| dc.description.abstract | In this study, the researchers utilized the efficiency of activated longkong langsat peels to remove the Bromothymol Blue (BTB) dye solution. Pyrolyzed longkong langsat peels, functionalized with sodium hydroxide, were developed to eliminate bromothymol blue (BTB) dye from a concentrated solution. The adsorbent's performance was determined by studying the effects of dosage, pH, concentration, temperature, contact time, and recyclability. The surface morphology and composition in terms of its functional groups,
as analyzed by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), were employed to characterize the adsorbent. Kinetic analyses were carried out applying pseudo-first and second-order models, along with Langmuir and Freundlich isotherms. The adsorption results determined that activated longkong langsat can be used as an adsorbent for removing bromothymol dyes. The experiment's equilibrium data reached an adsorption capacity of 81.07% BTB. For the isotherm study, the Langmuir isotherm model was the closest match to the adsorption results of longkong langsat peels. In addition, the pseudo-second-order model had the best fit for predicting adsorption kinetics. | en_US |
