Micellar Catalyzed Degradation of Fenitrothion, an Organophosphorus Pesticide, in Solution and Soils†

摘要: We report on a study of the decomposition fenitrothion (an organophosphorus pesticide that is persistent contaminant in soils and groundwater) as catalyzed by cetyltrimethylammonium (CTA+) micelles. The CTA micelles were associated with two types counterions:  (1) inert counterions (e.g. CTABr) (2) reactive CTAOH). counterion surfactants used hydroxide anion (HO-) normal nucleophile hydroperoxide (HOO-) pyruvaldehyde oxime (MINA-) α-nucleophiles. reactivity order followed:  CTABr < CTAOH CTAMINA ≪ CTAOOH. Treatment rate data using Pseudo-Phase Ion Exchange (PPIE) model micellar catalysis showed ratio k2M/k2W to be less than unity for all employed. Rather arising from “true catalysis”, we attributed observed enhancements “concentration effect”, where both incorporated into small phase volume. Furthermore, CTAOOH/C...