VERTICAL DISTRIBUTION OF TRACE METALS IN NATURAL SOIL HORIZONS FROM JAPAN PART 2: EFFECTS OF ORGANIC COMPONENTS IN SOIL

摘要: The association of Al, Mn, Fe, Ba, Zn, Cr, Ni, Co and Pb withsoil organic matter (SOM) was investigated in three Japanesesoils. Organically bound metals were assayed by elementalanalysis a fraction extracted with acidified hydrogenperoxide (H2O2) the humic acid withalkaline reagent, from soil sampled at various depths solums.A Dystric Cambisol showed higher extractability acidifiedH2O2 for most than Humic Andosol an Orthic Acrisol. A had more associated humicacid other two soils.Cu high H2O2 andalso significant acid, while showedhigh but itsassociation relatively low among metalsinvestigated. As is highly resistant to weathering,retention Cu SOM may last longer that Pb.The binding probably has contributed theaccumulation some organic-rich shallow horizons soil. Such Cu, Ni Cambisol,Cu Andosol, Arisol.