Study On Modified Phosphoramidic Acid Chelate Resin And Disposed Residual Chlorine Of Drinking Water

At present, chlorization disinfection in water is adopted widely in urban supply water system in order to restrain the propagate of pathogenic bacteria, virus and other pathogenic organism once again, water is disinfected some time later, there should have a proper quantity chlorine retaining in water to ensure continuous capacity of killing germs. However, the residual chlorine can affect people's taste and smell, destroy the quality of water. Moreover, in the process of disinfection, chlorine can react with organic matter and produce a series of hydrochloric ether such as chloroform, bromoform, bromodichloromethane, chlorodibromomethane and so on, these matters can cause to some extent cancer to human body. Therefore, it's a valuable task to make a study of disposing residual chlorine of water.In this paper, we first make a detail analysis,study and discussion of the existing disposing-chlorine method, on this condition, a new method based on the way of oxidation and deoxidization is discussed, phosphoramidic acid chelate resin is chosen as framework material, this kind of new disposing-chlorine materials can be obtained by loading Fe²⁺ on the skeleton of the materials, the residual chlorine is disposed by taking advantage of chlorine oxidizing Fe²⁺. Because this material has a strong capacity of chelateding and exchanging with Fe²⁺, Fe²⁺ is hardly possible to be exchanged by other ions and reentry into water. Thereby, the obvious characteristic of this method is its high selectivity. It will not bring other ions in water in the process of disposing chlorine, it also will not take sequential pollution and can get high quality water. It can completely make the coming-out water coincide with our national drinking water standard, a new disposing-chlorine method is obtained.In this paper, the effect of the disposing-chlorine materials under different conditions is discussed in details, such as modification condition, disposing-chlorine condition, disturbing condition, cleansing condition, as well as some preliminary technology craft condition. The experiment shows that the disposing-chlorine materials have a high disposing-chlorine capability, with modified phosphoramidic...