南方土壤硫酸根吸附解吸影响因子研究

Study on Affecting Factors of Soil Sulfate Adsorption-Desorption Process in South China

采用固相组分连续提取和单独组分分析相结合的方法，研究了有机质、活性氧化物、晶态氧化物等土壤固相组成分在南方土壤硫酸根吸附解吸中所起的作用．研究表明，活性氧化物在土壤硫酸根吸附中起主要作用，是土壤硫酸根的主要吸附体；在高浓度时晶态氧化物对硫酸根的潜在吸附能力也会表现出来；有机质在硫酸根吸附解吸中所起的作用较为复杂，一般情况下。

The properties of sulfate adsorption-desorption by soils in South China were studied by means of equilibrium test. Four soils collected from four provinces were tested. Na2 SO4 was added in a series of nine concentrations as adsorption solution, while deionized water, NaNO3 and NaH2PO4 were used as desorption solution. By the method of eliminating four sets of the three components, namely organic matter, active oxide and free oxide, their roles in soil sulfate adsotption-desorption were studied. It was proved that activated oxides were the main adsorption minerals, free oxides would play some roles in high sulfate concentration, organic matters usually play positive roles in sulfate adsorption and montmorillonites play particular positive roles in sulfate adsorption in soils of South China.