苯酚在干污泥上的吸附性能研究

Adsorption of Phenol on Dried Activated Sludge

采取实验方法,以城市污水处理厂剩余污泥为原料制取干污泥作为吸附剂,研究了其在不同温度下对苯酚的吸附行为。结果表明,干污泥对苯酚的吸附在30℃温度下吸附速率最快,吸附过程遵循二级吸附动力学模型,并且Lagergren一级速率方程也可以较好地描述干污泥对苯酚的吸附;25℃时,干污泥对苯酚的吸附行为用Langmuir模型描述时相关性最好,其方程式为G=909.091×0.0031Ce/(1+0.003 1Ce),其最大吸附量为909.091 mg.g-1,k=0.0031。

Adsorption of phenol at different temperatures by dried activated sludge, made from the material of discarded activated sludge of municipal wastewater treatment plant, was studied. The results showed that at temperature 30℃, the adsorption speed was the biggest and uptake process of the phenol has proven to follow the second - order kinetic model, and could be described by the first - order Lagergren equation. Our experiments indicated that at temperature 25 ℃, the adsorption isotherms fitted with the Langmuir equation. Additionally, the adsorption kinetic equation was G = 909. 091 × 0. 003 1Ce/（ 1 ＋ 0. 003 1 Ce）, and the greatest adsorption amount was 909. 091 mg· g^-1 , k =0. 003 1, respectively.