Teaching Assistant, Beni-Suef University


Cobalt ferrite nanoparticles (CF), titanate nanotubes (T), alginate (G) and their nanocomposite (CF/G and T/G) were prepared via coprecipitation, hydrothermal and gelation methods, respectively. The prepared materials were characterized using X-ray diffraction (XRD), Fourier Transformer Infrared Spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM) and vibrating sample magnetometer (VSM). Our results revealed a successful preparation of the nanocomposite particles. They were used for efficient removal of Cu2+, Fe3+ and As3+ ions from contaminated water. In addition, the effects of pH, contact time, adsorbent weight and heavy metal ion concentration on the removal efficiency were investigated. The optimized batch experiment conditions were found to be pH of 6.5, contact time of 2 h and adsorbent weight of 0.15 g. The removal efficiencies for Cu2+ using G, CF, T, CF/G and T/G were found to be 91%, 100%, 99.9%, 95% and 98%, respectively. While for Fe3+, the removal efficiencies were 60%, 100%, 100%, 60% and 82%, respectively. Efficient removal of As3+ ions was also attained (98% upon using T nanoadsorbents). The gathered equilibrium data for the investigated metal ions over the concentration range from 2 to 15 ppm at 25°C were fitted to both Freundlich and Langmuir isotherms for all the developed nanoadsorbents. The obtained results suggest the occurrence of both physical (multilayer adsorption) and chemical (monolayer formation) interaction between the developed adsorbents and the investigated metal ions. The current study demonstrated that the developed nanomaterials (CF and T) and their corresponding alginate-based nanocomposites could be further tailored and used as efficient adsorbents for the uptake of different heavy metal ions from wastewater.