Fluoride adsorption properties of three modified forms of activated alumina in drinking water | Zendy

Ying Duan | Zendy; Chenchen Wang | Zendy; Xuede Li | Zendy; Wei Xu | Zendy

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Fluoride adsorption properties of three modified forms of activated alumina in drinking water

Author(s) -

Ying Duan,

Chenchen Wang,

Xuede Li,

Wei Xu

Publication year - 2014

Publication title -

journal of water and health

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.482

H-Index - 59

eISSN - 1996-7829

pISSN - 1477-8920

DOI - 10.2166/wh.2014.016

Subject(s) - adsorption , fluoride , chemistry , chlorine , langmuir adsorption model , ion exchange , inorganic chemistry , activated alumina , kinetics , ion , nuclear chemistry , langmuir , organic chemistry , physics , quantum mechanics

The study describes the removal of fluoride from drinking water using activated alumina (AA). AA was modified with H2SO4, FeCl3 and a combination of the two to enhance fluoride adsorption. The AA adsorbents were characterized using Brunauer-Emmett-Teller surface area analysis and X-ray fluorescence. The maximum adsorption capacity of H2SO4- and FeCl3-modified AA adsorbents was 4.98 mg/g, which is 3.4 times higher compared with that of normal AA. The results showed that the surface area of AA increased when modified with H2SO4. AA modified with FeCl3 enhanced fluoride adsorption ability through ion-exchange between chlorine ions and fluoride ions. The fluoride adsorption properties of AA modified with both H2SO4 and FeCl3 were consistent with the Langmuir model. The fluoride adsorption kinetics of the adsorbents were well described by the pseudo-second-order kinetic model.

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