Influence of organic material addition on the variation of Cd activity in submerged soils

摘要: A red soil (pH 4.46) and a fluvo-aquic 7.10) were submerged incubated under nitrogen coverage for 60 days with the addition of clover straw in order to elucidate controlling mechanism on Cd activity flooded soils. The reductive dissolution iron oxides resulted decline pe+pH Fe redistribution solid phase, which led transformation low fractions. Following flooding organic material (OM) addition, strongly affected by decrease variation pH For treated OM, rise caused Exc-Cd soluble lower than control (CK). In contrast, soil, OM higher CK as result simultaneous pH. both soils, had only minor influence Org-Cd phase. However, dissolved matter (DOM) enhanced complexation solution.