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Haghshenas A, Hatami-manesh M, Mirzaei M, Mir Sanjari M, Hossein Khezri P. Measurement and Evaluation of Ecological Risk of Heavy Metals in Surface Sediments of Pars Special Economic Energy Zone. Iran South Med J 2017; 20 (5) :448-469
URL: http://ismj.bpums.ac.ir/article-1-898-en.html
URL: http://ismj.bpums.ac.ir/article-1-898-en.html
Arash Haghshenas1 
, Masoud Hatami-manesh2 , Mohsen Mirzaei * 3, MirMehrdad Mir Sanjari2 , Parisa Hossein Khezri1
, Masoud Hatami-manesh2 , Mohsen Mirzaei * 3, MirMehrdad Mir Sanjari2 , Parisa Hossein Khezri1
1- Institute of Shrimp, Tehran, Iran
2- Department of Environment Sciences, School of Natural Resources and Environment, Malayer University, Malayer, Iran
3- Environment Group, Institute of Grapes and Raisins, Malayer University, Malayer, Iran , mohsenmirzayi27@yahoo.com
2- Department of Environment Sciences, School of Natural Resources and Environment, Malayer University, Malayer, Iran
3- Environment Group, Institute of Grapes and Raisins, Malayer University, Malayer, Iran , mohsenmirzayi27@yahoo.com
Abstract: (6558 Views)
Background: Nowadays, heavy metals pollution in aquatic ecosystems is one of the most significant global environmental issues. Since these metals have characteristics such as chemical stability, low degradability and bioaccumulation ability.Therefore they can affect the food chain at different levels, causing an abundant ecological risks for bioorganisms. This study investigates the concentration of heavy metals (mercury, cadmium, lead, chromium, copper, nickel, zinc and iron) in coastal sediments and assesses its ecological in the Pars Special Economic Energy Zone in the south of Iran.
Materials and Methods: In order to assess the concentration of heavy metals, 16 stations along the coast were selected and three samples were taken from each station. After preparation and digestion of the samples, the concentrations of these metals were determined by using Polarography method.
Results: The results showed that the order of average amount of total concentration of metals in the sediments were (Fe > Zn> Cu > Ni> Cr > Pb > Cd > Hg), reflected as (56.065 ± 2.04 > 45.91±12.035 > 28.58±1.77 > 18.96 ± 0.84 > 8.59±0.47 > 0.447 ± 0.07 > 0.03 ± 0.016) mg/kg respectively. In addition, assessment of indicators of the environmental factors such as; Geo accumulation index (Igeo), Contamination factor (CF), Pollution Load Index (PLI) represents low to modeate pollution in the region. Also, the risk assessment for ecological and environmental effect of heavy metals revealed the order of (Cd >Cu> Pb> Ni> Zn> Cr> Hg) respectively.
Conclusion: According to the results, the pollution in the region affected by heavy metals was low for Hg, Zn, Cr, Pb and Ni.This effect was moderate for Cd and Cu and was high for adjusted cadmium concentrations a by normal amount in the crust of the Earth.High levels of pollution factor along with adjusted pollution for Cd, Cu implies the effects of human activities on pollution and accumulation of these heavy metals in sediments in the region. Based on the calculation of the ecological risk index of metals we can express that among the measured elements, Cadmium sediments are in moderate ecological risk.
Materials and Methods: In order to assess the concentration of heavy metals, 16 stations along the coast were selected and three samples were taken from each station. After preparation and digestion of the samples, the concentrations of these metals were determined by using Polarography method.
Results: The results showed that the order of average amount of total concentration of metals in the sediments were (Fe > Zn> Cu > Ni> Cr > Pb > Cd > Hg), reflected as (56.065 ± 2.04 > 45.91±12.035 > 28.58±1.77 > 18.96 ± 0.84 > 8.59±0.47 > 0.447 ± 0.07 > 0.03 ± 0.016) mg/kg respectively. In addition, assessment of indicators of the environmental factors such as; Geo accumulation index (Igeo), Contamination factor (CF), Pollution Load Index (PLI) represents low to modeate pollution in the region. Also, the risk assessment for ecological and environmental effect of heavy metals revealed the order of (Cd >Cu> Pb> Ni> Zn> Cr> Hg) respectively.
Conclusion: According to the results, the pollution in the region affected by heavy metals was low for Hg, Zn, Cr, Pb and Ni.This effect was moderate for Cd and Cu and was high for adjusted cadmium concentrations a by normal amount in the crust of the Earth.High levels of pollution factor along with adjusted pollution for Cd, Cu implies the effects of human activities on pollution and accumulation of these heavy metals in sediments in the region. Based on the calculation of the ecological risk index of metals we can express that among the measured elements, Cadmium sediments are in moderate ecological risk.
Keywords: Ecological Risk Assessment, Pollution Load Index (PLI), Sediments, Contamination Factor, Heavy Metals
Type of Study: Original |
Subject:
Public Health
Received: 2016/12/27 | Accepted: 2017/03/6 | Published: 2017/11/13
Received: 2016/12/27 | Accepted: 2017/03/6 | Published: 2017/11/13
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