"particulate matter: including sediment, rust, algae, suspended matter and other visible particulate impurities, particulate matter is the main source of turbidity, chroma, odor."
-Deshangchemical
1. particulate matter: including sediment, rust, algae, suspended matter and other visible particulate impurities, particulate matter is the main source of turbidity, chroma, odor.
2. colloidal substances: Colloidal substances are larger than ionic substances and smaller than particulate matter. A colloid is a collection of many molecules and ions.
3. ionic substances: including cations and anions. Ionic substances are usually soluble in water and can be removed by ion exchange or desalting.
4. non-reactive dissolved gas: refers to such as nitrogen, which does not react with aquatic biochemistry, producing compounds that introduce ionic pollutants into the water and affect the PH value of the water.
5. reactive dissolved gases: the common dissolved gases in natural water are oxygen, carbon dioxide, and sometimes hydrogen sulfide and ammonia. Most of these gases dissolved in water have a corrosive effect on metals, which is an important factor causing metal corrosion in water systems.