Author(s)

Afshin Shokati Poursani^1*, Abdolreza Nilchi², Amirhessam Hassani¹, Seyed Mahmood Shariat¹, Jafar Nouri¹

¹Department Environmental Pollution, Faculty of Energy and Environment, Science and Research Branch, Islamic Azad University, Tehran, Iran.
²Nuclear Science and Technology Research Institute, Tehran, Iran.

In this study, nano-TiO₂ particles were synthesized by sol-gel method. The synthesized nanoparticles were characterized by Fourier Transform Infrared (FT-IR), X-ray diffraction (XRD), Transmission electron microscope (TEM) and Brunauer-Emmett-Teller (BET). The results showed that the average size of TiO₂ nanoparticles and their specific surface area were 21.1 nanometer and 55.35 m²/gr, respectively. The effects of several variables such as adsorbent weight, pH and contact time on lead ions adsorption were studied in batch experiments and finally the optimum conditions for lead ions adsorption by synthesized nano-TiO₂ were obtained. The results showed that the synthesized nano TiO₂ had a good capacity to adsorb lead ion. The kinetic data were described by pseudo-first and second-order models. Freundlich and Langmuir isotherm models were used for the analysis of equilibrium data, and results showed that the Langmuir model was suitable for describing the equilibrium data of lead ion adsorption by nano TiO₂. Using the Langmuir isotherm, the maximum sorption capacity of Pb²⁺ was estimated to be 7.41 (mg/g) at 25°C.

TiO₂, Lead, Adsorption, Kinetic Studies

Poursani, A. , Nilchi, A. , Hassani, A. , Shariat, S. and Nouri, J. (2016) The Synthesis of Nano TiO₂ and Its Use for Removal of Lead Ions from Aqueous Solution. Journal of Water Resource and Protection, 8, 438-448. doi: 10.4236/jwarp.2016.84037.