Preparation and adsorption properties for fluoride of kaolinite-magnetite association

Author

Wei, Shiyong ; Yang, Xiaohong ; Xiang, Wenjun

Author_Institution

Dept. of Chem. & Environ. Eng., Hubei Univ. for Nat., Enshi, China

Volume

1

fYear

2011

fDate

29-31 July 2011

Abstract

Kaolinite-magnetite association (KMA) was prepared by co-precipitation and characterized using X-ray diffraction and surface structural analysis, and the adsorption characteristics for fluoride by KMA were studied. Compared to the average values of the pure kaolinite and magnetite, the BET surface area, external surface area and surface fractal dimension of KMA increased. The maximum adsorption capacities (qmax) for fluoride by the samples followed the order of Magnetite >; KMA >; Kaolinite, and that of KMA was much higher than the average value of kaolinite and magnetite. The adsorption data for fluoride by the three samples could be well fitted by one-site Langmuir and two-site Langmuir models (R2 =0.983-0.991), but Freundlich model can only describe the adsorption for fluoride by KMA (R2 =0.988).

Keywords

X-ray diffraction; adsorption; aluminium compounds; association; fluorine; iron compounds; precipitation (physical chemistry); surface structure; F; Fe₂O₄-Al₂Si₂O₅(OH)₄; Freundlich model; X-ray diffraction; coprecipitation; fluoride adsorption properties; kaolinite-magnetite association; maximum adsorption capacities; one-site Langmuir models; surface fractal dimension; surface structural analysis; two-site Langmuir models; Laboratories; Magnetic analysis; Magnetic properties; Surface contamination; X-ray scattering; Adsorption; Fluoride; Kaolinite; Kaolinite-magnetite association; Magnetite;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Optoelectronics (ICEOE), 2011 International Conference on

Conference_Location

Dalian, Liaoning

Print_ISBN

978-1-61284-275-2

Type

conf

DOI

10.1109/ICEOE.2011.6013133

Filename

6013133