Cellulose-supported Ni/Al Layered Double Hydroxide (LDH) as Unique Adsorbents for Malachite Green Dye Removal in Aqueous Solutions

Articles in Press

Document Type : Research Article

Authors

1 Research Center of Inorganic Materials and Complexes, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Palembang, 30139, INDONESIA

2 Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Palembang, 30662, INDONESIA

3 Graduate School, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Palembang, 30139, INDONESIA

Abstract

Ni/Al-cellulose composites were successfully synthesized using the co-precipitation method. X-ray Diffraction (XRD), Fourier Transform infrared spectroscopy (FT-IR), Scanning Electron Microscope (SEM), and Brunauer-Emmett-Teller (BET) were used to characterize the structure of materials. Ni/Al-cellulose was applied to the malachite green dye (MG) adsorption process to study adsorption and reusability performance. The surface area of Ni/Al material after composting with cellulose increased, from 3.288 to 5.096 m2/g. The optimum pH for MG was pH 7 and pH PZC > pH optimum. The equilibrium contact time is 150 minutes. The MG adsorption process in this experiment follows the Langmuir isotherm and pseudo second order kinetic models. The adsorption process occurs through physisorption and chemisorption (physicochemical process) based on kinetic data, isotherm data, ΔG value, pH optimum ≠ pH PZC, and FT-IR results of adsorbent after MG adsorption. Ni/Al-cellulose has adsorption capacity and percent removal of 107.527 mg/g (71%). Reusability studies show that Ni/Al-cellulose is more effective for reusable in the adsorption process of MG until the sixth cycle, with an adsorption capacity of 54%. Thus, the synthesized NiAl/cellulose composites could be potentially used as an efficient adsorbent for MG adsorption in wastewater.

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Iranian Journal of Chemistry and Chemical Engineering

Articles in Press, Accepted Manuscript
Available Online from 27 February 2024

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