Abstract:

One of the most pressing concerns that scientists are attempting to solve is the removal of heavy metals from industrial waste. The effectiveness of Midyat stone (MS) for the adsorption of Pb2+ ions from aqueous solutions is investigated in this study. The effects of numerous variables on adsorption effectiveness, such as contact duration, initial metal ion concentration, and pH, were studied in the study. Scanning electron microscopy, energy dispersion spectroscopy, and Fourier transform infrared spectroscopy were used to analyze the surface properties of MS. Under the most favorable working conditions for the removal of the Pb2+ ion, the starting concentration, contact duration, and solution pH were determined to be 800 mg/L, 90 minutes, and 4,23, respectively. The results showed that the isotherm data fit the Langmuir isotherm model, and the kinetic data fit the pseudo-second-order (PSO) model. At 298, 308, and 318 K, the adsorption capacity of the Pb2+ ion was determined to be 129.87 mg/g, 178.57 mg/g, and 188.68 mg/g, respectively. The elimination of Pb2+ ions by MS was shown to be natural and endothermic in thermodynamic analyses. Because of its features, such as high adsorption capacity, low cost, and ease of availability, it has been determined that MS is an effective and promising material for removing Pb2+ ions from the aqueous environment.

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