Adsorption of Fluoride on Lanthanum or Cerium Modified Mesoporous Alumina

被引：0

作者：

Liu D. ^{[1
]}

Liu H. ^{[1
]}

Yang L. ^{[1
]}

Luo Y. ^{[1
]}

Han C. ^{[1
]}

机构：

[1] Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming

来源：

Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Adsorption; Cerium; Fluoride; Lanthanum; Mesoporous alumina; Modified;

D O I：

10.11896/cldb.201904005

中图分类号：

学科分类号：

摘要：

Nowadays, a kind of highly efficient fluoride adsorbent has that employ La, Ce as the modifier to the surface of certain carriers has aroused wide concerns. However, the loading of La and Ce into mesoporous alumina(MA) is rarely reported. In this study, La and Ce modified mesoporous alumina were prepared they were used for the removal of fluorine. The structural properties of the adsorbent were characterized by N2 desorption isotherm, X-ray diffraction(XRD) and Fourier transform infrared spectroscopy(FTIR). Furthermore, the effects of contact time, initial concentration and pH value on the adsorption of fluoride were investigated. The results showed that the adsorption equilibrium had been achieved at 150 min, with the fluorine removal rate of 92.2%(La/MA). The order of fluorine adsorption capacity was La/MA>Ce/MA>MA. The fluorine adsorption capacity increased with the increase of initial concentration. Satisfactory fluorine removal effect could be acquired under the pH value of 5-9. The adsorption isotherm equation was in accordance with the Langmuir adsorption isotherm model. The La/MA exhibited a maximum adsorption capacity of 27.9 mg/g. The degree of influence of co-existing anions on fluoride removal followed the order of CO32->SO42->NO3->Cl-. Finally, by comparing the FTIR before and after adsorption, it could be seen that La/MA exerted the best effect on fluoride removal. © 2019, Materials Review Magazine. All right reserved.

引用

页码：590 / 594

页数：4

共 48 条

[21]

Zhang S.Y., Lu Y., Lin X.Y., Et al., Applied Surface Science, 303, 5, (2014)

[22]

Cheng J.M., Meng X.G., Jing C.Y., Et al., Journal of Hazardous Materials, 278, (2014)

[23]

Yu Y., Wang C.H., Guo X., Et al., Journal of Colloid & Interface Science, 441, (2015)

[24]

Sing K.S.W., Pure & Applied Chemistry, 57, 4, (2009)

[25]

Nazari M., Halladj R., Journal of the Taiwan Institute of Chemical Engineers, 45, 5, (2014)

[26]

Chen Y., Zhang L., Liu Z., Et al., Hans Journal of Chemical Engineering and Technology, 7, 6, (2017)

[27]

Hou H., Xie Y., Yang Q., Food Research & Development, 16, 16, (2005)

[28]

Chen Y.M., Wang M.K., Huang P.M., Et al., Geoderma, 152, 3-4, (2009)

[29]

Viswanathan N., Meenakshi S., Journal of Colloid & Interface Science, 322, 2, (2008)

[30]

Brito A., Borges M.E., Garin M., Et al., Energy Fuels, 23, 6, (2009)

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