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Recovery of Sb from Aqueous Solution as Cubic Sbsub.2Osub.3 by Fluidized-Bed Granulation Process
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Recovery of Sb from Aqueous Solution as Cubic Sbsub.2Osub.3 by Fluidized-Bed Granulation Process
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Journal Article
Recovery of Sb from Aqueous Solution as Cubic Sbsub.2Osub.3 by Fluidized-Bed Granulation Process
2024
Overview
In order to recover the antimony from wastewater, a custom-designed fluidized-bed reactor (FBR) was employed to treat antimony-containing wastewater. By single-factor experiments, the effects of the solution pH, the molar ratio of [TA]/[Sb[sup.3+]], the seed size and dosage, the up-flow velocity (U), and the hydraulic retention time (HRT) on antimony recovery were investigated based on the antimony removal and granulation efficiency. The optimum conditions for antimony recovery were obtained at pH 9.0, the molar ratio of [TA]/[Sb[sup.3+]] of 2, 6 g/L of 13–38 μm Sb[sub.2]O[sub.3] as the fluidized seed, and the U and HRT of 42 m/h and 40 min, respectively; the antimony removal and granulation efficiency reached 95% and 91%, respectively. The granular products were analyzed by an X-ray polycrystalline diffractometer (XRD) and scanning electron microscopy (SEM) as cubic Sb[sub.2]O[sub.3], widely used in various industries. The fluidized-bed reactor was operated continuously for 7 days, during which the antimony removal and granulation efficiency were stable at 96% and 93%, respectively. This study demonstrated the feasibility of the fluidized-bed granulation process for the recovery of antimony from wastewater. It provides a novel approach for retrieving and managing antimony-containing wastewater.
Publisher
MDPI AG
