Synthesis, Characterization, Adsorption Isotherm, and Kinetic Study of Oil Palm Trunk-Derived Activated Carbon for Tannin Removal from Aqueous Solution
Adeline Lim, Jiuan Jing Chew, Lock Hei Ngu, Suryadi Ismadji, Deni Shidqi Khaerudini, Jaka Sunarso
Abstract
) of 4.8 and an increasing ionization of tannic acid with pH rise between 4 and 7. Adsorption kinetics data were also obtained at four different pH of 2, 4, 6, and 8 where the nonlinear pseudo-first-order model best fitted the kinetic at pH of 2 and the nonlinear pseudo-second-order model represented the kinetic best at the remaining higher pH, which suggests that tannin adsorption onto AC occurred by physisorption at pH of 2 and by chemisorption at pH of 4, 6, and 8.
Topics & Concepts
Activated carbonFreundlich equationAdsorptionLangmuirSpecific surface areaChemistryTanninPhysisorptionIodine valueBET theoryAqueous solutionNuclear chemistryLangmuir adsorption modelMesoporous materialSorptionChemical engineeringMaterials scienceOrganic chemistryCatalysisFood scienceEngineeringAdsorption and biosorption for pollutant removalSupercapacitor Materials and FabricationCarbon and Quantum Dots Applications