土壤中的氧化锰对酚类化合物的氧化降解作用

本文研究了砖红壤和红壤中的氧化锰对１０种有毒酚化合物的氧化降解作用及氧化锰与酚化合物之间的氧化还原动力学，结果表明，土壤中氧化锰对某些有毒酚化合物具有氧化降解作用，各种酚化合物氧化降解的难易与其本身性质和分子结构有关。土壤中的氧化锰的还原溶解和氢醌的卖化均符合一级反应动力学方程。介质ｐＨ的降低有利于反应的进行，两种土壤中的氧化锰不溶解反应对（Ｈ＾＋）的级数为０．１６，氢醌除与氧化锰发生氧化还原反应

OXIDATIVE DEGRADATION OF PHENOLIC COMPOUNDS BY MANGANESE OXIDES IN SOILS

Oxidative degradation of 10 phenolic compounds by manganese oxides in latosol and red soil and the kinetics of redox reaction between manganese oxides in soils and phenolic compounds were studied. The reactivity of phenolic compounds with manganese oxides in soils depended on their nature and structure and increased with decreasing pH. Both reductive dissolution of manganese oxides in soils by phenolic compounds and oxidation of hydroquinone by manganese oxides in soils followed the kinetic equation of the first order reaction. The order of the reaction of reductive dissolution of manganese oxides in soils with respect to [H⁺] was 0.16. Besides oxidation by manganese oxides in soils, hydroquinone was possibly adsorbed by soils and so on, and total reaction rate of hydroquinone was composed of and so on, and total reaction rate of hydroquinone was composed of two terms, i.e.the oxidative rate and other reaction rate.