Synthesis, Characterization, and Application of Geopolymer/TiO2 Nanoparticles Composite for Efficient Removal of Cu(II) and Cd(II) Ions from Aqueous Media

The use of fly ash wastes as inexpensive sorbents, mostly for heavy metal cations, is one method recycling the millions tons waste produced each year. In this paper, a ash-based geopolymer was used an adsorbent Cu2+ and Cd2+ from aqueous solution. To improve sorption efficiency, modified by incorporating titanium oxide (TiO2) nanoparticles that were synthesized hydrothermally annealed at temperature 500 °C. adsorbents characterized before after adsorption X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM-EDX). Regarding developed materials, equilibria (Langmuir model Freundlich model) kinetics (pseudo-first-order pseudo-second-order investigated. results show geopolymer-NanoTiO2 adsorbs cations better, which superior to geopolymer. maximum experimental capacity composite 1708.2 mg/g 706.9 mg/g, respectively. Therefore, has shown great application prospects in prevention control pollution.