چكيده به لاتين
Purification methods has led to increased attention on the use of effective adsorbents. This study investigates the removal of methyl orange and methylene blue dyes using batch systems and MXene modified with cetyltrimethylammonium bromide (CTAB) surfactant, as well as MXene combined with metal-organic frameworks (MOFs). First, modified MXene was employed for the removal of methyl orange, and then, to enhance the adsorption capacity for the cationic dye methylene blue, MXene combined with MOFs was utilized. The characteristics of the adsorbents were evaluated using Zeta potential, XRD, FESEM, BET, and FTIR analyses. In the batch system, the effects of factors such as contact time, pH, adsorbent dosage, and initial dye concentration were examined. The experimental data were analyzed with five isotherm models (Langmuir, Freundlich, Temkin, Halsey, and Jovanovic), and the results indicated that the Langmuir isotherm model best fitted the data for the removal of methyl orange using modified MXene, while the Jovanovic isotherm model best described the removal of methylene blue using MXene combined with MOFs. The maximum adsorption capacities obtained from the Langmuir model were 213 mg/g and 1012 mg/g at 25°C, respectively. Moreover, in both cases, the pseudo-second-order kinetic model provided the best fit for the experimental data of methyl orange removal from aqueous solution, while the fractional-order kinetic model best described the experimental data for methylene blue removal.
Keywords: MXene, Adsorption, Pollutant, Two-dimensional materials, Water and wastewater treatment.
