Migration and transformation characteristics of heavy metals during incineration of oily sludge
In order to clarify the influence of mineral compounds on the migration and transformation of heavy metals during the incineration of oily sludge,this paper took the oily sludge from the tank bottom of Shengli Oilfield as the research object,and conducted incineration experiments with the addition of CaO,Fe2O3,Al2O3,and MgO using a horizontal tube furnace.The total amount,leaching characteristics and risk analysis of heavy metals in the obtained incineration bottom ash were carried out respectively.The results showed that minerals indicated good adsorption effect on heavy metals during incineration,and CaO exhibited the best adsorption effect on Cu,Cr,Pb and As with a residual rate of 93.40%for Cu.Different mineral compounds were found different inhibition effects on heavy metal leaching.In general,Al2O3 had the strongest inhibition effect on the leaching characteristics of Cr,Zn,Pb,As and Cd with leaching rates of Zn,Pb,and As all below 5%.The impact of minerals on the risk of heavy metals was no strong regularity.CaO and Al2O3 had a significant effect on reducing the risk of Zn and As with the bioavailable content of Zn and As both below 18%.
oily sludgeincinerationmineral compoundsheavy metalmigration and transformation
万方数据
维普
