论文部分内容阅读
研究了不同p H值条件下紫色土对NH4+的吸附/解吸性能。结果表明:3种p H值的紫色土对NH4+的吸附量和解吸量均随着加入NH4+浓度的增大而增大,其中p H值为6.0的紫色土的最大吸附量是10.3 mg/g,最大解吸量是7.96 mg/g;p H值为7.2的紫色土的最大吸附量是12.8 mg/g,最大解吸量是4.62mg/g;p H值为8.0的紫色土的最大吸附量是13.5 mg/g,最大解吸量是2.23 mg/g。Freundlich方程能很好地描述紫色土对NH4+的等温吸附动力学过程,其R值均在0.95以上。该研究表明紫色土对NH4+的吸附属于不均匀表面的多分子层吸附。
The adsorption / desorption properties of NH4 + by purple soil under different p H values were studied. The results showed that the adsorption and desorption amounts of NH4 + increased with the increase of NH4 + concentration in purple soil with three p H values. The maximum adsorption capacity of purple soil with p H of 6.0 was 10.3 mg / g , The maximum desorption amount was 7.96 mg / g; the maximum adsorption capacity of purple soil with pH 7.2 was 12.8 mg / g and the maximum desorption capacity was 4.62 mg / g; the maximum adsorption capacity of purple soil with pH value of 8.0 was 13.5 mg / g, the maximum desorption amount is 2.23 mg / g. The Freundlich equation can well describe isothermal adsorption kinetics of purple soil to NH4 + with R values above 0.95. The study shows that purple soil NH4 + adsorption belongs to the uneven surface of the multi-layer adsorption.