Mohapatra, Mamata and Rout, K. and Gupta, S. K. and Singh, P. and Anand, S. and Mishra, B. K. (2010) Facile synthesis of additive-assisted nano goethite powder and its application for fluoride remediation. Journal of Nanoparticle Research, 12 (2). pp. 681-686.
The present article describes a novel synthesis route for nano-sized goethite (Î±-FeOOH) using hydrazine sulphate as an additive. The X-ray diffraction (XRD) peaks of synthesized powder matched well with those of Î±-FeOOH. Transmission electron microscopy (TEM) showed the particles of irregular shape in the range of 1â10Â nm. Batch adsorption experiments for fluoride uptake were performed to study the influence of various experimental parameters such as contact time (10Â min to 7Â h), initial fluoride concentration (10â150Â mgÂ Lâ1), pH (2â11.6) and the presence of competing anions. The time data fitted well to pseudo-second-order kinetic model. The fluoride removal passed through broad maxima in pH ranges of 6â8. High adsorption capacity of 59Â mgÂ gâ1 goethite was obtained. The isothermic data fitted well to Freundlich model. The presence of other ions namely chloride and sulphate adversely affected fluoride removal. Fluoride from contaminated water sample could be successfully brought down from 10.25 to 0.5Â mgÂ Lâ1.
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||10 Feb 2010 10:02|
|Last Modified:||10 Feb 2010 10:02|
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