... potassium, sodium, calcium, magnesium, phosphorus, iron and zinc elements and so on Maifanite is a natural drug ore. It ... , copper, strontium, iodine, fluorine, silicic acid and other eighteen kinds of trace elements , which are necessary for the human ... Maifanite contains a variety of essential trace elements, that can be used for water purification, sewage treatment, and the bacteria with strong ...