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The removal of fluoride from aqueous solution by a lateritic soil adsorption : kinetic and equilibrium studies

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Abstract
The use of natural sorbents to remove fluoride from drinking water is a promising alternative because of its low-cost and easy implementation. In this article, fluoride adsorption on a latosol soil from Misiones province (Argentina) was studied regarding kinetic and equilibrium aspects. Experiments were conducted in batch at room temperature under controlled conditions of pH 4-8) and ionic strength (1-10 mM KNO3). Experimental data indicated that adsorption processes followed a PSO kinetic where initial rates have showed to be influenced by pH solution. The necessary time to reach an equilibrium state had resulted approximately 30 min. Equilibrium adsorption studies were performed at pH 8 which is similar to the natural groundwater. For that, fluoride adsorption data were successfully adjusted to Dubinin-Ataskhov model determining that the fluoride adsorption onto soil particles mainly followed a physical mechanism with a removal capacity of 0.48 mg g(-1). Finally, a natural groundwater was tested with laterite obtaining a reduction close to 30% from initial concentration and without changing significantly the physicochemical properties of the natural water. Therefore, it was concluded that the use of lateritic soils for fluoride removal is very promising on a domestic scale.
Keywords
Adsorption, Fluoride, Groundwater, Isotherm, Kinetics, DRINKING-WATER, ARGENTINA, ADSORBENT, SORPTION, MODELS, SYSTEMS, GASES, CLAY

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MLA
Iriel, Analia et al. “The Removal of Fluoride from Aqueous Solution by a Lateritic Soil Adsorption : Kinetic and Equilibrium Studies.” ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 149 (2018): 166–172. Print.
APA
Iriel, A., Bruneel, S., Schenone, N., & Fernández Cirelli, A. (2018). The removal of fluoride from aqueous solution by a lateritic soil adsorption : kinetic and equilibrium studies. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, 149, 166–172.
Chicago author-date
Iriel, Analia, Stijn Bruneel, Nahuel Schenone, and Alicia Fernández Cirelli. 2018. “The Removal of Fluoride from Aqueous Solution by a Lateritic Soil Adsorption : Kinetic and Equilibrium Studies.” Ecotoxicology and Environmental Safety 149: 166–172.
Chicago author-date (all authors)
Iriel, Analia, Stijn Bruneel, Nahuel Schenone, and Alicia Fernández Cirelli. 2018. “The Removal of Fluoride from Aqueous Solution by a Lateritic Soil Adsorption : Kinetic and Equilibrium Studies.” Ecotoxicology and Environmental Safety 149: 166–172.
Vancouver
1.
Iriel A, Bruneel S, Schenone N, Fernández Cirelli A. The removal of fluoride from aqueous solution by a lateritic soil adsorption : kinetic and equilibrium studies. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY. 2018;149:166–72.
IEEE
[1]
A. Iriel, S. Bruneel, N. Schenone, and A. Fernández Cirelli, “The removal of fluoride from aqueous solution by a lateritic soil adsorption : kinetic and equilibrium studies,” ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY, vol. 149, pp. 166–172, 2018.
@article{8544894,
  abstract     = {The use of natural sorbents to remove fluoride from drinking water is a promising alternative because of its low-cost and easy implementation. In this article, fluoride adsorption on a latosol soil from Misiones province (Argentina) was studied regarding kinetic and equilibrium aspects. Experiments were conducted in batch at room temperature under controlled conditions of pH 4-8) and ionic strength (1-10 mM KNO3). Experimental data indicated that adsorption processes followed a PSO kinetic where initial rates have showed to be influenced by pH solution. The necessary time to reach an equilibrium state had resulted approximately 30 min. Equilibrium adsorption studies were performed at pH 8 which is similar to the natural groundwater. For that, fluoride adsorption data were successfully adjusted to Dubinin-Ataskhov model determining that the fluoride adsorption onto soil particles mainly followed a physical mechanism with a removal capacity of 0.48 mg g(-1). Finally, a natural groundwater was tested with laterite obtaining a reduction close to 30% from initial concentration and without changing significantly the physicochemical properties of the natural water. Therefore, it was concluded that the use of lateritic soils for fluoride removal is very promising on a domestic scale.},
  author       = {Iriel, Analia and Bruneel, Stijn and Schenone, Nahuel and Fernández Cirelli, Alicia},
  issn         = {0147-6513},
  journal      = {ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY},
  keywords     = {Adsorption,Fluoride,Groundwater,Isotherm,Kinetics,DRINKING-WATER,ARGENTINA,ADSORBENT,SORPTION,MODELS,SYSTEMS,GASES,CLAY},
  language     = {eng},
  pages        = {166--172},
  title        = {The removal of fluoride from aqueous solution by a lateritic soil adsorption : kinetic and equilibrium studies},
  url          = {http://dx.doi.org/10.1016/j.ecoenv.2017.11.016},
  volume       = {149},
  year         = {2018},
}

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