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Defluoridation of drinking water using a composite based on stilbite from Ethiopia

AuthorsGómez-Hortigüela Sainz, Luis ; Agudo, E.; Pérez Pariente, Joaquín ; Sani, Taju; Chebude, Yonas; Díaz Carretero, Isabel
Issue Date8-Jun-2014
Citation9th International Conference on the Occurrence, Properties, and Utilization of Natural Zeolites (2014)
AbstractThe presence of fluoride in drinking water can be beneficial or harmful for human health depending on the concentration. At concentrations in water ranging between 1.0 and 1.5 mg/L, fluoride is beneficial, especially for childr en, for the calcificat ion of the dental enamel. In contrast, a too high ingestion of fluoride can lead to dental and/or skeletal fluorosis (Fawell et al., 2006). The World Health Organisation (WHO) predicted in 1984 that more than 260 million people consume water with a concentration of fluoride higher than 1.0 mg/L. Hence, the development of technologies, preferab!y low-cost and environmentally-friendly, capable of reduc ing the fluoride concentration below the limit established by WHO (1.5 mg/L) represents nowadays a world-wide crucia l target. Various defluoridation method s have been applied to remove excessive fluoride from drinking water and prevent the associated health problems (Jagtap et al., 2012). Among them, adsorption processes are generally considered attractive in terms of their effectiveness, convenience, accessibility, availabil ity of a wide range of adsorbents, ease of operation, simplicity of design, and for econom ic and environm ental reasons (Loganathan et al., 2013). Natural zeolites have potential for defluoridation; however they have rarely shown acceptable defluoridation capacity as raw materials (Gómez­ Hortigüela et al., 2013). In this study we have grown nanohydroxyapatite (nHAp) crystals on the surface of natural stilbite from Ethiopia to further evaluare its defluoridation capacity.
DescriptionTrabajo presentado en el 9th International Conference on the Occurrence, Properties, and Utilization of Natural Zeolites, celebrado en Belgrado (Serbia) del 08 al 13 de junio de 2014.
Appears in Collections:(ICP) Comunicaciones congresos
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