8371

7752

كارشناسي ارشد

علوم خاك

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1392

يازده،78ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

محمدعلي حاج عباسي

مژگان سپهري

15/10/92

فرشيدنوربخش، بهرام شريف نبي

مهندسي كشاورزي

ID7752

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Effect of sewage sludge on reduction of petroleum hydrocarbons by maize inoculated with Piriformospora indicia in a calcareous soil Aboozar Asadolahi a asadolahi@ag iut ac ir Date of Submission September 9 2013 Department of Soil Sciences Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiSupervisors Mohammad Ali Hajabbasi Hajabbas@cc iut ac irAbstract Phytoremediation is a promising technique for reclamating petroleum contaminated soils Phytostimulation is an important mechanism involved in degradation of petroleum hydrocarbons viastimulating microorganisms in the root zone In this study the effect of sewage sludge application ondegradation of petroleum hydrocarbons contaminated soil was investigated The experimental soil wascollected from a petroleum contaminated site around the Isfahan Oil Refinery Complex Bakhtiardasht 32 48 N 51 32 E The soil had been contaminated by the leachates of the complex during severalyears of activity The initial soil total petroleum hydrocarbon TPH concentration was approximately3700 mg kg 1 Municipal sewage sludge was prepared from Northern Waste Water Refinery of Isfahan Shahinshahr Township The experiment was set up as completely randomized design in a factorialexperiment Three different levels of sewage sludge applied to the soil 0 S0 2 S1 and 5 S2 percent w w for 2 months in a controlled conditions greenhouse with maize Zea mays L inoculated withPiriformospora indica P2 without P indica P1 and no plant P0 Seeds were germination in anincubator and were inoculated in sterile conditions Buds were planted in plastic pots having about 3 kgsoil in three replicates and microbial respiration was tested in 3 10 17 24 31 38 45 55 65 and 75 daysafter the treatments At the end of the experiment TPH microbial respiration and dry weight of root andshoot were measured The results showed that the sewage sludge level 2 and 5 had positive significant P 0 01 effects on root and shoot dry matter compared to the no sludge Application of sewage sludgeimproved microbial respiration and resulted in faster TPH dissipation especially in the presence of theplants Over time hydrocarbon decomposition rate increased but removed of T2 and T4 treatmentsoccurred more rapidly However the rate of T4 and T6 treatments reduced so that the difference is notsignificant Degradation of petroleum hydrocarbons in the second month was much higher than the othertimes and the maximum degradation occurred at T6S2 treatment Keywords Oil pollution maize Zea mays L Piriformospora indica sewage sludge

محمدعلي حاج عباسي

مژگان سپهري

فرشيدنوربخش، بهرام شريف نبي