Nature Environment and Pollution Technology

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Analysis of Fluoride Ion Concentration from Salt Pans of Marakkanam, Villupuram District, Tamil Nadu


Affiliations
1 Department of Chemistry, Vivekananda Kendra Vidyalaya, Kanyakumari-629 702, T. N., India
2 P. G. & Research Department of Chemistry, Sri Paramakalyani College, Alwarkurichi-627 412, T. N., India
 

Fluorine is an important trace element that forms fluoride compounds. Fluoride as salt is known for both positive and negative effects on human health. Deficiency of fluoride leads to dental caries and excess causes a severe disease called fluorosis. Intake of fluoride rich food is also responsible for fluorosis. WHO recommendation for the permissible limit of fluoride is 1.5 mg/L. The saline water and salt samples collected from Marakkanam, Villupuram District were studied with special reference to the fluoride content. The samples were drawn in the pre-monsoon period comprising eight days during May 2011. The findings revealed that the concentration of fluoride was between 0.9 mg/L and 1.4 mg/L, which is within the permissible limits. The concentration of fluoride ion increased in the salt water till the start of crystallization, which subsequently decreased with an increase in salt formation.
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  • Analysis of Fluoride Ion Concentration from Salt Pans of Marakkanam, Villupuram District, Tamil Nadu

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Authors

R. Sundarakumar
Department of Chemistry, Vivekananda Kendra Vidyalaya, Kanyakumari-629 702, T. N., India
S. Ponnusamy
P. G. & Research Department of Chemistry, Sri Paramakalyani College, Alwarkurichi-627 412, T. N., India

Abstract


Fluorine is an important trace element that forms fluoride compounds. Fluoride as salt is known for both positive and negative effects on human health. Deficiency of fluoride leads to dental caries and excess causes a severe disease called fluorosis. Intake of fluoride rich food is also responsible for fluorosis. WHO recommendation for the permissible limit of fluoride is 1.5 mg/L. The saline water and salt samples collected from Marakkanam, Villupuram District were studied with special reference to the fluoride content. The samples were drawn in the pre-monsoon period comprising eight days during May 2011. The findings revealed that the concentration of fluoride was between 0.9 mg/L and 1.4 mg/L, which is within the permissible limits. The concentration of fluoride ion increased in the salt water till the start of crystallization, which subsequently decreased with an increase in salt formation.