Lixivition Investigation Of Heavy Metal Cu,Pb,Zn,Cd In Municipal Solid Waste Incineration Fly Ash

In the present city life garbage disposal methods, burning down becomes the main method for that it could be able to better realize the reducing of volume, harmless and turning to resources. In our country, garbage was not precisely sorted which contained much harmful heavy metal matter. The end products of the incineration are ash (bottom ash and fly ash) and flue gas. The fly ash is the primary carrier of the heavy metals and their compounds. The final disposal of the fly ash is to landfill or to be used as construction material. The side effect is that by corrade and erode action, the metals especially the volatilizable ones would stand a good chance to re-enter the environment and then do harm to the balance of the nature. Different lixiviations when they are in different environment status. Analyzing the lixivition of heavy metals in municipal solid waste incineration fly ash, could research the transfer action of heavy metals in municipal solid waste incineration fly ash, accordingly offers science thereunder for disposition and using of fly ash.This paper takes incinerator flash ash of Jinan harmless processing factory as sample. Heavy metals were distilled by three different method. study its rule. Emphases study distill by vitriol-nitric acid,and study the lixiviations of heavy metals Cu,Pb,Zn,Cd by different S/N. Through this sdudy, it have litte impact of lixiviations by different S/N, simultaneity,pH have mostly impact lixiviations of heavy metals.The lixiviations of Cu increase when the size fraction increase, the lixiviations of Pb increase when the size fraction increase, and the lixiviations of Zn decrease when the size fraction increase, the lixiviations of Cd is 0 when pH is 5.5, It has little effecetion by S/N.This paper use BCR method to extract different fraction of heavy metal Cu,Pb,Zn, The results shows that the contents of extracted heavy metal Cu,Pb,Zn in fly ash are higher, the other forms are lower, the contents of various heavy metals are not the same when the size fraction are.