Data for the synthesis, characterization, and use of xerogels as adsorbents for the removal of fluoride and bromide in aqueous phase

Published: 31 March 2022| Version 1 | DOI: 10.17632/8n273cwggf.1
Contributors:
Nahum Andres Medellin Castillo,
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Description

Xerogels were synthesized using the methodology proposed by Muehlemann et al. The xerogels M/R=0.5 were carbonized in a horizontal tubular furnace Carbolite model 12/65/550 under a N2 flow at 400, 450, and 550 °C for 2 h. The equilibrium adsorption experiments were carried out in a batch adsorber using 0.02 g of carbonized xerogel, 50 mL of fluoride, or bromide solution with different initial concentrations ranging from 10 to 100 mg L-1. The experiments were carried out at constant pH. The mass of fluoride or bromide adsorbed per gram of adsorbent (q), was obtained using a mass balance equation. The adsorption equilibrium data were fitted by Langmuir, Freundlich and Prausnitz-Radke isotherm models.The bromide and fluoride concentration in aqueous solution was measured by a potentiometric method with a bromide or fluoride ion-selective electrode.

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Institutions

Universidad Nacional de Colombia, Instituto Potosino de Investigacion Cientifica y Tecnologica, Universidad Autonoma de San Luis Potosi, Universidad Autonoma de Ciudad Juarez, Universidad de los Andes

Categories

Adsorption, Adsorbent, Water, Fluoride, Xerogels

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