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标题：Biodiversity of Algal Flora in River Chambal at Kota, Rajasthan
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作者：R. Sundarakumar ; S. Ponnusamy
期刊名称：Nature, Environment and Pollution Technology
印刷版ISSN：0972-6268
出版年度：2013
卷号：12
期号：3
语种：English
出版社：Technoscience Publications
摘要：Fluorine is an important trace element that forms fluoride compounds. Fluoride as salt is known for bothpositive and negative effects on human health. Deficiency of fluoride leads to dental caries and excesscauses a severe disease called fluorosis. Intake of fluoride rich food is also responsible for fluorosis. WHOrecommendation for the permissible limit of fluoride is 1.5 mg/L. The saline water and salt samples collectedfrom Marakkanam, Villupuram District were studied with special reference to the fluoride content. The sampleswere drawn in the pre-monsoon period comprising eight days during May 2011. The findings revealed thatthe concentration of fluoride was between 0.9 mg/L and 1.4 mg/L, which is within the permissible limits. Theconcentration of fluoride ion increased in the salt water till the start of crystallization, which subsequentlydecreased with an increase in salt formation.