Adsorption of Sb(III) and Sb(V) on Freshly Prepared Ferric Hydroxide (FeOxHy)

Environmental Engineering Science
Zan HeJiuhui Qu

Abstract

This study prepared fresh ferric hydroxide (in-situ FeOxHy) by the enhanced hydrolysis of Fe(3+) ions, and investigates its adsorptive behaviors toward Sb(III) and Sb(V) through laboratory and pilot-scale studies. A contact time of 120-min was enough to achieve adsorption equilibrium for Sb(III) and Sb(V) on the in-situ FeOxHy, and the Elovich model was best to describe the adsorption kinetics of Sb(III) and Sb(V). The Freundlich model was better than Langmuir model to describe the adsorption of Sb(III) and Sb(V) on the in-situ FeOxHy, and the maximum adsorption capacity of Sb(III) and Sb(V) was determined to be 12.77 and 10.21 mmol/g the in-situ FeOxHy as Fe, respectively. Adsorption of Sb(V) decreased whereas that of Sb(III) increased with elevated pH over pH 3-10, owing to the different electrical properties of Sb(III) and Sb(V). Adsorption of Sb(III) and Sb(V) was slightly affected by ionic strength, and thus indicated the formation of inner sphere complexes between Sb and the adsorbent. Sulfate and carbonate showed little effect on the adsorption of Sb(III) and Sb(V). Phosphate significantly inhibited the adsorption of Sb(V), whereas slightly effected that of Sb(III) due to its similar chemical structure to Sb(V). Pilot-sc...Continue Reading

Citations

May 18, 2017·Environmental Technology·Hailin YangMengchang He
Feb 23, 2018·Environmental Science and Pollution Research International·Shruti Mishra, Nalini Sankararamakrishnan
Oct 10, 2019·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Richard I FosterKeun-Young Lee
Jan 16, 2021·Journal of Hazardous Materials·Martin UríkPeter Matúš
Jan 9, 2019·Environmental Science & Technology·Yanbiao LiuWolfgang Sand

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