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Defluoridation of drinking water and rainwater harvesting using a solar still / L. Anjaneyulu in Industrial & engineering chemistry research, Vol. 51 N° 23 (Juin 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 8040–8048 Titre : Defluoridation of drinking water and rainwater harvesting using a solar still Type de document : texte imprimé Auteurs : L. Anjaneyulu, Auteur ; E. Arun Kumar, Auteur ; Ravi Sankannavar, Auteur Année de publication : 2012 Article en page(s) : pp. 8040–8048 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Defluoridation  Water Résumé : When people drink water having a fluoride (F–) concentration >1–1.5 mg/L for a long period of time, various ailments that are collectively referred to as fluorosis occur. Based on the design of Thomas (http://www.planetkerala.org), an inclined basin-type solar still containing sand and water has been used at Bangalore for defluoridation. For water samples having a fluoride concentration in the range 5–20 mg/L, the fluoride concentration in the distillate was usually <1.5 mg/L. During the periods October 2006–May 2007 and October 2007–May 2008, the volume of distillate showed a significant diurnal variation, ranging from 0.3 to 4.0 L/m2·day. Based on the figures for 2006, the cost of the still was about Rs. 850 (US$16) for collector areas in the range 0.50–0.57 m2. The occurrence of F– in the distillate merits further investigation. Overall, the still effectively removes F–, but a large area of the collector, in the range 2.5–25 m2, is needed to produce about 10 L of distilled water for cooking and drinking. Rainwater falling on the upper surface of the still was collected, and its fluoride concentration was found to be below the desirable limit of 1 mg/L. Hence it can also be used for cooking and drinking. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201692q [article] Defluoridation of drinking water and rainwater harvesting using a solar still [texte imprimé] / L. Anjaneyulu, Auteur ; E. Arun Kumar, Auteur ; Ravi Sankannavar, Auteur . - 2012 . - pp. 8040–8048. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 8040–8048 Mots-clés : Defluoridation  Water Résumé : When people drink water having a fluoride (F–) concentration >1–1.5 mg/L for a long period of time, various ailments that are collectively referred to as fluorosis occur. Based on the design of Thomas (http://www.planetkerala.org), an inclined basin-type solar still containing sand and water has been used at Bangalore for defluoridation. For water samples having a fluoride concentration in the range 5–20 mg/L, the fluoride concentration in the distillate was usually <1.5 mg/L. During the periods October 2006–May 2007 and October 2007–May 2008, the volume of distillate showed a significant diurnal variation, ranging from 0.3 to 4.0 L/m2·day. Based on the figures for 2006, the cost of the still was about Rs. 850 (US$16) for collector areas in the range 0.50–0.57 m2. The occurrence of F– in the distillate merits further investigation. Overall, the still effectively removes F–, but a large area of the collector, in the range 2.5–25 m2, is needed to produce about 10 L of distilled water for cooking and drinking. Rainwater falling on the upper surface of the still was collected, and its fluoride concentration was found to be below the desirable limit of 1 mg/L. Hence it can also be used for cooking and drinking. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201692q