รายละเอียดผลงาน

This research was aimed to study the adsorption capacity and removal of alizarin Red S (ARS) dye using amino-functionalized graphene oxide (NH2-GO) as an adsorbent in the presence of CTAB. The optimum conditions were consisted of 100 mg/L initial concentration of ARS with 0.015 g adsorbent at solution pH 2.0. The adsorption equilibrium was completely reached within 60 min. at 28?C. The maximum adsorption capacity of NH2-GO for ARS in the presence of CTAB (0.6 mM) was 135.1 mg/g, about three times higher than that of NH2-GO (42.0 mg/g) in the absence of CTAB. The adsorption kinetics well fitted using a pseudo second-order kinetic model. The intra-particle diffusion model obtained clearly defined its rate-limiting step. Changes in free energy, enthalpy and entropy were also evaluated.