What is anthracite commonly used for in water treatment?

Anthracite is commonly used in water treatment as a top layer in sand water treatment filters. This application takes advantage of anthracite's properties, which include a high density and a relatively large size compared to sand grains. When anthracite is placed on top of a sand filter bed, it allows for efficient filtration of water by enhancing the removal of particulate matter, including solids and certain types of organic materials.

The reason anthracite is favored for this application is that it has a lower density than sand, which allows it to float above the sand layer while still providing effective filtration. This configuration can enhance the filter's overall performance, increase its lifespan, and improve the quality of the treated water.

While anthracite does serve various purposes in other contexts, such as being a fuel source or as a component in chemical processes, its specific role in water treatment as a filter medium is pivotal for achieving optimal water quality.