Özet:

In recent years, the removal of heavy metals from water has gained importance. For this purpose, pure TiO2 nanoparticles and TiO2/activated sludge composition were synthesized by sol-gel method for removal of Cu (II) heavy metal in this work. Characterization analyzes of the synthesized materials were performed using X-ray diffraction (XRD), Ultraviolet–visible spectroscopy (UV–VIS) spectrometer, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and Fourier Transform Infrared Spectroscopy (FTIR) techniques. The adsorption potential of nanosized TiO2 and TiO2/activated sludge composition for removal of Cu  (II) was investigated in a batch system. TiO2/sewage sludge at 25 oC was found to be the best adsorbent for copper removal. In order to determine the optimum conditions of the adsorption system, the effects of the parameters such as the effect of pH, contact time, initial metal ion concentrations were investigated. The suitability of the system for Langmuir and Freundlich adsorption isotherms was investigated, and it was determined that Langmuir isotherm was more suitable and the maximum adsorption capacity of the system was calculated as 47.61 mg/g. In the studies conducted to determine the most suitable kinetic model, it was observed that the adsorption process conformed to the pseudo-second kinetic model. Gibbs free energy and enthalpy values ​​show that the system is spontaneous and exothermic.

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