NDLI: Efficient Adsorption Removal of an Anionic Azo Dye by Lignocellulosic Waste Material and Sludge Recycling into Combustible Briquettes

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Efficient Adsorption Removal of an Anionic Azo Dye by Lignocellulosic Waste Material and Sludge Recycling into Combustible Briquettes

Content Provider	MDPI
Author	Kali, Abderrahim Amar, Abdelouahed Loulidi, Ilyasse Hadey, Chaimaa Jabri, Maria Alrashdi, Awad A. Lgaz, Hassane Sadoq, Mohamed El-Kordy, Abderrazek Boukhlifi, Fatima
Copyright Year	2022
Description	In recent years, the removal of dyes has emerged as a significant problem that attracted several researchers. The search for green and eco-friendly adsorbents has been a never-ending task in environmental protection to overcome this issue. Herein, almond shells (AS) were used as an adsorbent to remove methyl orange (MO) from aqueous solutions. The AS was characterized using several techniques such as X-ray diffraction (XRD), scanning electron microscope (SEM), and Fourier transform infrared spectroscopy (FTIR). Adsorption experiments were carried out under different pH, temperature, and AS particle size conditions. Kinetic and isothermal studies revealed that MO adsorption on the AS reached equilibrium at 90 min, following the pseudo-second-order (PSO) kinetic model. The Langmuir adsorption isotherm was found the suitable adsorption model for MO adsorption on AS, showing a maximum adsorption capacity of 15.63 mg/g. Thermodynamic parameters such as the change in standard enthalpy (ΔH°), the change in standard entropy (ΔS°), and the change in standard free energy (ΔG°) indicated that the MO dye adsorption process is non-spontaneous, endothermic, and physical, which was further confirmed from FTIR analysis of AS samples after adsorption. The contaminated sludge was converted into biochar by slow pyrolysis at a temperature of 400 °C for 2 h. Biochar has been exploited for the manufacture of combustible briquettes.
Starting Page	22
e-ISSN	25045377
DOI	10.3390/colloids6020022
Journal	Colloids and Interfaces
Issue Number	2
Volume Number	6
Language	English
Publisher	MDPI
Publisher Date	2022-04-06
Access Restriction	Open
Subject Keyword	Colloids and Interfaces Environmental Engineering Adsorption Dye Removal Methyl Orange Almond Shell Biochar Combustible Briquettes
Content Type	Text
Resource Type	Article

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