Fluoride Removal by Lanthanum Alginate Bead: Adsorbent Characterization and Adsorption Mechanism

霍亚坤; 丁文明; 黄霞; 徐静年; 赵梦华

doi:10.1016/S1004-9541(09)60222-6

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Fluoride Removal by Lanthanum Alginate Bead: Adsorbent Characterization and Adsorption Mechanism

Updated：2026-01-06

- Fluoride Removal by Lanthanum Alginate Bead: Adsorbent Characterization and Adsorption Mechanism
- Chinese Journal of Chemical Engineering Vol. 19, Issue 3, Pages: 365-370(2011)
- Affiliations：
  
  1. College of Chemical Engineering, Beijing University of Chemical Technology,Beijing,China,100029
  2. School of Environment, Tsinghua University,Beijing,China,100084
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(09)60222-6
  CLC：
- Published：2011
- Accepted：
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HUO Yakun, DING Wenming, HUANG Xia, XU Jingnian, ZHAO Menghua. Fluoride Removal by Lanthanum Alginate Bead: Adsorbent Characterization and Adsorption Mechanism[J]. , 2011, 19(3): 365-370.
DOI：

HUO Yakun, DING Wenming, HUANG Xia, XU Jingnian, ZHAO Menghua. Fluoride Removal by Lanthanum Alginate Bead: Adsorbent Characterization and Adsorption Mechanism[J]. , 2011, 19(3): 365-370. DOI： 10.1016/S1004-9541(09)60222-6.

摘要

Abstract

Lanthanum alginate bead is a new

highly active adsorbent. In the present study

we investigated its adsorption performance and its adsorption mechanism. The adsorption isotherm for fluoride onto lanthanum alginate b ead fits the Langmuir model well

and the maximum adsorption capacity is 197.2 mg·g

-1

. X-ray diffraction shows the amorphous nature of lanthanum alginate bead

which allows for better accessibility to fluoride and thus better activity. Infrared spectra of lanthanum alginate bead before and after adsorption confirm its stable skeletal structure. Scanning electron microscopy shows that the dense surface structure of the adsorbent appear cracks after adsorption. T he adsorption mechanism of lanthanum alginate bead is considered as an ion exchange between F

and Cl

or OH

as verified from the adsorbent and the solution by pH effect

energy dispersive X-ray

and ion chromatography.

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