Abstract

In physical and chemical processes of ground water, pH is a very important parameter. PH parameter of ground water in HCM city is lower and lower (the acidity of ground water is hight). This shows that the ground water in HCM city is polluted more and more. In treating process, at first, the polluted ground water must be treated pH parameter by a natural reaction. The natural reaction will make the natural ground water with pH=7. We show many filter models in which we use the natural inorganic materials. They are normal, cheap and very good. People can use them to filter the polluted ground water at their house.