This study investigated the removal of Sb(III) and Sb(V) from aqueous media through their adsorption onto oxide minerals (goethite) under a set of conditions (initial Sb concentration, pH, reaction time, and interaction temperature). The kinetic studies suggested that the adsorption equilibriums for both Sb(III) and Sb(V) were achieved within 24 h. The adsorption data collected at three different temperatures were successfully modeled using both the Langmuir and Freundlich isotherms. The adsorption of Sb(III) onto goethite was greater than that of Sb(V) at the three investigated temperatures. The thermodynamic parameters (ΔG°, ΔH°, and ΔS°) were calculated from the dependence of the adsorption process on the reaction temperature, and the calculated parameters suggest that the adsorption of both Sb(III) and Sb(V) onto goethite is spontaneously endothermic. The adsorption of Sb(III) and Sb(V) on goethite was dependent on pH within the investigated pH range.
Research Article|August 01 2013
Removal of Sb(III) and Sb(V) from aqueous media by goethite
1State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China E-mail: email@example.com
2School of Chemistry and Environmental Engineering, Shanxi Datong University, Datong 037009, China
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Jianhong Xi, Mengchang He; Removal of Sb(III) and Sb(V) from aqueous media by goethite. Water Quality Research Journal 1 August 2013; 48 (3): 223–231. doi: https://doi.org/10.2166/wqrjc.2013.030
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