Novel waste water treatment strategy using titanate nanofibers in fixed bed reactor

Abstract

In this paper, the preparation of TiO2 nanorods by sol–gel-template process has been considered. The prepared sols were characterized by using SEM images show that TiO2 nanorods with uniform diameter of about Uniformly sized TiO2 nanorods were obtained of approximately 10–50 nm in diameter. Effects of pH, concentration are systematically studied. Results show that the adsorption is highly pH-dependent and the removal is almost complete (99%) for pH 3. Equilibrium batch experiments were conducted and the results were found to be fit with the Langmuir isotherm equation. Langmuir constants were obtained b = 0.0273 L/mg and qm = 147 mg/g. This study is to evaluate the suitability of the titanate nano fibres as adsorbent media in a continuous flow packed bed reactor for removing arsenate from water. The desorption studies shows that the percentage desorption has reached 92% at 75 min of desorption. Since the equipment required for TNs synthesis is simple and cheap, and alkali solutions are reusable, TNs can be regarded as an efficient, low-cost adsorbent for the removal of arsenic.