Water pollution is very common. Water pollution refers to the phenomenon that the amount of pollutants discharged into the water body exceeds the original content and self-purification ability of the substance in the water body, resulting in adverse changes in the physical and chemical characteristics of the water body, destroying the inherent ecological environment of the water body, destroying the function of the water body and its effective utilization in human life and production, endangering human health and causing deterioration of water quality.
Therefore, water pollution prevention and water environmental protection has become a worldwide problem, and it is also a top priority for environmental protection in China.