Micro-phyto Combined Remediation On Petroleum-heavy Metals Contaminated Soil

With the increasing volume of oil production and oil pollutionworsening, the repair of oil-contaminated soil to become the focus of currentresearch. Repair oil pollution mainly physical remediation, chemicalremediation and bioremediation. Physical Chemistry repair method costs onthe soil environmental perturbations and easy destroy soil ecology, thebioremediation method has a low cost, no secondary pollution, etc., andtherefore attention has been paid. Micro-phyto combined remediation is theuse of the environment in the plant a significant role in promoting the growthof microorganisms, microbial degradation of oil pollutants. The heavy metalpollution is widespread in the oil-contaminated soil will affect the toxiceffects of heavy metals on Micro-phyto combined-the role of plants in soilbioremediation. Therefore, the Micro-phyto combined effects of oil-heavymetals contaminated soil remediation research is of great significance.In this study, in order to improve biodegradation efficiency ofPetroleum-Heavy Metals Contaminated pollution soil.we use Micro–phytocombined remediation, as Dongying City, Shandong Province, the Gudaoregion typical Petroleum-Heavy Metals Contaminated pollution study, Toefficient petroleum degrading bacteria and plants combined effects ofcompound pollution of Petroleum-Heavy Metals Contaminated pollution.petroleum hydrocarbon degradation rate, calculated by measuring soilmicrobial activity, research in heavy metal composite petroleumcontaminated soil heavy metal toxicity, plants, as well as the impact of theamendments on the microbial degradation capacity, in this paper the mainpurposeThe main conclusions are as follows(1) Add oil degrading microbial remediation of petroleum contaminated60dys later soil petroleum hydrocarbon degradation rate is significantly higher than the soil microbial processing Cd contaminated soil after theaddition of microbial oil degradation rate increased to44.27%from17.86%,Ni contaminated soil oilthe degradation rate increased from16.08%to44.03%, significantly improve the degradation of petroleum hydrocarbons inthe soil. The same time, add the oil degrading microorganisms significantlyenhanced microbial activity in the soil microbial biomass and soildehydrogenase activity were significantly increased, microbial processing ofsoil microbial activity is higher than without adding microbial treatment ofthe soil, add15days of soil dehydrogenase activity25.98%higher thanmicrobial microbial microbial biomass carbon microbial43.76%higher thannon-microbial（2）In the the microbial remediation process, the oil degradation rate ofchange over time, without adding microbial treatment and adding microbialtreatment experiments, the trend is to increase, the highest rate ofdegradation in the15day, and then slowly smaller degradation rate at60daystabilized(3) The toxic effects of heavy metals on microorganisms cause soilmicrobial activity decreased, microbial biomass carbon and soildehydrogenase activity with the heavy metal concentrations increase andreduce, making biodegradable oil in the soil microbial degradation ofpetroleum hydrocarbon pollutants decreased, showing a petroleumhydrocarbon degradation rate also increases with the concentration of heavymetals and decrease.(4) Micro-phyto combined remediation on polluted soil, petroleumhydrocarbons degradation rate significantly higher than the microbialdegradation of oil pollutants alone Micro-phyto combined remediation repair60days later Cd contaminated soil petroleum hydrocarbon degradation rate,higher than the microbial degradation; Ni contaminated soil petroleumhydrocarbon degradation rate, higher than the microbial degradation.(5) Soil ameliorants applied amount, significantly affect the microbial degradation of the oil. soil ameliorants dosage20g/kg soil microbial biomassand dehydrogenase activity was significantly increased, petroleumhydrocarbon degradation rate also significantly increased microbialremediation of Cd contaminated soil petroleum hydrocarbon degradation rateincreased from45.20%to55.96%, Ni contaminated soil petroleumhydrocarbon degradation rate increased to57.09%from49.97%.(6) Micro-phyto combined remediation of contaminated soil, theappropriate amount of soil ameliorants to improve soil, can promote thebiodegradation of petroleum contaminants in the soil. And do not add themodifier soil ameliorants dosage20g/kg contrast Micro-phyto combinedremediation, joint repair Cd contaminated soil petroleum hydrocarbondegradation rate increased from54.91%to62.37%, Ni contaminated soilpetroleum hydrocarbon degradation rate increased from58.33%to64.93%.