7085

6627

كارشناسي ارشد

آلودگي هاي محيط زيست

اصفهان: دانشگاه صنعتي اصفهان، دانشكده منابع طبيعي

1390

سيزده، 85ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

منصوره ملكيان

نوراله مير غفاري

25/7/91

مجيد افيوني، مصطفي تركش

1396/09/20

كتابنامه

منابع طبيعي

مهندسي منابع طبيعي

ID6627

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Mercury Bio accumulatio in the Organs of Birds from Some Regions of Isfahan Provice Zahra Hosseinpour Mohammadabadi z hosseinpoormohammadabadi@in iut ac ir Date of Submission 29 2 2012 Department Natural Resources Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor mansoureh malekianAbstractMercury is one of the heavy metals that enter the environment through natural and anthropogenic processes Birds have been used as biological indicators for mercury contaminations in the environment due to theirdirect contact to aquatic environments for water and food and birds are particularly useful as bioindicatorsofpollution because they are often high in the food chain In birds organs including liver and kidney are bestto show the presence of mercury and these organs accumulate the mercury through time Feathers havebeen also used to show the mercury contaminations In this study bio accumulation of mercury in birds inthree organs including liver kidney and hyperpnoea at three sites in Isfahan was investigated Fortysamples of birds from Landfyl Shahin Shahr wastewater treatment area and Zayandehrood River werecollected in winter 1389 and spring 1390 These regions supports diverse ecosystems and biota in need ofremediation and protection and metal data from these regions is needed Biometric measurements wereconducted on the samples samples dried in the oven and then the amount of mercury was measured afterdigestion twice by atomic absorption spectroscopy The SPSS software Version 16 was utilized to analyzedata Mercury levels in the liver kidney and hyperpnoea were 8 to 68880 ppb 0 to 7817 ppb and 0 to 8978 ppbrespectively Amount of mercury in these three organs without significant differences was hyperpnoea liver kidney According to the results in these three organs Zayanderod samples showed morecontaminations than other sites The lowest mercury levels were recorded in vegetarian birds The averagemercury value in liver was 1543 ppb which is less than the amount of mercury 125 49 ppm which cancause death in birds The average value in kidney was 1284 ppb and less than the amount of mercury 5 13ppm which can cause nephron toxicity However four samples of aquatic and animal consumers showedmore mercury than the above The average value obtained for hyperpnea was 2002 2 ppb less than theamount of mercury 5 ppm which reported harmful for health and reproduction of birds However in fivesamples of Zayandehrood mercury was recorded more than this value The average amount of mercury inthe three organs was correlated to body weight It seems that although these values in all organs were lessthan legal values these mercury values in Zayandehrood River are alarming More research in this area isrecommended to understand the mercury resources and its accumulation processes in the environment Theaverage mercury value in breast feather was 2061 25 ppb that mercury level was 296 to 5934 ppb Keywords bio accumulation mercury birds liver kidney hyperpnea Isfahan

منصوره ملكيان

نوراله مير غفاري

مجيد افيوني، مصطفي تركش