Uptake of Arsenic(V) Using Alumina Functionalized Highly Ordered Mesoporous SBA-15 (Al x ‑SBA-15) as an Effective Adsorbent

The SBA-15 (a mesoporous SiO2 material) decorated with 10% aluminum (Al10-SBA-15) was found to be an excellent adsorbent to remove As­(V) from water. The highly dispersed aluminum species have been obtained over the well-ordered mesoporous Al10-SBA-15 adsorbent and act as the active adsorption sites...

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Bibliographic Details
Published in:Journal of chemical and engineering data 2015-05, Vol.60 (5), p.1309-1319
Main Authors: He, Sufang, Han, Caiyun, Wang, Hua, Zhu, Wenjie, He, Suyun, He, Dedong, Luo, Yongming
Format: Article
Language:English
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Summary:The SBA-15 (a mesoporous SiO2 material) decorated with 10% aluminum (Al10-SBA-15) was found to be an excellent adsorbent to remove As­(V) from water. The highly dispersed aluminum species have been obtained over the well-ordered mesoporous Al10-SBA-15 adsorbent and act as the active adsorption sites for arsenic­(V) removal instead of SiO2. The adsorption behavior of As­(V) onto Al10-SBA-15 was investigated in aqueous solution using various experimental parameters. The adsorption data of As­(V) could be fitted more successfully by the Langmuir isotherm than the Freundlich isotherm model, and the pseudo-second-order equation described this entire adsorption process well. It is found from the analysis of kinetic data with the intraparticle diffusion mode that both the boundary layer (film) diffusion and intraparticle diffusion may contribute to the rate-limiting steps. Importantly, Al10-SBA-15 exhibits high arsenic­(V) removal in the wide pH range of 2.0–8.2 and can remove As­(V) from water containing arsenate of ≤2.235 mg·L–1 to reach levels in accordance with the regulations for drinking water purposes (
ISSN:0021-9568
1520-5134
DOI:10.1021/je500978k