Limestone as a sustainable remediation option for water contaminated with fluoride

Labastida, Israel; Armienta, M.A.; Beltrán, Margarita; Caballero, Gerardo; Romero, Patricia Ramírez; Rosales, Marcela Amaro

doi:10.1016/j.gexplo.2016.12.001

Cited by 19 publications

(8 citation statements)

References 25 publications

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“…En el área de estudio se ha reportado la presencia de depósitos de caolinita y material arcilloso, como zeolitas, además de calizas de la Formación Soyatal (CEAG, 2000;INEGI, 2017). Experimentalmente, estos materiales han dado buenos resultados en la disminución de altos contenidos de Fen agua subterránea (Montiel-Cota, Balcázar-Meza, Fernández-Ramírez, Morales-Munguía, & Varela-Salazar, 2013;Valenzuela, Ramírez-Hernández, Sol, & Reyes, 2011;Calderón-Mólgora, Quezada-Jiménez, Segura-Beltrán, & Hernández-Yañez, 2012;Labastida et al, 2017).…”

Section: Encuesta Epidemiológica Sin Biomarcadoresunclassified

Estimación de la exposición a elevados contenidos de fluoruro en agua potable en distintas comunidades de Guanajuato, México

Morales-Arredondo

Armienta

Rodríguez

2018

Tecnol. cienc. agua

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Dean (ID). EL rango de concentración de fluoruros en los pozos fue de 0.15 a 3.24 mg/l. Doce pozos muestreados exceden el límite permisible de calidad en relación con la concentración de fluoruros, establecido por la norma oficial mexicana NOM-127-SSA1-1994, que es de 1.5 (mg/l) en agua para consumo humano. Altas concentraciones de Fen el agua subterránea se han asociado con flujos geotérmicos ascendentes. De acuerdo con los resultados de EEF (0.01-1.8 mg/kg/d), las personas de tres asentamientos rurales con rangos de edad entre 16 y 50 años están en riesgo potencial para generar fluorosis dental; los resultados de la EEp confirmaron esta situación. El 23% de la población encuestada mostró evidencias de fluorosis dental, la mayoría gente joven; más de 50% de los individuos con evidencias de fluorosis dental tienen entre 16 y 50 años. Se considera que un factor importante para el desarrollo de fluorosis dental es el continuo consumo de agua enriquecida en fluoruros. Algunas de las personas encuestadas viven en el sitio desde hace más de 20 años.

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Section: Encuesta Epidemiológica Sin Biomarcadoresunclassified

Estimación de la exposición a elevados contenidos de fluoruro en agua potable en distintas comunidades de Guanajuato, México

Morales-Arredondo

Armienta

Rodríguez

2018

Tecnol. cienc. agua

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“…Fluoride is incorporated into limestone by surface adsorption only, which is temporary and reversible at low fluoride concentrations. While limestone has been used to filter fluoride from water, that is only effective when the limestone particle size is very small (particle sizes less than 1,500 μm) and when the aqueous fluoride concentration is relatively high (above 30 ppm; Labastida et al 2017) or even above 2,000 ppm (Fan et al 2003). The limestone fragments at Guard (see Supplemental Table 1) were much larger than those used to filter water, with a relatively low surface area, and are therefore not effective fluoride adsorbers.…”

Section: A Calcium Carbonate Concernmentioning

confidence: 99%

Growth of a Village: Using Fluoride Analysis and Artifact Frequencies to Examine Early Fort Ancient/Mississippian Household and Site Formation

Cook

Schurr

2018

Am. Antiq.

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Examining the formation histories of single-component prehistoric villages is difficult using only radiocarbon dating. This study investigates such a case with the added considerations of two relative dating techniques, artifact accumulation and fluoride dating, at the Guard site (12D29), an early (ca. AD 1000–1300) Fort Ancient/Mississippian village located in southeast Indiana. The goal was to assess the depositional history of the individual house basins and, if possible, to determine a relative sequence of construction within the village. The observed relationship between relative artifact frequencies and fluoride levels was statistically examined with the expected result being that fluoride concentrations and artifact frequencies are significantly correlated. Houses built initially contained lower relative artifact frequencies, whereas houses built more recently contained higher relative artifact frequencies. This pattern is further explored with artifact and fluoride distinctions in vertical stratigraphy, which show that some structures were slowly filled with midden trash, whereas others were more likely rapidly filled during the latter part of the village occupation, perhaps at the time of site abandonment. Overall, the results are very promising and consistent with the SunWatch site, the only other Fort Ancient culture site with a defined construction sequence, establishing a general pattern of village development in the study region.

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“…The most common fluoride-bearing precipitates to be targeted are fluoroapatite (Ca 5 (PO 4 ) 3 F) 9,[22][23][24] and fluorite (CaF 2 ). [25][26][27][28][29] In both cases, seed crystals of hydroxyapatite 9,24,30 or calcium carbonate (e.g., calcite, limestone) 22,23,25,26,28,29 are typically used to induce precipitation as well as serving as a source of calcium. Fluorite is more soluble (log(K sp ) ∼ −11) 31,32 than fluoroapatite (log(K sp ) ∼ −60), 33,34 which makes fluoroapatite precipitation more desirable.…”

Section: Introductionmentioning

confidence: 99%

Fluoride removal by calcite and hydroxyapatite

Joe-Wong

Aleman-Reyes

et al. 2023

Environ. Sci.: Water Res. Technol.

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Limestone as a sustainable remediation option for water contaminated with fluoride

Cited by 19 publications

References 25 publications

Estimación de la exposición a elevados contenidos de fluoruro en agua potable en distintas comunidades de Guanajuato, México

Estimación de la exposición a elevados contenidos de fluoruro en agua potable en distintas comunidades de Guanajuato, México

Growth of a Village: Using Fluoride Analysis and Artifact Frequencies to Examine Early Fort Ancient/Mississippian Household and Site Formation

Fluoride removal by calcite and hydroxyapatite

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