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Copper Aluminum Layered Double Hydroxide Modified by Biochar and its Application as an Adsorbent for Procion Red

2020; Japan Society on Water Environment; Volume: 18; Issue: 6 Linguagem: Inglês

10.2965/jwet.20-059

1348-2165

Neza Rahayu Palapa, Novie Juleanti, Normah, Risfidian Mohadi, Tarmizi Taher, Addy Rachmat, Aldes Lesbani,

Layered Double Hydroxides Synthesis and Applications

The preparation of a copper aluminum/biochar composite and its application for the adsorption of procion red dye was studied. The composite materials were prepared by a co-precipitation method and characterised by X-ray diffraction, Fourier-transform infrared spectroscopy, Brunauer-Emmett-Teller surface area analysis, scanning electron microscopy, and thermogravimetry. The results of the adsorption study show that adsorption on the copper aluminum/biochar composite follows pseudo-second-order kinetics, and the adsorption isotherm of procion red conforms to the Langmuir isotherm model. The Langmuir fitting result for the maximum adsorption quantity of procion red on copper aluminum/biochar composite is 175.439 mg/g, which is higher than copper aluminum layered double hydroxide. The thermodynamic analysis suggests that procion red adsorption is spontaneous (standard free energy < 0) and endothermic and involves a random solid–liquid phase interface. The composite materials exhibited good recycling performance.