Number 35 Volume 10

Open Access Article

1 - The Effect of Land Use on the Distribution of Chemical Forms of Copper and Cobalt, and their Biological Risk Assessment in Soils of Zanjan Province
Ali Afshari Parisa Alamdari

This study aimed to determine the chemical forms of cobalt and copper in soil under rain fed and irrigated cultivation and their biological risk assessment in Zanjan province. For this purpose, 120 samples (96 rain fed soil samples and 24 soil samples irrigated) were ta More

This study aimed to determine the chemical forms of cobalt and copper in soil under rain fed and irrigated cultivation and their biological risk assessment in Zanjan province. For this purpose, 120 samples (96 rain fed soil samples and 24 soil samples irrigated) were taken and after determination concentration of all the elements, 36 samples with maximum variation were selected for laboratory analysis. The results showed that the concentrations of total and DTPA-extractable cobalt under rain fed and irrigated land uses for Co were 25.6, 0.35 and 24.3 and 0.39 and for Cu were 29.8, 2.1 and 62.3, 5.2 mg/kg respectively. Copper distribution in the rain fed soil included residual fraction (74.2%), oxide fraction (10.5%), organic matter fraction (8.4%), carbonate fraction (4.6%) and soluble+exchangeable fraction (4/2%) and in irrigated soil included residual fraction (70%), organic matter (13.1%), oxide (10.1%), carbonate (4.4%) and soluble+exchangeable (2.3%). Chemical distribution of cobalt in soils showed no significant difference in the proportion of each fraction in order of residual fraction>oxidized>carbonate>soluble+exchangeable>organic fraction achieved. The highest correlation coefficient was found between bound to organic matter fraction of Cu with organic matter (r=0.731). Individual contamination factors (ICF) for copper and cobalt in rain fed and irrigated conditions were 0.35 and 1.11 and 0.50 and 1.28 respectively. Global contamination factor (GCF), under rain fed and irrigated were 1.46 and 1.78 respectively. Risk assessment code (RAC) for copper and cobalt was 6.9 and 27.24% respectively. Manuscript profile

Open Access Article

2 - Environmental Geochemistry of Zarjoob River in Rasht City (Guilan Province)
Zahra Bahari Chahardah Shahroz Haghnazar

  Zarjoob River is located in north of Iran, Guilan province, Rasht city limits. During the study, the water and sediments of Zarjoob River were sampled in 5 places. According to geochemical studies on sediment and water of Zarjoob River it was found that there is More

  Zarjoob River is located in north of Iran, Guilan province, Rasht city limits. During the study, the water and sediments of Zarjoob River were sampled in 5 places. According to geochemical studies on sediment and water of Zarjoob River it was found that there is no environmental contamination in river's sediment but the analysis of river's water shows that the existence of elements of Cadmium, Cobalt, Mercury, Manganese, Nickel and Zinc in all samples of water specially in Rasht industrial city region and Golsar Bridge to Pirbazar are more than WHO standard and water standard of Iran. These elements' concentration changes process is affected by the arrival of urban- domestic and industrial wastewater. The concentration of these elements along the river (before, inside, and after Rasht city) has irregular changes. The amount of BOD of river's water in all stations except in one of them is more than the standard in Iran and it is due to the arrival of industrial, domestic and hospital wastewater along the river. The amount of COD in all stations is more than the water standard of Iran which is approximately 30 times more than the standards in Golsar region to Pirbazar and this indicates very severe water contamination in river. Heavy metals existed in international water enter the body of fish and other aquatic animals and they are accumulated in their body. Also the accumulation of heavy metals in plants' tissue finally enters food chain which could be the reason of developing gastrointestinal cancer and endocrine diseases in Guilan province. Manuscript profile

Open Access Article

3 - Investigation and measurement of Radon gas concentration in soil air overlying of Quchan Fault
AliReza Mehrab

In this study, we tried to radon gas efficiency, as one of the signs before the earthquake are examined. Ghoochan fault activity in the past has been associated with large earthquakes, the results of which have brought a lot of damage. In order to check the activities a More

In this study, we tried to radon gas efficiency, as one of the signs before the earthquake are examined. Ghoochan fault activity in the past has been associated with large earthquakes, the results of which have brought a lot of damage. In order to check the activities and emission of radon fault, the fault Ghoochan as well as seismic activity survey to determine the emission of radon was chosen direction. After preliminary studies, depending on parameters such as population density in some parts of the fault, Then, summing up the results of the fault which has the highest population density and seismic risk is Choose and to determine emission of radon in the fault zone was studied. When were determined that due to the type and texture of soil gradation balance is not deep fault zone access. So continue sampling depth is limited to 0.5 meters above soil level. The following zoning exposure to radon in soil samples 75 points determine the portion of the fault zone. Payam Mashhad analyzed in the environmental laboratory and the results are presented in a separate analysis. The results of this study showed that: the fault between the output of large quantities of radon 67-11260) Bq/m3(Ready great earthquake. And also on the part of the fault zone was possible. Manuscript profile

Open Access Article

4 - Ultimate pit limits determination of Sarcheshmeh Coppor Mine based on risk free valuation criterion for accsess to sustainable development
Afshin Akbari Omid Mohammadi

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Open Access Article

5 - Landslide hazard zonation using Weigthed density area and AHP Fuzzy method )case study: Chamsangar watershed(
Siamak Baharvand Salman Sori

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Open Access Article

6 - Water resources of Astaneh city and studying effective factors on it with statistical, graphical methods and GIS
Mohammad Dordi Mahmoodi AliReza Moradian Harehdasht Ataollah Nadiri

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Open Access Article

7 - Evaluation of environmental aspects in the construction of dams
Mojtaba Rahimi Shahid Nima Rahimi

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