Effect of Redox Potential on Manganese Transformation in Waterlogged Soil
Effect of Redox Potential on Manganese Transformation in Waterlogged Soil
复制标题
氧化还原电位对淹水土壤中锰转化的影响
作者：
W. Patrick;F. Turner
当充气土壤受涝时，锰很容易从不溶的氧化形式还原为微溶的还原形式。与氧和硝酸盐的消失一起，土壤溶液和阳离子交换复合体中锰离子(Mn++)的增加是内涝造成的条件减少的第一个可测量的影响之一。虽然在淹水土壤中锰化合物的还原和溶解是众所周知的，但在还原过程中，关于土壤中各种形式的锰的分布的信息很少。在受涝土壤中，氧化锰化合物转化为还原形式所需的还原强度的实验数据尤其缺乏。本报告研究了不同形态的锰在淹水土壤中的分布以及氧化还原或氧化还原电位对这些转化的影响。
MANGANESE reduction from insoluble oxidized forms to slightly soluble reduced forms occurs readily when an aerated soil is waterlogged. Together with the disappearance of oxygen and nitrate, an increase in the manganous ion (Mn++) in the soil solution and on the cation exchange complex is one of the first measurable effects of reducing conditions caused by waterlogging. Although reduction and solution of manganese compounds in waterlogged soils are well known, little information is available about the distribution of various forms of manganese in the soil as reduction processes take place. Experimental data are especially lacking on the intensity of reduction required for conversion of oxidized manganese compounds to reduced forms in waterlogged soils. This report deals with the distribution of the various forms of manganese in waterlogged soils and the effects of the oxidation-reduction or redox potential on these transformations.