Carbon Filters


What are Carbon Filters?

Carbon Filters are typically installed to polish the water or as a final stage of a multiple stage water filtration system to remove odors and potential taste of chlorine if  chlorination was part of your water purification process. While carbon filters are very effective at removing tastes and odors they are by no means a complete solution to water conditioning and providing your family with pure clean quality water. Below are some links to Wiki articles that better explain the role of carbon filters in a complete home filtration system. According to Wikipedia.org

Carbon filtering

Carbon filtering is a method of filtering that uses a bed of activated carbon to remove contaminants and impurities, using chemical adsorption.

Each particle/granule of carbon provides a large surface area/pore structure, allowing contaminants the maximum possible exposure to the active sites within the filter media. One pound (450 g) of activated carbon contains a surface area of approximately 100 acres (40 Hectares).

Activated carbon works via a process called adsorption, whereby pollutant molecules in the fluid to be treated are trapped inside the pore structure of the carbon substrate. Carbon filtering is commonly used for water purification, in air purifiers and industrial gas processing, for example the removal of siloxanes and hydrogen sulfide from biogas. It is also used in a number of other applications, including respirator masks, the purification of sugarcane and in the recovery of precious metals, especially gold.

Carbon filters are most effective at removing chlorine, sediment, volatile organic compounds (VOCs), taste and odor from water. They are not effective at removing minerals, salts, and dissolved inorganic compounds.

Typical particle sizes that can be removed by carbon filters range from 0.5 to 50 micrometres. The particle size will be used as part of the filter description. The efficacy of a carbon filter is also based upon the flow rate regulation. When the water is allowed to flow through the filter at a slower rate, the contaminants are exposed to the filter media for a longer amount of time.

History of carbon filters

Carbon filters have been used for several hundred years and are considered one of the oldest means of water purification. Historians have shown evidence that carbon filtration may have been used in ancient Egyptian cultures for both air and water sanitization.2000 B.C. Sanskrit text refers to filtering water through charcoal (1905 translation of “Sushruta Samhita” by Francis Evelyn Place).  The first modern use of a carbon filter to purify potable water occurred in 1862. Carbon filtration was further advanced in the mid-1970s by H. Allen Rice and Alvin E. Rice when they first manufactured a porous carbon block for drinking water use.

Currently, carbon filters are used in individual homes as point-of-use water filters, groundwater remediation, landfill leachate, industrial wastewater and, occasionally, in municipal water treatment facilities. They are also used as pre-treatment devices for reverse osmosis systems and as specialized filters designed to remove chlorine-resistant cysts, such as giardia and cryptosporidium.

http://www.wikipedia.org/wiki/Carbon filtering

Carbon filtering is a method of filtering that uses a bed of activated carbon to … Carbon filters are most effective at removing chlorine , …

Activated carbon

http://www.wikipedia.org/wiki/Activated carbon

Activated carbon, also called activated charcoal, activated coal, or carbo … Activated carbon filters can be used to filter vodka and …

Water purification

http://www.wikipedia.org/wiki/Water purification

biological processes such as slow sand filters or biologically active carbon , chemical processes such as flocculation and chlorination …

Water filter

http://www.wikipedia.org/wiki/Water filter

Point-of-use filters for home use include granular-activated carbon filters (GAC) used for carbon filtering , metallic alloy filters , …

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