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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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.
|Subjects:||Engineering > Nanotechnology applications in civil engineering|
Engineering > Nanotechnology applications in mechanical engineering
|Deposited On:||02 Sep 2012 13:17|
|Last Modified:||02 Sep 2012 13:18|
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