... . It contents potassium, sodium, calcium, magnesium, phosphorus, iron and zinc elements and so on Maifanite is a natural ... drug ore. It contents potassium, sodium, calcium, magnesium, phosphorus, iron and zinc elements, selenium, copper, strontium, iodine, fluorine, ... variety of essential trace elements, that can be used for water purification, sewage treatment, and the bacteria with strong adsorption ...