Dyes are known to be toxic, carcinogenic and mutagenic. Their release into the environment can causeaesthetic pollution, and moreover, they are not degraded by conventional aerobic wastewater treatment dueto their recalcitrance. Therefore, it is necessary to reduce dye concentration in the wastewater. Activatedcarbon was obtained from capsicum straw by chemical activation using KOH as an activator. Then it wasused as an adsorbent for the removal of dye methylene blue. The adsorption of dye methylene blue byactivated carbon was carried out in detail. Kinetic adsorption data were analysed by the pseudo-first-orderkinetic model, the pseudo-second-order model and the intraparticle diffusion model. The experimental datawere analysed by the Langmuir and Freundlich models of adsorption. The thermodynamics parameterswere also calculated.
展开▼
