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The main theme of our research work is in water and soil pollution. We try addressing the pollutant distribution and its fate in the environment and further find the eco-friendly, low-cost technologies for the remediation of pollutants. 

Environmental Nanoscience

Assessment of pollutant distribution
in water and soils

Fate of pollutant in the environment

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Anthropogenic origin

Nano-pollutants, Perfluoro-alkyl compounds, plastics, dyes, persistent organic pollutants

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Natural origin

Arsenic, Fluoride, mineral colloids,

bacteria etc.

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Stability, pathways of: accmulation, exposure (trophic transfer, toxicity) and transport
 

Pollutant removal and detection

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Eco-friendly solutions for remediation of toxic metals, nanoplastics, metal oxides, pesticides

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Engineered NPs for the detection of pollutants

Portable sensors

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Functionalization/ modification towards target specificity

What are nanoparticles: Colloids in the size range of 1 to 100 nm are termed to be nanoparticles (NPs).

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1) Assessment of pollutant distribution in the environment 

  • Qualitative and quantitative analysis of pollutant distribution in

    • Water bodies (rivers, lakes, marine)

    • Soils

    • Food products (vegetables, fruits, lentils, fish etc)

 

2) Fate of pollutants in the environment:

  • Pollutants including NPs are omnipresent in the environment, originated by anthropogenic sources (metal oxides, nanoplastics, nanopesticides, etc.) or natural processes such as weathering, erosion etc. (clays, minerals, bacteria).

  • These NPs in the aqueous environment can transport to longer distances polluting the nearby aquifers or may deposit onto the substrates interacting with them. 

  • Also, because of the high surface area to volume ratio, the NPs have the property of absorbing other contaminants and can act as contaminant-carriers. Therefore, it has been very crucial to understand their deposition behavior in the porous media (soils) and at rock surfaces.

  • We further address to answer how pollutants are accumulated in the river water sediments based on the hydrogeochemistry of river and surface water bodies such as lakes, ponds

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3) Application of eco-friendly composites for pollutant remediation:

  • Nanocomposites are synthesized from agricultural waste or using modified iron nanoparticles/clays/hydroxyapatite for the remediation of contaminants such as metals, persistent organic pollutants, dyes, to treat wastewater and contaminated soil.

  • Design and development of a technique for the remediation of a pollutant based on

    • permeable reactor barrier (PRB)

    • filters for water purification (cartridge, film-based)

    • capsules 

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4) Application of engineered nanoparticles for the real-time detection of contaminants

  • We synthesize nanomaterials and functionalize them for target specificity and develop sensor that can be field deployed to detect contaminants such as pesticides, metals, nanoplastics etc. 

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