Council of Scientific and Industrial Research

Swati Dubey

Avanish Kumar Srivastava

Archana Singh

Akshay Singh Tomar

Priyanka Arya

Indra Bhushan Singh

A nanoadsorbent based filter is used for purification of fluoride and arsenic contaminated water. 140-150 g low cost (&#x2dc;10 USD/kg) nanoparticles of gamma alumina of 20-25 mg/g fluoride and 25-30 mg/g arsenic adsorption capacity is incorporated in propylene filter without susceptibility of leaching incorporated nanoparticles in water. The cost of domestic defluoridation device containing low cost nanoalumina incorporated filters/cartridges along with housing, overhead tank, tubing and treated water storage container etc. is of very low cost of around 25 USD/device. The fluoride treatment cost would be &#x3c;0.5 USD/100 lit for 4-5 mg/l fluoride water after 2-3 regenerations while, the arsenic treatment cost using domestic filtration device would be &#x3c;0.25 USD/100 lit for 90-100 &#x3bc;g/l arsenic (III) water. A method incorporates nanoadsorbent in a sediment removal filter candle and provides a household defluoridation device capable of treatment of fluoride and arsenic contaminated ground/drinking water without electricity.

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Madhya Pradesh, India

Swati Dubey