From appearance and basic characteristics, water treatment quartz sand filter media has uniform particles and a smooth surface, predominantly white or nearly transparent. It boasts stable chemical properties, resistance to both acids and alkalis, and is not prone to corrosion. The main component of quartz sand filter media is silicon dioxide, typically containing over 98%, which ensures it remains unattacked by chemicals in complex water treatment environments, thereby guaranteeing water quality is not re-contaminated due to the filter material.

Filtering is one of the core functions of water treatment quartz sand. In water filtration systems, quartz sand is packed to form a certain thickness of filter layer. As turbid water flows from top to bottom through the quartz sand filter layer, suspended particles, silt, algae, and other impurities are intercepted by the tiny pores between the quartz sand particles. These pores vary in size, creating a multi-layer filtering effect. Larger particles are blocked first by the larger pores on the surface, while smaller particles are captured by finer pores as the water flows deeper into the filter layer. After passing through the quartz sand filter layer, the originally turbid water becomes clear and transparent, with a significant reduction in suspended matter content, providing a good foundation for subsequent advanced treatment. For example, in urban waterworks, quartz sand filtration is an essential step, effectively removing most impurities from the raw water and ensuring the basic clarity of drinking water.

In addition to filtering out suspended impurities, water treatment quartz sand can also remove some harmful substances from the water through adsorption. Although the adsorption capacity of quartz sand is relatively weaker than that of activated carbon and other adsorbents, its surface is not completely smooth, featuring some microscopic indentations and charge distribution. These microstructures enable quartz sand to adsorb certain heavy metal ions and a small amount of organic pollutants in the water. When water containing these harmful substances flows through the quartz sand filter layer, some ions and pollutants are adsorbed onto the surface of the quartz sand, thereby reducing the concentration of harmful substances in the water. Although its adsorption capacity is limited, quartz sand is not used alone in the entire water treatment process. Instead, it is used in conjunction with various filtration materials such as activated carbon, manganese sand, and magnetite, among others. This协同作用 with other treatment processes contributes positively to the improvement of water quality.