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Fabrication of novel magnetic graphene oxide nanoadsorbent from Strychnous potatorum seeds for enhanced removal of chromium from wastewater

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Title Fabrication of novel magnetic graphene oxide nanoadsorbent from Strychnous potatorum seeds for enhanced removal of chromium from wastewater
 
Creator Janani, R.
Sivakumar, K.
Baskar, G.
 
Subject Adsorption kinetics
Graphene oxide
Green synthesis
Magnetic nanoadsorbent
 
Description 70-84
The main aim of the study is to synthesize graphene oxide from natural source (by utilizing Strychnous potatorum seeds)
and composite with iron oxide to form magnetic graphene oxide (MGO) which has been applied as adsorbent for removal of
chromium from wastewater. The prepared MGO adsorbent has been characterized by FTIR, XRD, VSM, UV-visible and
SEM to examine its structural, morphology, elemental and chemical composition. The average particle size of MGO from
SEM image is 47.2 nm and analysis results show the successful oxidation of GO and well distribution of magnetic iron
oxide particles onto GO. Batch method has been opted for adsorption process and the operation parameters are optimized.
The adsorbent MGO exhibits maximum removal rate of 97.1% for chromium under optimized conditions. An adsorbent
dose of 10 mg shows maximum efficiency in the adsorption process. Adsorption Isotherm and kinetic behaviour are
investigated and founded that Freundlich adsorption isotherm model are well suited for chromium (R2=0.996) and the
adsorption behaviour are well explained by pseudo second order which followed by chemisorption. The maximum
adsorption capacity (qmax) exhibited by this novel MGO adsorbent is 9.09 mg/g. Desorbing agent NaOH is used for
desorption process. Only 17.1% efficiency is reduced even after 5 cycles of adsorption-desorption and proved can be reuse.
This novel MGO adsorbent is easily separated after the adsorption process. From the study, it is concluded that this neoteric
MGO adsorbent as a promising, super-eminent candidate for wastewater treatment.
 
Date 2024-01-12T12:32:15Z
2024-01-12T12:32:15Z
2024-01
 
Type Article
 
Identifier 0975-0991 (Online); 0971-457X (Print)
http://nopr.niscpr.res.in/handle/123456789/63203
https://doi.org/10.56042/ijct.v31i1.1719
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJCT Vol.31(1) [January 2024]