ACTIVATED CARBON FILTRATION
Removes chlorine from water
ONE OF THE MOST IMPORTANT PROCESSES IN WATER TREATMENT
Activated carbon filtration is used in water treatment to reliably remove foreign substances, such as chlorine, from tap water. Several organic substances are bound by the unique pore structure of the activated carbon. Black carbon is currently very popular also in the cosmetics and health sectors.
WHAT IS ACTIVATED CARBON?
Activated carbon is a very porous, fine-grained carbon that is frequently produced from coconut husks by means of a special thermal treatment.
At the end of this process, a highly effective and sustainable filter is obtained that is now almost indispensable, in particular for removing the disinfectant, chlorine, from tap water.
Before activated carbon was discovered for the treatment of drinking water, it was used in the industrial treatment of waste water to filter out impurities such as dyes and flavourings or substances toxic to bacteria. Nowadays, activated carbon filtration is also gaining importance for waterworks, as water is increasingly contaminated with man-made organic trace elements. Activated carbon can, in fact, remove organic substances such as natural fragrances and flavourings, certain pesticides and insecticides.
In the case of hormones, antibiotics, arsenic, uranium and heavy metals, however, this all-round talent has its limitations. Lead and chrome, for example, cannot be filtered out of the air or water, and the same applies to nitrates. For this purpose, other filtration methods are used in which the activated carbon is often used as a pre-filter.
HOW DOES ACTIVATED CARBON FILTRATION WORK?
The surface of four grams of activated carbon is roughly equivalent to that of a football field. This amazing surface area is possible due to numerous duct-like cavities, namely pores. Its large inner surface thus makes activated carbon an ideal filter. For the treatment of drinking water, the principle of adsorption comes into effect: molecules of harmful substances in contaminated liquids are adsorbed by the differently sized pores of the activated carbon, and bound, thus constantly minimising the concentration of the foreign substances.
ALTERNATIVE APPLICATIONS IN THE CITY, IN THE AIR AND IN COSMETICS
The natural activated carbon filter process is also used to purify the air, and is becoming increasingly important due to the debates over excessively high emissions values in large cities. Volatile organic compounds can be filtered out of the air in metropolitan areas. Activated carbon filters are also used to purify exhaust air created by industrial production processes.
Activated carbon is also in used in other areas of our daily lives. Charcoal tablets are popular among travellers for preventing or treating gastrointestinal infections. A new trend is the use of activated carbon in cosmetics and in so-called "black smoothies". Carbon is viewed as a miracle cure that can detoxify the body on the inside and outside, with a health-promoting effect. Medics and nutritionists debate the actual effectiveness of such products. In the treatment of drinking water, on the other hand, activated carbon has a long track record of success.
FIVE FACTS ABOUT ACTIVATED CARBON
- As conventional filtration in sewage treatment plants is increasingly reaching its limits and artificial substances are making their way into our drinking water, activated carbon filtration for the treatment of tap water by the waterworks is gaining more and more importance.
- Activated carbon is essential for the treatment of drinking water. It allows organic impurities in the water and undesired flavourings and fragrances to be reliably filtered out.
- Chlorine is also eliminated in this way, for example.
- Activated carbon is a sustainable, natural raw material that is produced from wood and nutshells, for example.
- Activated carbon has an extremely large adsorption surface: The inner surface of four grams of activated carbon is roughly equivalent to that of a football field.