3784

3575

كارشناسي ارشد

خاكشناسي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1386

يازده، 143، [II] ص: مصور ،جدول، نمودار، عكس

ص.ع.: به فارسي و انگليسي

محمد علي حاج عباسي، امير حسين خوشگفتارمنش

مجيد افيوني، خورشيد رزمجو

2/10/86

حسين شريعتمداري، نورالله ميرغفاري

مهندسي كشاورزي

ID3575

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

AbstractSoils and environmental pollution by total petroleum hydrocarbons TPHs is one of themost important environmental challenges in Iran especially around oil refineries like theTehran oil refinery complexes Presence of petroleum contaminants in soils may be toxicto human and organisms and act as a source of ground and surface waters contamination Also there are serious concerns regarding the presence of TPH in soil especially becauseof their potential for bioaccumulation in organism s food chain Therefore remediationof these compounds from environment is necessary There are many techniques forremediation of petroleum contaminated soils but some of them are high cost and haveside effects on environment therefore nowadays bioremediation technologies such asphytoremediation removal of soil contaminants via plant growth are investigated In thisstudy phytostimulation was used as an environmentally and economically acceptableoption to remediate petroleum contaminated soils At first germination and subsequentgrowth of seven plants were tested in three soils with different petroleum contaminationlevels Contamination treatments consisted of C0 uncontaminated soil C1 and C2treatments 1 1 and 1 3 w w uncontaminated contaminated soil respectively Thereafter four plant genotypes with the highest germination and growth were selectedfor phytoremediation trails The results showed that the presence of TPH in the soil hadno effect on seed germination of agropyron white clover sunflower and safflower Incontrast there were 32 and 56 decreases in germination of puccinellia in the C1 and C2treatments respectively Canola and white clover seedlings were sensitive to thesecompounds and failed to produce dry matter yield at the end of trial period Therefore four plant genotypes including tall fescue agropyron safflower and sunflower wereselected for the phytoremediation trails In the phytoremediation study shoot and root drymatter yield of all studied plants significantly reduced in the contamination treatments particularly C2 treatment as compared to the control C0 treatment Also microbialactivity in the rhizosphere of agropyron was greater than tall fescue in the C2 treatment However there were no significant differences in the microbial activity in therhizosphere of sunflower and safflower with the control Decreases of the TPHconcentration in the presence of the plant genotypes were variant There were 71 and69 decreases in TPH concentration in C1 treatment and 45 and 42 decreases in TPHconcentration in C2 treatment in the presence of agropyron and tall fescue respectively Also the sunflower had no significantly effect on contaminant removal at the end of thetrail period Although advanced studies for assessing the suitability of plant species andimproving phytoremediation efficiency is necessary in this study agropyron is suggestedfor phytoremediation of investigated petroleum contaminated soils

محمد علي حاج عباسي، امير حسين خوشگفتارمنش

مجيد افيوني، خورشيد رزمجو

حسين شريعتمداري، نورالله ميرغفاري