Aluminum and calcium effects on the adsorption of fluoride ions by corrosion products

被引：13

作者：

Garcia-Sanchez, J. J. ^{[1
,3
]}

Martinez-Miranda, V. ^{[2
]}

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

机构：

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

[2] Univ Autonoma Estado Mexico, Fac Ingn, Ctr Interamer Recursos Agua, Toluca, Estado De Mexic, Mexico

[3] Univ Autonoma Estado Mexico, Fac Quim, Toluca 50000, Estado De Mexic, Mexico

来源：

JOURNAL OF FLUORINE CHEMISTRY | 2013年 / 145卷

关键词：

Fluoride; Corrosion products; Aluminum; Adsorption; DRINKING-WATER; AQUEOUS-SOLUTIONS; REMOVAL; DEFLUORIDATION; MAGNESIUM; GOETHITE; KINETICS; NICKEL; COBALT; BATCH;

D O I：

10.1016/j.jfluchem.2012.11.001

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Corrosion products from a hydraulic distribution system of drinking water were obtained, grounded and sifted to a particle size between 0.297 and 0.149 mm. The oxides were modified with aluminum sulfate, calcium hydroxide and aluminum nitrate. The sorption of fluoride ions was studied in a batch system using aluminum and calcium modified materials and the sorption capacities were determined for each material. It was found that the adsorption capacities depend mainly on the content of aluminum in the samples. The kinetic behavior and isotherms were determined with the modified material that gave the highest fluoride sorption capacity using fluoride solutions and drinking water containing naturally fluoride ions. The sorption equilibrium was reached in 24 h and the kinetic results were adjusted to the pseudo-second order model indicating a chemisorption mechanism. A typical isotherm was observed for drinking water, which corresponds to adsorbents that have a wide range of pore sizes. The adsorption capacities determined for drinking water and fluoride solutions were 7.45 and 9.75 mg/g. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：136 / 140

页数：5

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