5608

5242

كارشناسي ارشد

محيط زيست

اصفهان: دانشگاه صنعتي اصفهان، دانشكده منابع طبيعي

1389

سيزده،125ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

عليرضا سفيانيان، نوراله مير غفاري

مجيد افيوني

15/10/89

حسين خادمي، حميدرضا كريم زاده

مهندسي منابع طبيعي

ID5242

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Spatial Distribution of Cadmium Zinc and Vanadium in Surface Soil and their Accumulation in Some Crops of Hamadan Province Amin Golshahi Email address a golshahi@na iut ac ir August 31 2010 Department of Environmental Science Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Persian Dr A Soffianian and Dr N Mirghafari soffianian@cc iut ac ir and mnorolah@cc iut ac ir Abstract There is a world concern in relation to hazards of heavy metals in the environment Soil pollution by heavy metals can directly or indirectly affect the health of organisms Increasing heavy metals concentration in soil likely cause the increase of their entrance to plants As a result their accumulation especially in crops will be dangerous for human health The aim of this study is to determine the spatial distribution of cadmium Cd zinc Zn and vanadium V in soils of Hamadan province pollution assessment of soil potato wheat barley alfalfa and corn and the investigation of the health risk in the crops Surface soil samples 0 20 cm were collected by random systematic method The concentration of heavy metals and some soil properties including pH EC and percentage of organic matter sand silt and clay were determined Satellite images were used to find out soil sampling points located on the agricultural lands and samples of potato wheat barley alfalfa and corn were collected The Kriging method precision of different models was compared using Mean Absolute Error MAE and Mean Bias Error MBE The method with higher precision was selected to mapping of heavy metals in the soil The background concentration of both Cd and V as well as Zn were calculated by median and Index of Geochemical Distribution IGD respectively Soil pollution status was also determined using Index of Geochemical Load IGL Heavy metals Transfer Factor TF from soil to plants were calculated to identify their accumulations in the crops The health risk potential of heavy metals in the wheat and potato were assessed with Health Risk Index HRI The results showed that the concentrations of studied elements in the soil were in the natural range and were lower than the maximum acceptable concentration for plant toxicity Cd Zn and V concentrations in the plants were lower than their toxicity The Exponential model of disjunctive Kriging and Gaussian model of simple Kriging were shown higher precisions for both Cd and V and Zn respectively Overlay of soil heavy metals spatial distribution geology and land use maps were shown that Cd concentration depends to geology and agriculture In addition to parent material agriculture play an important role in Zn enrichment of soil The geology was major factor to control the concentration of V in soil According to IGL only 10 soil samples located on the agricultural lands were considered as polluted The highest TF was observed for Cd in potato demonstrating that the high accumulation Based on the HRI the consumption of wheat and potato containing Cd and Zn didn t have risk for human health but the consumption of wheat could have significant risk due to existence of V Keywords Hamadan Province heavy metals soil pollution kriging crops health risk

عليرضا سفيانيان، نوراله مير غفاري

مجيد افيوني

حسين خادمي، حميدرضا كريم زاده