A, The zeolite has strong absorption of ammonia, which after the pretreatment of hydrochloric acid activated by industrial salt and roasted etc can remove minim ammonia in water in order to make the tap water with super standard ammonia accord to the national standard of table-water. And the zeolite modified by different techniques can also remove fluorin and arsenic in tap water. The water after treatment can reach the national standard for table-water, which will be a new method to resolve the problem of highly fluoridized water. Otherwise, by means of adjusting the ratio of silicon and aluminum. The zeolite can remove the residual chlorine, manganese, iron and excess heavy metal.
B, Some part of the municipal sewage after secondary treatment even doesn't reach the national standard. Under this circumstance, the content of nitrogen, phosphorus and heavy metal etc in sewage after secondary treatment can decrease effectively with the filtration of modified zeolite. For example, galvanized water discharged from some enterprises with secondary treatment in which the content of heavy metal can't reach the standard for discharge, can remove the pollutants in order ro reach the standard with treatment of modified zeolite and by ions exchange.
C, Activated zeolite used with activated carbon can fill the gap that zeolite removes organics poorly, and remove the residual fluorin, arsenic, manganese and soluble inorganic salt etc at the same time. The combination exploits fully adsorption of them and ions exchange of zeolite and removes organic molecule and inorganic ions.