Comparative evaluation of dental and skeletal fluorosis in an endemic fluorosed district, Salem, Tamil Nadu

An investigation was undertaken in 10 villages (28 samples) of Basavan-Bagewadi taluka and 11 villages (38 samples) of Muddebihal taluka of Bijapur district to assess fluoride and other physicochemical parameters. And also to assess the clinical symptoms like dental and skeletal fluorosis, joint pains and gastrointestinal diseases and to find out the severity of the disease. A check list developed with the help of available literature and in consolation with nutritionists was used to record clinical symptoms. A sample survey was made after examination for both sexes between the age of 8-50 years at Basavan-Bagewadi and Muddebihal taluka. Fluoride content varies from 0.40-6.40 mg/L and 1.10-7.10 mg/L. However 12 samples were within the range, while 16 samples were above the permissible limits at Basavan-Bagewadi Taluka where as in Muddebihal taluka all the values are above the permissible limits of WHO respectively. The results show that, out of the 2992 examined 824 (25.89%) people have dental and skeletal fluorosis, 274 (9.15%) people have joint pains, 167 (5.58%) have gastrointestinal discomfort and excessive thirst at different stages in Basavan-Bagewadi taluka. Among 2696 examined, 812(29.49%) people had dental and skeletal fluorosis, 432 (16.18%) people had joint pains, 415 (15.54%) people had gastrointestinal discomfort and excessive thirst at Muddebihal taluka of Bijapur district.

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Initial fluoride concentration and loading capacity in defluoridation with bauxite, gypsum, magnesite and their composite

Journal of Water Sanitation and Hygiene for Development ◽

10.2166/washdev.2014.025 ◽

2014 ◽

Vol 4 (2) ◽

pp. 200-205 ◽

Cited By ~ 1

Author(s):

Bernard Thole

Keyword(s):

Fluoride Concentration ◽

Power Relation ◽

Loading Capacity ◽

Skeletal Fluorosis ◽

Raw Water ◽

Initial Concentration ◽

Dental And Skeletal Fluorosis ◽

The Media ◽

Composite Filter ◽

Logarithmic Relation

One of the parameters that impact on fluoride sorption capacities of materials in water defluoridation is initial concentration. Water from various sources will have different fluoride concentrations; as such the employment of a particular media in defluoridation requires information on how the media will perform in different concentrations. Consequently, research was carried out to determine how initial fluoride concentrations in raw water affect capacity in defluoridation with bauxite, gypsum, magnesite and their composite, and to investigate the possibility of predicting loading capacity of their composite filter through initial fluoride concentration to optimize their application in defluoridation. The results showed that sorption capacities increased with increase in initial concentrations. However, higher starting concentrations resulted in larger residual fluoride concentrations; as such the benefit of large sorption capacities obtained was overshadowed. Polynomial relations of capacity (Cs, mg/g) and initial concentration (Co, mg/l), were obtained for bauxite and gypsum. Magnesite obtained a logarithmic relation for Cs and Co. A power relation was obtained between Cs and Co for their composite, Cs = 0.0328C1.20160. Approximation of capacities of this composite from initial fluoride concentrations was feasible. Water defluoridation has become important as a result of dental and skeletal fluorosis.

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