Removal of fluoride from aqueous solution by adsorption on lanthanum modified attapulgite

DOI

10.2991/meic-14.2014.329How to use a DOI?

Keywords

Lanthanum modified attapulgite; Adsorption; Desorption; Fluoride

Abstract

Fluoride pollution in natural water may create severe threats for human health. In this study, lanthanum modified attapulgite (La-ATP) was synthesized and used as a novel adsorbent for removal of fluoride in aqueous solution.Characterized results showed that the mass content of Lanthanum oxide was 3.30%. La-ATP exhibited high adsorption affinity for aqueous fluoride and the maximum adsorption amounts were 16.92, 22.03 and 25.91mg/g at 15, 25 and 35 oC, respectively. Adsorption kinetic followed pseudo-second kinetics model and adsorption rates decreased with increasing initial concentration of fluoride. The amount adsorbed of fluoride onto La-ATP decreased generally with increasing solution pH. The presence of coexisted anions in water decreased the adsorption amount of fluoride by competitive adsorption. Fluoride loaded La-ATP can be easily desorbed in alkaline solution and the regenerated adsorbent still possessed high adsorption capacity for aqueous fluoride. The results implied that La-ATP may be an efficient adsorbent for the removal of aqueous fluoride.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Jiahong Wang
AU  - Xiaolong Yin
PY  - 2014/11
DA  - 2014/11
TI  - Removal of fluoride from aqueous solution by adsorption on lanthanum modified attapulgite
BT  - Proceedings of the 2014 International Conference on Mechatronics, Electronic, Industrial and Control Engineering
PB  - Atlantis Press
SP  - 1462
EP  - 1466
SN  - 2352-5401
UR  - https://doi.org/10.2991/meic-14.2014.329
DO  - 10.2991/meic-14.2014.329
ID  - Wang2014/11
ER  -