Experiments show how strong the zeolite adsorption ammonia

   Zeolite on the adsorption of ammonia nitrogen, the effect of hydraulic retention time and pH value on the adsorption effect was discussed. The properties and structure of zeolite before and after adsorption of ammonia nitrogen were also investigated. The results show that the quasi - second - order adsorption kinetic equation can well describe the process of adsorbing ammonia nitrogen by zeolite. The theoretical adsorption value of zeolite in ammonia solution of 1.0 g / L is 8.69 mg · g-1. The optimum hydraulic retention time of zeolite adsorbed ammonia nitrogen was 40 min, the optimum pH value was 6, and the removal rate of ammonia nitrogen decreased with the increase of concentration, and increased with the increase of zeolite dosage. Zeolite adsorption ammonia nitrogen before and after the morphology and structure did not change, the specific surface area, pore volume, pore size was significantly reduced.

   Ammonia nitrogen is an important oxygen-consuming substance in water, which is a pollutant that causes water eutrophication. In recent years, with the increase in social production levels, ammonia nitrogen emissions are increasing. As the water pollution incidents occur frequently, a serious threat to the daily work of the community, for more serious areas of water pollution, the gradual implementation of more stringent standards to control the discharge of ammonia nitrogen in sewage, many sewage treatment plants face a serious situation to improve the standard. Therefore, in the balance of economic conditions to improve processing efficiency, has become the focus of the study. At present, the domestic solution to the high concentration of ammonia nitrogen pollution mainly use blow-off method, biological method, ion exchange method. Which blows easily lead to secondary pollution, biological conditions require high, slow response, and ion exchange method easier to control. Natural zeolite is an alkali or alkaline earth metal aluminosilicate mineral, is composed of silicon tetrahedron and aluminum oxide tetrahedron composed of silicate, with a large surface area, good adsorption performance, ion exchange ability , Chemical stability and so on. Zeolite has a good effect on the removal of ammonia nitrogen, and it is a kind of promising water treatment method because of its abundant reserves and low cost. The zeolite adsorption ammonia nitrogen with more attention.