Merck
  • Home
  • Search Results
  • Fluoride adsorption properties of three modified forms of activated alumina in drinking water.

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

Journal of water and health (2014-12-05)
Ying Duan, Chenchen Wang, Xuede Li, Wei Xu
ABSTRACT

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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Aluminum oxide, nanopowder, <50 nm particle size (TEM)
Supelco
Aluminum oxide, for the determination of hydrocarbons
Supelco
Aluminum oxide, activated, neutral, Brockmann Activity I
Sigma-Aldrich
Aluminum oxide, 99.997% trace metals basis
Sigma-Aldrich
Aluminum oxide, nanowires, diam. × L 2-6 nm × 200-400 nm
Sigma-Aldrich
Iron(III) chloride solution, 0.2 M in 2-methyltetrahydrofuran
Sigma-Aldrich
Aluminum oxide, nanopowder, 13 nm primary particle size (TEM), 99.8% trace metals basis
Sigma-Aldrich
Aluminum oxide, nanoparticles, <50 nm particle size (DLS), 20 wt. % in isopropanol
Millipore
TDA Reagent, suitable for microbiology
Sigma-Aldrich
Aluminum oxide, nanoparticles, 30-60 nm particle size (TEM), 20 wt. % in H2O
Sigma-Aldrich
Aluminum oxide, single crystal substrate, <0001>
Sigma-Aldrich
Aluminum oxide, activated, neutral, Brockmann I, free-flowing, Redi-Dri
Sigma-Aldrich
Aluminum oxide, activated, acidic, Brockmann I, free-flowing, Redi-Dri
Sigma-Aldrich
Aluminum oxide, fused, powder, primarily α-phase, -325 mesh
Sigma-Aldrich
Aluminum oxide, fused, powder, primarily α-phase, 100-200 mesh
Sigma-Aldrich
Aluminum oxide, pellets, 3 mm
Sigma-Aldrich
Aluminum oxide, Corundum, α-phase, -100 mesh
Sigma-Aldrich
Aluminum oxide, powder, 99.99% trace metals basis
Sigma-Aldrich
Aluminum oxide, calcined, powder, primarily α-phase, 100-325 mesh
Sigma-Aldrich
Aluminum oxide, Type CG-20
Sigma-Aldrich
Aluminum oxide, Type WN-6, Neutral, Activity Grade Super I
Sigma-Aldrich
Aluminum oxide, powder, primarily α phase, ≤10 μm avg. part. size, 99.5% trace metals basis
Sigma-Aldrich
Aluminum oxide, pore size 58 Å, ~150 mesh
Sigma-Aldrich
Iron(III) chloride solution, purum, 45% FeCl3 basis
Sigma-Aldrich
Aluminum oxide, activated, basic, Brockmann I
Sigma-Aldrich
Aluminum oxide, activated, acidic, Brockmann I
Sigma-Aldrich
Aluminum oxide, activated, neutral, Brockmann I
Sigma-Aldrich
Iron(III) chloride, anhydrous, powder, ≥99.99% trace metals basis
Sigma-Aldrich
Aluminum oxide, mesoporous, MSU-X (wormhole), average pore size 3.8 nm
Sigma-Aldrich
Iron(III) chloride, sublimed grade, ≥99.9% trace metals basis