پديد آورنده :
جليلي، بهيرا
عنوان :
بررسي پاسخ برخي از فرايند هاي چرخه نيتروژن خاك به 3 و 3- دي آمينوبنزيدين
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي
صفحه شمار :
سيزده، 100، [II] ص: جدول، نمودار
يادداشت :
ص.ع. به: فارسي و انگليسي
استاد راهنما :
فرشيد نوربخش
استاد مشاور :
مهران غياثي
توصيفگر ها :
سلامت خاك , پساب كارخانجات , DAB , آلاينده هاي آلي خاك
تاريخ نمايه سازي :
15/1/87
استاد داور :
حسين شريعتمداري، مهدي كديور
تاريخ ورود اطلاعات :
1396/09/07
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتال
چكيده انگليسي :
AbstractNowadays soils and environmental pollution by organic compounds is one of the mainchallenges in soil health Organic contaminants may be toxic to human and soilorganisms and may have some deleterious influences on the environment 3 3 diaminobenzidine DAB is one of the organic contaminants which is usually added tosoils by food and textile industries We hypothesized that DAB can be a potentialinhibitor for soil amidohydrolases urease L asparaginase and L glutaminase and alsoit can be at least partially degraded by soil microorganisms Therefore the objectives ofthis study were to investigate i the effects of DAB concentration on soilamidohydrolases L arginine ammonification and N mineralization and ii thebiodegradation kinetics of DAB in soil Five concentrations of 0 10 25 50 and 100 mgkg 1 DAB were added to two surface soils Shervedan and Jouzdan incubated at 25 Cand 50 water holding capacity for 30 days To study the kinetics on N mineralization two concentrations of 0 and 100 mg kg 1 DAB were added and the soils were incubatedfor 60 days under the optimum conditions The inorganic N was measured destructivelyin 10 different time intervals during the incubation Results indicated that higherconcentrations of DAB reduced the soil biological properties in both soils Thesensitivity index was decreased as the DAB concentration increased from 10 to 100 mgkg 1 L glutaminase showed the greatest sensitivity to DAB among the threeamidohydrolase studied Kinetic behavior of the DAB degradation consistently followedfirst order models in both soils In the first 7 days of the incubation period Nmineralization was adversely influenced by DAB in both soils indicating that DAB hasa toxic effect on the biological process Following the first 7 days of the incubation DAB was started to degrade as the inorganic N concentration was greater in DAB treated soils than those of controls The potentially mineralizable N in DAB treatedsoils was consistently greater than those of control Overall we can clearly concludethat DAB can be a potential toxic organic compound for soil biological activities andthat the rate of toxicity is time dependent
استاد راهنما :
فرشيد نوربخش
استاد مشاور :
مهران غياثي
استاد داور :
حسين شريعتمداري، مهدي كديور
