How a Refrigerator Water Filter Works?

Most refrigerator water filters are designed to remove bad tastes and odors using a combination of sediment and carbon filtration. Refrigerator filters contain a carbon block core wrapped in a material like polypropylene. Water flows mechanically through the outer material to remove debris and suspended solids. Other unwanted particles cling the surface of the carbon block.

Contaminants in water adhere to the carbon in a refrigerator filter through a process called adsorption. They don't soak into the surface (absorption) of the carbon but adhere to a spot within carbon's enormous surface area (adsorption).