Thermodynamics and kinetic studies of methyl orange dye adsorption in magnetic material-silica-zeolite (MM-Sio2-NZ) composite

Authors

  • Alrum Armid Department of Chemistry, Faculty of Mathematics and Natural Sciences, Halu Oleo University
  • Fahmiati Fahmiati Universitas Halu Oleo
  • Halimahtussaddiyah Ritonga Department of Chemistry, Faculty of Mathematics and Natural Sciences, Halu Oleo University, Indonesia
  • Darwin Ismail Department of Chemistry, Graduate Program, Halu Oleo University, Indonesia
  • La Ode Ahmad Nur Ramadhan Department of Chemistry, Faculty of Mathematics and Natural Sciences, Halu Oleo University, Indonesia

DOI:

https://doi.org/10.29303/aca.v6i2.159

Keywords:

adsorption, methyl orange, magnetic material, silica, zeolite

Abstract

Using methyl orange (MO) in dye industries can cause the accumulation of MO waste in aquatic systems, including seawater. A magnetic material-silica-zeolite (MM-SiO2-NZ) composite was investigated in vitro to adsorb methyl orange (MO) dye. MM-SiO2-NZ composite was characterized using FTIR, XRF, and VSM. Adsorption studies with pH, concentration, contact time, and temperature variations were carried out to determine the adsorption capacity. The MM-SiO2-NZ characterization results by FTIR showed the presence of OH groups from Fe-OH, Si-OH, and Al-OH, and there were Fe-O, Si-O, Al-O, Si-O-Si, and Si-O-Fe groups. The results of XRF characterization showed that the metal oxide content of Fe2O3 in magnetic material (MM) was 75.39% and decreased to 52.63% after the MM-SiO2-NZ composite was formed. The characterization using VSM indicated the magnetic properties of MM to be 44.083 emu/g, then decreased to 11.407 emu/g after being composited. The adsorption of MM-SiO2-NZ tends to follow the Langmuir adsorption isotherm with a Langmuir constant (KL) value of 1.332 L/mg. Furthermore, the adsorption kinetics followed the pseudo-second-order kinetics with a constant value (k2) of 3×10-2 g.mg/min. MO dye adsorption by MM-SiO2-NZ took place spontaneously with Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS) values of -1.109 kJ/mol, -38.687 kJ/mol, and -12.402 kJ/mol, respectively.

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Methyl orange (MO) dye waste in the aquatic system has become an interesting issue that has been governed by increasing dye industrial practices. Treatment of dye wastes by adsorption has become an efficient method to overcome dye pollution, including MO. In recent years, magnetic materials have been used as adsorbents, however, there is a shortage to use for a long period of time. The present study investigated on a laboratory scale the ability of iron sand magnetic material-silica-zeolite (MM-SiO2-NZ) as an adsorbent of MO dye in order to distinguish their adsorption characteristics.

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Published

2022-05-10

How to Cite

Armid, A., Fahmiati, F., Ritonga, H., Ismail, D. ., & Ramadhan, L. O. A. N. . (2022). Thermodynamics and kinetic studies of methyl orange dye adsorption in magnetic material-silica-zeolite (MM-Sio2-NZ) composite. Acta Chimica Asiana, 6(2), 301–308. https://doi.org/10.29303/aca.v6i2.159

Issue

Vol. 6 No. 2 (2023)

Section

Articles

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Copyright (c) 2023 Alrum Armid, Fahmiati Fahmiati, Halimahtussaddiyah Ritonga, Darwin Ismail, La Ode Ahmad Nur Ramadhan

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