Chemical Filters
Chemical filters use a carbon filter to remove chemicals from fluids. This filtering process relies on the ability of carbon to absorb contaminants. Carbon has a positive charge, and therefore attracts all negatively charged chemicals that may contaminate various liquids. Although a carbon filter cannot remove every contaminant, the slower the liquid flows through the filter, the more chemicals are removed.
Several types of chemical filters are available for removing chemicals and other contaminants from liquids. Water filters are primarily used to soften water and to remove chemicals such as chlorine and fluoride. Water filters can be attached directly to water sources, such as a faucet. In residential and commercial areas, drinking water is often filtered in specialized pitchers with replaceable carbon filters. Carbon filters can also be used in water treatment plants. Laboratories use chemical filters to remove chemicals of various designs. These filters can use many different kinds of filter media besides carbon.