Iron minerals in urban soils

摘要: Technogenically contaminated urban soils contain a substantial amount of magnetite Fe3O4, whereas another ferrimagnetic, i.e., maghemite αFe2O3, more often prevails in unpolluted soils. The content may exceed the iron oxide, hematite, In town Chusovoi, where emissions from single enterprise, metallurgical plant, predominate among pollutants, upper soil horizons are with one type. much larger city Perm, polluting sources diverse, which results wide variation magnetic susceptibility technogenic magnetite. difference properties depend on composition and heavy metals associated this mineral. A considerable oxalate-soluble technogenically produces two important consequences. Schwertmann’s criterion Feox: Fedit as gleying index turns out to be overestimated and, therefore, does not work second consequence is that Tamm’s reagent inapplicable extracting bound amorphous compounds On other hand, high solubility (30–60%) by oxalate favors use for complete extraction (hydr)oxides them.