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Water contamination being ubiquitous problem across the world. A significant strata of population worldwide are still struggling to get drinkable water. This demand to develop technologies to provide clean water at affordable price is unveiling the need of rigorous research in this area. There are several technologies available for removal of persistent as well as emerging pollutants from water. Nanotechnology-based technology are providing the promising solution because of its extraordinary characteristics like large surface area, low cost maintenance and reuse, etc. During the past decade, there is an advancement in the field of nanotechnology and diligent efforts of researchers in achieving milestones in developing nanosorbents, nanostructured catalytic membranes, efficient photo catalysts, bioactive nanoparticles and new filtration regime. This article gives an overview of nanotechnology applications in water purification in India with an attempt to ponder indigenous technologies for implementation. A bibliometric approach is applied to bring the indigenous technologies available. In addition, we discuss some challenges associated with the development of convincing material and building water processing plants for purification of the wastewater.

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