Effectively Removing Methyl Orange From Aqueous Solutions Using Sulphuric Acid Modified Midyat Stone

Abstract

In this research, the efficiency of Midyat stone modified with sulphuric acid (H2SO4) in the removal of Methyl Orange (MO) from wastewater is evaluated. Various factors such as contact time, initial MO concentration, and adsorbent dosage were investigated to understand their influence on adsorption efficiency. The optimal conditions for MO removal were as follows: initial concentration 300 mg/L, contact time 70 min, adsorbent dosage 0.5 g. The surface properties of modified Midyat stone (MMS) were investigated using methods such as Fourier transform infrared spectroscopy (FT-IR) and Brunauer, Emmett, and Teller (BET). According to the findings, the isotherm data agreed with the Langmuir isotherm model, indicating both chemical sorption and irreversibility potential. The adsorption capacity of MO at 298, 308 and 318 K was calculated to be 50.02, 54.05 and 58.48 mg/g, respectively. In addition, adsorption kinetics data supported the pseudo-second-order (PSO) kinetic model for MO removal. The research identified MMS as a capable and adaptable substance for capturing MO ions from the aqueous environment due to its significant removal capacity, easy availability, and cost-effectiveness.

Keywords

• Modified Midyat stone
• Adsorption
• Methyl orange
• Kinetic models
• Isotherm models.

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