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Fabrication of PVA-Silver nanoparticle composite film for elimination of microbial contaminant from effluent

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Title Fabrication of PVA-Silver nanoparticle composite film for elimination of microbial contaminant from effluent
 
Creator Dutta, Ayantika
Dutta, Purbali
Kayal, Tithi
Ray, Sayoni
Dutta, Mukta
Ghosh, Krittika
Biswas, Soumi
Sarkar, Swapnaneel
Bera, Aparupa
Saha, Maharghya
Mandal, Kalyanashis
Bhar, Anirban
Paul, Samrat
 
Subject Bioremediation
BOD
Dissolved Oxygen
PVA-AgNp composite film
Silver nanoparticle
 
Description 936-939
The effluent contains many harmful microbes which should be
eliminated before it is discharged into a water body. Silver
nanoparticles (AgNPs) being high-quality significance and have a
great impact on this research field as it inhibits microbial proliferation
and infection. Therefore, it may use for Bioremediation purposes, our
laboratory is fascinated by the production of polymer matrix
entrapment silver nanoparticles for in situ bio-remediation purposes.
The AgNPs was prepared from sawdust by decoction method. The
yellowish solution turns into dark brown colour indicating the
formation of AgNPs. A sharp SPR (Surface Plasmon Resonance)
band formation in UV-vis spectroscopy scan establishes the formation
and stability of silver nanoparticles in an aqueous solution. SEM
microphotograph indicated roughly spheroidal structure with (63±3)
nm average diameters of newly synthesized AgNp. Polyvinyl alcohol
(PVA) is eco-friendly and non-toxic to the environment was chosen
for the preparation of polymeric matrix. The non-toxic concentration
(1 μg/mL) of AgNp was dispersed into PVA solution followed by
cross-linked with maleic acid. PVA- maleic acid is cross-linked by the
formation of an ester bond, whereas silver nanoparticles physically
entrap into the cross-linked matrix. The silver nanoparticles were
released from the matrix nearly after 10 min of swelling of the
composite film. In a microbial assay using E. coli agar medium,
PVA-AgNp composite film shows the significant killing of
microorganisms. Microbial elimination is measured indirectly by pH
measurement and dissolved oxygen concentration measurement of the
effluent in situ against RO- water, taken as control. The dissolved
oxygen concentration from RO water and effluent water was
measured on Day “0” followed by treatment and incubation at the
BOD chamber. The treatment with PVA-AgNp composite film
reduced the BOD Level and increase dissolved oxygen level
simultaneously increasing the quality of water.
 
Date 2022-08-30T08:23:45Z
2022-08-30T08:23:45Z
2022-09
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscpr.res.in/handle/123456789/60400
http://doi.org/10.56042/ijbb.v59i9.63978
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJBB Vol.59(9) [SEP 2022]