Adsorption of remazol reactive black B on different types of activated carbon: Adsorption on H and L carbon

摘要

Five types of activated carbon were tested to adsorb Remazol Reactive Black B, which is a problematic dye pollutant. The equilibrium adsorption isotherm results showed that three of these carbons, F-400, C207 and EA207, have a high capacity (278, 109 and 96 mg dye/g carbon, respectively). On the other hand, Centaur and Chilean coal had no affinity toward Reactive Black. H+ and OH- capacity, pH(ZPC) and pH(solution) were determined for all the carbons. According to the chemical behaviour, the carbons were categorised as H and L carbons. The carbons with high capacity were of H type, while the ineffective two carbons can be described as L type carbon. The effective carbons showed high pH(ZPC) compared to the ineffective carbons. The adsorption behaviour and the differences in the effectiveness of the carbons for Reactive Black adsorption were attributed to the surface charge developed on the carbon particles at the equilibrium pH. Surface area, iodine value, bulk density and ash content were found to have no relation to the adsorptive capacity. References: 19