Effect of grain size and interfering anion species on the removal of fluoride by hydrotalcite-like compounds

被引：17

作者：

Jimenez-Nunez, M. L. ^{[2
]}

Solache-Rios, M. ^{[1
]}

Chavez-Garduno, J. ^{[2
]}

Olguin-Gutierrez, M. T. ^{[1
]}

机构：

[1] Inst Nacl Invest Nucl, Dept Quim, Mexico City 11801, DF, Mexico

[2] Inst Tecnol Toluca, Mexico City 52140, DF, Mexico

来源：

CHEMICAL ENGINEERING JOURNAL | 2012年 / 181卷

关键词：

Fluoride; Hydrotalcite-like-compound; Chloride; Sulfate; Arsenic; AQUEOUS-SOLUTIONS; DRINKING-WATER; MAGNESIUM; SORPTION; IONS; DEFLUORIDATION; COPPER(II); BEHAVIOR; SURFACE; NICKEL;

D O I：

10.1016/j.cej.2011.11.097

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Nickel and magnesium hydrotalcite-like compounds (NiAlHT, MgAlHT) were investigated to remove fluoride ions from aqueous solutions in batch system. F- ions were determined in the remaining solutions using a fluoride ion selective electrode. Kinetic of the fluoride sorption from aqueous solutions by nickel hydrotalcite-like compound with different grain size were determined as well as the effects of Cl-. SO42- and As(V) on the sorption kinetic. It was found that the adsorption rate is the highest using grains samples of 25-50 mesh and in about 600 min the equilibrium was reached in all systems; the results were best fitted to the Elovich rate model equation which indicates that the sorption mechanism is trough a chemisorption process. Other anions interfere on the F- adsorption from bicomponenr aqueous solution by NiAlHT and MgAlHT. NiAIHT is more efficient than MgAlHT to remove fluoride from the aqueous solutions. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：371 / 375

页数：5

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