自然界的水并不是纯净的。天然水均含有一定的杂质,这些杂质可大体分成三类:一类是溶解物,包括钙、镁、钠、钾、铁、锰、硅等盐类和二氧化碳、氮气、氧气、硫化氢、沼气等气体;另一类是胶体物,如硅胶、腐殖质胶体等;还有一类是悬浮物,包括细菌、藻类、原生动物、泥沙以及其他漂浮物。自 Nature’s water is not pure. Natural water contains certain impurities. These impurities can be roughly divided into three categories: one is lysates, including salts such as calcium, magnesium, sodium, potassium, iron, manganese, silicon, and carbon dioxide, nitrogen, oxygen, hydrogen sulfide, and biogas. Equal gas; the other is a colloidal material, such as silica gel, humus colloid, etc.; there is a type of suspension, including bacteria, algae, protozoa, sediment and other floaters. from