Activated carbon is an adsorbent produced by thermal or chemical activation of different and carbonizable raw materials found in nature: sawdust, lignite, peat, coconut shells, bituminous coal, olive pits etc. The active surface is essentially constituted by meso and micropores that represent the most important categories for adsorption.
Among the different purification processes, adsorption with activated carbon is the most effective when you need to remove traces or small quantities of substances contained in large volumes of solutions or gaseous streams.
The activated carbons are used to adsorb gaseous impurities in the plants intended for the treatment of air and gas, to recover condensable solvents, flue gas treatment, in food industry, chemical, pharmaceutical. Also very common is the application in the purification processes and wastewater treatment, as well as the remediation of land and groundwater and in the individual protection.
The vast field of use of the activated carbon can be divided into two major categories according to their application, whether it takes place in liquid phase or in gas phase:
CARBON IN LIQUID PHASE
• purification, deodorization, dechlorination of drinking water, treatment of waste water from industrial processes, de-oiling of condensing boiler waters;
• decolorization and refining oils, fats, sugar, lactose, glucose;
• purification of chemicals, pharmaceuticals and food;
• medicine and veterinary use;
CARBON IN GAS PHASE
• recovery of solvents in the rubber industry, adhesive tapes, wallpaper, printing, photographic and cinematographic film, cellophane, degreasing of mechanical parts, paint;
• air purification for the elimination of toxic and odorous gases from workplaces, public halls, cold stores;
• Protection against fighting gas in gas masks and collective filters shelters;
• industrial gas purification or intended to synthesis processes;
• desulfurization and mercury removal;
• catalysis in chemical industry for hydrogenation, halogenation, polymerization, isomerization, oxidation and condensation processes;
The use of granular activated carbon is also advantageous for the possibility of being reactivated once, saturated with organic substances.