Manganese is brown, round, and the main composition is NmO2, which contains 35-42%. When it is used to treat the ground water, the technique is very simple, and the operation is very convenient, also it takes smaller areas, and its project cost is very low, and its effect can keep longer time, the service recycle can maintain more than 5years, so it is easy to be controlled. It can remove the iron, manganese and other harmful material from the water, but doesn’t need to add any chemical agent, the water quality can totally exceed to the national drinking water standard, so it is such a good ground water treatment material. Manganese sand physical and chemical analysis Analysis/unit MnO2 % Fe % SiO2 % Specific weight g/cm3 Volume weight g/cm3 Solubility of HCl % mud% Index 20 ～45 20 17～20 3.2～3.6 2.0 ＜3.5 ＜2.5