Activated carbon is a type of carbon with a large specific surface area and porous structure. According to its raw material classification, it can be divided into coal based activated carbon, wood based carbon, fruit shell carbon, and bone based carbon; According to their morphology, they can be divided into columnar carbon, crushed carbon, powdered carbon, and fiber activated carbon. Activated carbon is widely used as an adsorbent in drinking water and wastewater treatment processes due to its developed pore structure and large specific surface area. However, activated carbon lacks selectivity in adsorbing organic matter in water, is prone to saturation, and requires continuous regeneration, which is not ideal for the low concentration, lipophilic adsorption effect that people are currently most concerned about.
The pore structure of activated carbon has a certain influence on its adsorption performance for VOCs. The author selected a typical organic pollutant in VOCs, methyl benzene, as the adsorption medium We conducted research on the adsorption characteristics of volatile organic pollutants by activated carbon from waste.
Adsorption characteristics of waste based activated carbon for toluene, a typical component in volatile organic pollutants. The results indicate that the type of adsorption isotherm for toluene on waste based activated carbon is a preferential adsorption isotherm, indicating good adsorption capacity; At the same time, there is a good linear correlation between the logarithm of the breakthrough time when it adsorbs toluene and the logarithm of the toluene inlet concentration, which can be used to estimate the breakthrough time at low concentrations from the breakthrough time when adsorbing high concentrations of toluene; The mesopores of waste based activated carbon also have certain adsorption properties for toluene during dynamic adsorption.
https://www.naturecarbon.com/wood-based-activated-carbon/granular-activated-carbon.html
