High fluoride content found in Khordha, Nayagarh groundwater
- Posted By
13th Nov, 2020
A study has found the high fluoride concentration in groundwater in parts of Khordha and Nayagarh districts in Odisha. This can be a serious threat to human health.
- The high fluoride concentrations have also been recorded in groundwater near geothermal regions in Telangana, Rajasthan and Gujarat.
- The region in Eastern Ghats comprises deformed metamorphic and igneous rocks, containing fluoride-bearing minerals.
- Bureau of Indian Standard permissible limit of fluoride is 1 mg / l. and some samples had more than 3.5 milligrams per litre (mg / l), much above the permissible limit.
What are the reasons behind the accumulation?
- The accumulation of fluoride in water is not due to evapotranspiration or due to calcite precipitation. Fertilizers are sources of fluoride contamination.
How it can be treated?
- Defluoridation using coagulation precipitation
- Membrane-based techniques
Why it is useful fluoride?
- Adding fluoride to the water supply reduces the incidence of tooth decay.
- Fluoride protects teeth from decay by demineralization and remineralization.
Harmful impacts of high concentration
- Dental fluorosis, Skeletal fluorosis, Neurological problems, cardiovascular problems,Fluoride poisoning. Acute, high-level exposure to fluoride can lead to:abdominal pain, excessive saliva, nausea and vomiting, seizures and muscle spasms