Adsorption Study of Malachite Green Removal from Aqueous Solution Using Cu/M3+ (M3+=Al, Cr) Layered Double Hydroxide
Neza Rahayu Palapa, Risfidian Mohadi, Addy Rachmat, Aldes Lesbani
Abstract
Layered double hydroxide (LDH) Cu/Al and Cu/Cr had been used as adsorbent of malachite green (MG) in aqueous solution. The properties of Cu/Al and Cu/Cr LDHs were analyzed by X-ray diffraction, surface area analysis (BET) and FTIR spectroscopy. Adsorption study of MG was achieved at pH 9. Adsorption of MG follows the pseudo-second-order kinetic model. Langmuir isotherm was suitable for adsorption of MG on both LDH with a maximum adsorption capacity of 59.52 mg/g. The thermodynamic study indicated that the adsorption process is physisorption, spontaneous, and endothermic process. Adsorption of MG onto LDHs involve the acid-base interaction between adsorbent and adsorbate.
Topics & Concepts
ChemistryAdsorptionPhysisorptionMalachite greenEndothermic processAqueous solutionHydroxideLangmuir adsorption modelHydrotalciteLayered double hydroxidesFourier transform infrared spectroscopyInorganic chemistryNuclear chemistryChemical engineeringCatalysisOrganic chemistryEngineeringLayered Double Hydroxides Synthesis and ApplicationsAdsorption and biosorption for pollutant removalNanomaterials for catalytic reactions