Stability behavior of soil colloidal suspensions in relation to sequential reduction of soils: II. Turbidity changes by submergence of paddy soils at different temperatures

摘要: Abstract Flocculation and dispersion of colloidal particles nine inorganic paddy soils were studied mainly based on turbidity measurements the suspensions which previously incubated at 28°C under in vitro waterlogged conditions. After 1-week incubation, except for 1) two containing larger amounts sodium salts 2) one soil Fe Al oxides, significantly decreased, flocculated with a decrease Eh an increase electric conductivity (EC). During 3- to 4-week period waterlogging, three increased EC pH although remained low. Infrared (IR) absorption analysis showed that suspended consisted layer silicates from respective clays. Oxidation by air-bubbling led increa...