An estimation of mercury usage and release from the Dental Sector in India. The estimated annual use of mercury in this sector stands around 65 tons, where 49 tons gets into cavities and 16.2 tons is mostly thrown into the environment as non-contact amalgam. The estimated annual mercury release due to removal or replacement of old fillings (contact amalgam) is 66 ton. This entire amount would mostly end up in municipal bins and thus soil and groundwater contamination. These two mediums are also rich in micro-organisms responsible for methylation of mercury
This report was undertaken in the wake of the global phase out of mercury from chlorine and caustic soda producing Chlor-alkali plants. The challenges were brought to light in the voluntary transformation of mercury based electrolysis cell with membrane cell in the country.