酸化碱渣对氨氮的吸附和解吸性能

研究了氨氮质量浓度、体系温度、时间、酸化碱渣溶液的pH等对酸化碱渣吸附氨氮性能的影响，比较了作为解吸剂的蒸馏水和NaCl溶液对氨氮的解吸效果。在选定的实验条件下，酸化碱渣对氨氮的最大吸附量可达13．9mg／g。氨氮吸附量随其质量浓度的增加而增大、随体系温度的升高而降低，酸化碱渣溶液的pH对吸附性能的影响可以忽略。酸化碱渣表面吸附作用力主要为偶极间力和氢键力，吸附过程可用一级动力学方程模拟。NaCl溶液对氨氮的解吸效果好于蒸馏水，最大解吸率为25．7％。

Adsorption and Desorption of Ammonia-Nitrogen on Acidified Alkaline Residue

The influencing factors on the adsorption of ammonia-nitrogen onto acidified alkaline residue were studied, such as mass concentration of ammonia-nitrogen, system temperature, time and pH of the acidified alkaline residue solution. The effects of distilled water and NaCI solution using as strippant on desorption of ammonia-nitrogen were compared. In the chosen experimental conditions, the maximum adsorption quantity of ammonia-nitrogen on acidified alkaline residue is 13.9 mg/g. And the adsorption quantity of ammonia-nitrogen is increased with the increasing of its mass concentration and the decreasing of system temperature, while the effect of pH can be ignored. The adsorption forces on the surface of acidified alkaline residue are mainly dipole bond force and hydrogen bond force. The adsorption process can be simulated by the first order kinetic equation. The desorption effect of NaCI solution on ammonia-nitrogen is better than that of distilled water, with 25.7% of the maximum desorption efficiency.