Development of alumina/iron oxide nanocomposites as adsorbents for arsenic and fluoride removal from aqueous solutions

Process optimization

Conference Paper (2017)
Author(s)

T. C. Prathna (IHE Delft Institute for Water Education)

S.K. Sharma (IHE Delft Institute for Water Education)

Maria Kennedy (TU Delft - Sanitary Engineering, IHE Delft Institute for Water Education)

Research Group
Sanitary Engineering
More Info
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Publication Year
2017
Language
English
Research Group
Sanitary Engineering
Volume number
2
Pages (from-to)
231-234
ISBN (electronic)
9780997511796

Abstract

The study was designed to optimize the process for the synthesis of alumina/iron oxide nanocomposites and to investigate their potential as a sorbent to remove fluoride and arsenic from contaminated water. The nanocomposites had a size range between ∼250-500 nm. Process variables such as the weight of iron oxide nanoparticles added during the course of synthesis of the nanocomposites and the duration of calcination were studied as a function of particle size and As and F removal potential. Increase in the weight of iron oxide nanoparticles (from 0.05 g to 0.1 g) added during the course of synthesis did not lead to a significant change in the particle size measurements nor did it increase the As and F removal capacity. Increase in the duration of calcination at 550 °C led to a corresponding increase in the particle size from 219 ± 13.31 nm to 273 ± 19.49 nm. The sorption data for As (III), As (V) fitted best to Freundlich isotherm while for F it fitted the Langmuir isotherm. Increase in the duration of calcination from lh to 3h showed increased qm values for As (V) and F. The results demonstrated that 0.05 g of iron oxide nanoparticles added during synthesis and calcination of the composites at 550 °C/3h was sufficient for optimum As and F removal.

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