自然界的水,由于广泛接触土壤、矿物及其他原因,总是或多或少地含有杂质,以至于呈现出深浅不同的颜色、带有一定程度的浑浊或异味。为了适应工农业生产及日常生活的需要,人们必须对这些天然水进行净化处理。自来水厂就是净化水的重要场所之一。我们在实验室或自己的家中,也完全可以进行水的净化实验,从而了解 Water in nature, due to its wide range of exposure to soils, minerals and other causes, always contains impurities to a greater or lesser extent, so that different shades of color appear, with a degree of turbidity or odor. In order to meet the needs of industrial and agricultural production and daily life, people must purify these natural water. Waterworks is one of the important places to purify water. We are in the laboratory or their own home, but also can be completely water purification experiments to understand