Аңдатпа
In this study, activated carbon (AC) was produced from rice husks using a chemical activation method. The resulting material was characterized by a high specific surface area S BET = 2690 m²/g. To improve the adsorption properties, the activated carbon was further modified with MgAlFe-LDH layered double hydroxides to produce an AC/LDH composite. The textural and structural properties of the samples were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Fourier-transform infrared spectroscopy and low-temperature nitrogen adsorption–desorption with the specific surface area calculated using the BET method. The resulting materials were investigated as adsorbents for the removal of Rose Bengal (RB) dye from aqueous solutions and real aqueous matrices. The influence of key process parameters, including contact time, solution pH, adsorbent dosage, and initial dye concentration, was studied. Under optimal adsorption conditions, a dye removal efficiency of 97.05% was achieved for AC and 100% for AC/LDH. Additionally, the possibility of reusing the adsorbents after regeneration was evaluated. Analysis of N₂ adsorption–desorption isotherms showed that the materials obtained possess a well-developed porous structure with the presence of micro- and mesopores. The equilibrium adsorption data were well described by the Langmuir model with high correlation coefficients for AC and AC/LDH - R² = 0.9969 and R² = 0.9966, respectively. The kinetic data were consistent with a pseudo-second-order model. Research has shown that the maximum adsorption capacity of AC and AC/LDH reached 544.56 and 508.5 mg/g respectively. Additional experiments under real-world conditions were conducted using wastewater from the Sorbulak storage tank. The results showed that the AC/LDH composite exhibits high adsorption efficiency in removing RB from real-world aqueous environments and demonstrates stability during reuse.