پديد آورنده :
زينلي بهزادان، حميد
عنوان :
تجزيه ميكروبي ضايعات لاستيك هاي فرسوده در خاك و تاثير آن بر جذب عناصر سنگين توسط ذرت و آفتابگردان
مقطع تحصيلي :
كارشناسي ارشد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان،دانشكده كشاورزي
صفحه شمار :
سيزده، 98ص.: مصور، جدول، نمودار
يادداشت :
ص.ع. به فارسي و انگليسي
استاد راهنما :
اميرحسين خوش گفتارمنش، مهران شيراني
استاد مشاور :
مژگان سپهري
توصيفگر ها :
تجزيه زيستي تاير , كود زيستي روي , تلقيح ميكروبي , ضايعات تاير
تاريخ نمايه سازي :
22/1/91
استاد داور :
حسين شريعتمداري، قدرت اله سعيدي
تاريخ ورود اطلاعات :
1396/10/10
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
AbstractIn this research study we tested the possibility of using some biological treatments to hasten the degradation ofwaste tire rubber in soil and thus the release of zinc and sulfur A zinc deficient calcareous soil was collected for theexperiment from Rudasht research field in Isfahan province central Iran and three rates of ground tire rubber 0 150 and 300 mg kg were incorporated into the soils The ground rubber was applied as 0 6 mm diameter particles The Zn addition from the 150 and 300 mg kg 1 rubber was estimated 3 0 and 6 0 mg Zn kg soil Ground rubbercontains very low levels 0 64 g g 1 of Cd Before adding to the soil ground rubber was exposed to fourmicrobial treatments including no inoculation inoculation with R erythropolis inoculation with R erythropolis E coli and inoculation with R erythropolis E coli A calcoaceticus The inoculums used on the zero rubbertreatment were the same amount 5 106 cells ml as added to the rubber before it was mixed with the soil in therubber treatments The soils were incubated at 250C and their moisture was kept at 70 field capacity usingdeionized water Sub samples of soil were collected from each treatment at 1 3 6 and 10 weeks after inoculationand soil pH and DTPA extractable concentrations of Zn Pb Cu Fe and Cd were measured Results showed thatapplication of ground tire rubber and microbial inoculation treatments caused reduction of soil pH and themagnitude of this reduction was increased over time Addition of ground rubber in combination with microbialinoculation caused an increase in DTPA extractable soil Zn and Fe The increase in the DTPA extractable Zn and Feof rubber amended soils was increased over time so that the highest concentration of available Zn and Fe was foundat week 10 The microbial inoculation of soils by itself decreased pH and increased DTPA Zn and Fe The highestdecrease in soil pH and increase in soil available Zn and Fe was achieved by application of 300 mg kg ground tirerubber inoculated with R E A After 10 weeks the extractable Cd and Pb concentrations in all un amended andrubber amended soils were below the detection limit of AAS The result of the present study showed that theinoculation of ground rubber with the rubber biodegrading bacteria species was effective to hasten the increase inDTPA extractable Zn and Fe in the studied calcareous soil The best microbial and rubber treatment of the firstexperiment was selected for the second experiment pot experiment Corn and sunflower were cultivated in 2 kgpots and 60 days after seeding they were harvested Shoot and root dry weight and the concentration of iron copper lead and cadmium was measured Results showed that microbial inoculation of rubber powder increased zinc andiron concentration in plant shoots Adding of rubber powder alone increased the shoot concentration of zinc while ithad no effect on shoots iron concentration Key words Ground tire rubber Calcareous soil Zn fertilizer R erythropolis E coli A calcoaceticus
استاد راهنما :
اميرحسين خوش گفتارمنش، مهران شيراني
استاد مشاور :
مژگان سپهري
استاد داور :
حسين شريعتمداري، قدرت اله سعيدي
