Amidoxime modification of polyacrylonitrile/Pterocladia capillacea-derived activated carbon composite for adsorption of toxic chromium from aquatic environment

By polymerizing acrylonitrile in the presence of ammonium persulfate as an initiator and Pterocladia capillacea-activated carbon (P-AC) as a filler, a composite material polyacrylonitrile/Pterocladia capillacea-activated carbon (PAN/P- AC) was developed. By reacting hydroxylamine with the composite&...

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Bibliographic Details
Published in:Carbon Letters 2022-03, Vol.32 (2), p.513-535
Main Authors: Shoaib, Amany G. M., El Nemr, Ahmed, El Sikaily, Amany, Masoud, Mamdouh S., Ramadan, Mohamed S.
Format: Article
Language:English
Subjects:
Acrylonitrile
Activated carbon
Adsorbents
Adsorption
Ammonium
Ammonium peroxodisulfate
Aquatic environment
Biomedical materials
Carbon
Chemicals
Chromium
Composite materials
Drinking water
Heavy metals
Isotherms
Polyacrylonitrile
Polymerization
Polymers
Pterocladia capillacea
Scanning electron microscopy
Sorbents
Spectrometry
Thermodynamics
Thermogravimetric analysis
X-ray spectroscopy
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Summary:By polymerizing acrylonitrile in the presence of ammonium persulfate as an initiator and Pterocladia capillacea-activated carbon (P-AC) as a filler, a composite material polyacrylonitrile/Pterocladia capillacea-activated carbon (PAN/P- AC) was developed. By reacting hydroxylamine with the composite's nitrile groups, the prepared composite was functionalized by amidoximation. FTIR spectrometry, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and Brunauer–Emmett–Teller (BET) analysis were all applied to thoroughly characterize the fabricated adsorbent. For the treatment of Cr(VI) ions from synthetic solutions, the adsorption properties of amidoximated polyacrylonitrile/Pterocladia capillacea-activated carbon (PAO/P-AC) were investigated. The pH effect, uptake kinetics, adsorption isotherms, and thermodynamics studies were used to characterize adsorption properties. As a kinetic model analysis, the data confirmed that the pseudo-second-order rate equation matched well the adsorption process. With coefficients of determination (R2) of 0.9998, the Tempkin isotherm model had the lowest error, suggesting that it is the best fitted model to describe this adsorption mechanism. Thermodynamic parameters demonstrated that Cr(VI) adsorption was endothermic.
ISSN:1976-4251
2233-4998
DOI:10.1007/s42823-021-00281-y