5742

5357

كارشناسي ارشد

خاكشناسي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1389

چهارده،143ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

مجيد افيوني، شمس الله ايوبي

علي رضا سفيانيان، محمد مهدي مجيدي

23/1/90

امير حسين خوش گفتار منش، بهروز مصطفي زاده

مهندسي كشاورزي

ID5357

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Investigation Source Heavy Metal and Determine Risk Assessment for Health Human in Surface Soil of Hamadan Province Hossein Kheirabadi kheirabadi@ymail com Data submission March 7 2010 Department of Soil Science Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc language Farsi M Afyuni Prof Supervisor Afyuni@cc iut ac ir SH Ayuobi Assoc Prof Supervisor Ayuobi@cc iut ac ir Abstract Soil pollution and accumulation of heavy metals in crops are the most important bioenvironmental problems that threaten the life of plants animals and humans Limited information is available on concentration of heavy metals in soil and crops in Hamadan province The objective of this research was to determine the source of heavy metals in soil their concentrations in crops and risk assessment for human in Hamadan province A total of 286 composite surface soil samples 0 20 were collected The soil sampling locations were determined using a GPS and land use of each sampling location was recorded A total of 150 plant samples consisting of 39 wheat SN 28 potato 21 barely 13 corn and 47 alfalfa were collected from the croplands through the province Selected soil properties including pH electrical conductivity organic matter cation exchange capacity and texture were measured Total Zn Pb Cu Cr Co and Ni were extracted using HNO3 Total content of heavy metals were measured by ICP Plant available concentration of the metals was extracted using DTPA solution and measured by AAS Total Concentration of the heavy metal in plant was determined by ICP Multivariate geostatistical analysis was performed to identify the source of the heavy metals Cobalt Cr and Ni are associated with parent material and correspond to the first factor termed the lithologenic component Both Zn and Pb appear in the second factor which is likely due to anthropogenic influences The third factor was mainly attributed to Cu This factor is likely due to both human activities and natural influences The metals concentrations showed that the levels often exceed the guideline established by the Netherlands Ninety seven percent of samples had Ni concentrations that exceed the Netherlands guideline Likewise the concentration of Cu Cr and Zn exceeded the Netherlands guideline in 48 35 and 1 of the study sites respectively A signification correlation was found between total and available concentration of the heavy metals A signification correlation was found between Cr Ni and Cu with clay and silt No significant relationship was found between the total concentration of heavy metal and the soil pH and EC Mean concentration of Cr in potato tuber were above the acceptable limit recommendation by WHO but other heavy metal were lower Individual metal THQ values indicate the relative absence of non cancer health effects associated with intake of a single metal through consumption of either potato or wheat The THQ for all the population groups via consumption of potato and wheat was smaller than 1 0 which shows low possibility of any obvious risk Hazard index HI values for girls and boys via consumption of potato and wheat were 0 81 and 0 78 respectively adult men and women were 0 52 and 0 61 respectively and senior men and women were 0 52 and 0 6 respectively The HI values were lower than 1 for all the age groups indicating that it was still safe for the general population of Hamadan Province to consume potato and wheat Keywords Heavy metal multivariate analysis anthropogenic activities lithologenic hazard index crops Hamadan

مجيد افيوني، شمس الله ايوبي

علي رضا سفيانيان، محمد مهدي مجيدي

امير حسين خوش گفتار منش، بهروز مصطفي زاده