Issue 10, 2020

TiO2 microsphere impregnated alginate: a novel hybrid sorbent for uranium removal from aquatic bodies

Abstract

This study presents a simple method of synthesizing TiO2 microspheres and their impregnation into an alginate matrix. TiO2 microspheres were prepared through emulsion polymerization of styrene using PVP as a surfactant followed by a sol–gel process. The microspheres were impregnated into an alginate matrix using a displacement reaction to form beads. The product was characterized by FTIR, XRD, zeta sizer, BET and SEM. The TiO2 microsphere impregnated alginate beads were used to efficiently remove uranium (70–97%) from groundwater in the 0.1 μg mL−1 to 100 μg mL−1 concentration range. Batch experiments were carried out for uptake studies. The developed beads showed maximum uptake at pH 4–6. Sorption isotherms were tested and the uptake process followed the Langmuir model. The sorption capacity evaluated from the Langmuir model was 31.4 mg g−1. The reaction kinetics was explained by the pseudo first order law. The mechanism of sorption was proposed based on the zeta potential of the TiO2 microspheres along with the species of uranium present at various pH values.

Graphical abstract: TiO2 microsphere impregnated alginate: a novel hybrid sorbent for uranium removal from aquatic bodies

Supplementary files

Article information

Article type
Paper
Submitted
03 Dec 2019
Accepted
13 Feb 2020
First published
24 Feb 2020

New J. Chem., 2020,44, 3950-3960

TiO2 microsphere impregnated alginate: a novel hybrid sorbent for uranium removal from aquatic bodies

H. Basu, M. V. Pimple, S. Saha, A. Patel, C. Dansena and R. K. Singhal, New J. Chem., 2020, 44, 3950 DOI: 10.1039/C9NJ06006E

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