Water purification systems nowadays use carbon as the main constituent material of their filter. This carbon is compressed into a solid block form as opposed to the more granular, loosely structured sand filters. Such filters often include other kinds of media substances aside from solid and compressed carbon.
Water filters clean using both chemical and physical processes. Physically, they block the passage of unwanted materials with molecular structures that are larger than water. Chemically, the carbon filters perform an added filtration function.
Through the adsorption process, the carbon’s atomic charge and other media help encourage unwanted particles to abandon their connection to the water and attach chemically to the media. The water then goes through the filter cleansed of undesirable materials.
The addition of extra media into the standard filter constitution allows for more particles to effectively chemically bond to the media. This results in greater efficiency and performance. Water is then directed through several stages of multimedia filters and carbon filters to ensure the complete removal of any unwanted materials.
The first stage of filtration will kick out the most concentrated form of chemicals, such as chlorine, while the following stages will remove more evasive and smaller chemicals such as pesticides.