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Bromate removal from aqueous solutions by nano crystalline akaganeite (beta-FeOOH)-coated quartz sand (CACQS)

Xu, Chunhua and Shi , Junjun and Zhou, Weizhi and Gao, Baoyu and Yue, Qinyan and Wang, Xiaohong (2012) Bromate removal from aqueous solutions by nano crystalline akaganeite (beta-FeOOH)-coated quartz sand (CACQS). ScienceDirect, 187 . pp. 63-68. ISSN 1385-8947

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Abstract

We investigated the feasibility of nano crystalline akaganeite (beta-FeOOH)-coated quartz sand (CACQS) for bromate removal from aqueous solutions. Batch experiments were carried out a; a function of various operational conditions such as adsorbent dosage (20-160 g/L), initial pH (3-12), cot tact time (1-240 min), initial bromate concentration (0.6-10 mg/L) and temperature (288 K, 298 K and 303 K). The uptake rate of bromate was rapid and the adsorption was almost saturated within 20 min. The adsorption kinetics can be described by the pseudo-second-order equation. The maximum adsorption capacity of the adsorbent for bromate removal was 37.8 mu g/g at 298 K. The data fit well with the Langmuir model. Optimum bromate removal was observed between pH 3 and 10. Analysis of the adsorption thermodynamics showed that the adsorption of bromate by CACQS was spontaneous, exothermic and occurred due to physisorption. (C) 2012 Elsevier E.V. All rights reserved.

Item Type:Article
Subjects:Engineering > Nanotechnology applications in civil engineering
Engineering > Nanotechnology applications in mechanical engineering
ID Code:11888
Deposited By:CSMNT
Deposited On:02 Sep 2012 13:17
Last Modified:02 Sep 2012 13:18

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