GQD embedded bacterial cellulose nanopaper based multi-layered filtration membranes assembly for industrial dye and heavy metal removal in wastewater

The graphene based materials in water pollutant treatment have recently gained significant attention due to their high surface area, high mechanical strength and tuneable surface chemistry. However, the relatively high cost, poor hydrophobicity, low adsorption capacity, and recyclability limit their...

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Bibliographic Details
Published in:Cellulose (London) 2021-11, Vol.28 (16), p.10385-10398
Main Authors: Pandya, Alok, Shah, Khush, Prajapati, Harsh, Vishwakarma, Gajendra Singh
Format: Article
Language:English
Subjects:
Adsorption
Assembly
Bioorganic Chemistry
Cellulose
Ceramics
Chemical synthesis
Chemistry
Chemistry and Materials Science
Composites
Controllability
Dyes
Filtration
Glass
Graphene
Heavy metals
Hydrophobicity
Lead
Membranes
Multilayers
Natural Materials
Organic Chemistry
Original Research
Physical Chemistry
Pollutants
Polymer Sciences
Pyrolysis
Quantum dots
Recyclability
Regeneration
Surface chemistry
Sustainable Development
Wastewater treatment
Water purification
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Summary:The graphene based materials in water pollutant treatment have recently gained significant attention due to their high surface area, high mechanical strength and tuneable surface chemistry. However, the relatively high cost, poor hydrophobicity, low adsorption capacity, and recyclability limit their practical application. Here in, driven by need, we report a simple approach for the synthesis of graphene quantum dots (GQDs) via pyrolysis, preferred because of high controllability and fewer defects over chemical exfoliation methods. The synthesized GQDs are further embedded on bacterial cellulose nanopaper (BCN) and characterized using spectroscopy and microscopy techniques. Furthermore, the well-ordered multi-layered GQD embedded BCN based filtration assembly is designed and developed for treatment of water pollutants and industrial dye wastewater. The multi-layered GQD embedded BCN based filtration assembly is validated by purifying industrial dye and heavy metal (Hg 2+ , Pb 2+ ) with removal efficiency of 99.6% and 97%, respectively. Our multi-layered filtration assembly demonstrated significant membrane regeneration capacity until six cycles. The isotherm model also showed an appropriate fit exhibiting good adsorption behaviour. Our multi-layered filtration assembly can be established as a promising filtration assembly for inexpensive, efficient and low energy applications in wastewater treatment. Graphic abstract
ISSN:0969-0239
1572-882X
DOI:10.1007/s10570-021-04174-1