Abstract
AbstractThe effect of CaCO3 and CaSO4 on 0,0‐diethyl 0‐(P‐nitrophenyl) phosphorothioate (parathion) degradation was investigated. The decomposition in dry acid‐washed sand as a relatively inert matrix, as well as in two dry soils, was measured. As shown previously in the case of other Ca‐containing surfaces, both CaCO3 and CaSO4 enhanced parathion degradation in the inert medium. In every soil‐salt mixture the parathion decomposition curves were different. In one soil CaCO3 even slowed down the decomposition. In another soil, CaSO4 enhanced decomposition up to 5% salt concentration, but additional CaSO4 did not produce further enhancement.
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