Modelling of basic blue-9 dye sorption onto hydrolyzed polyacrylonitrile grafted starch composite
Chukwunonso O. Aniagor,M. A. Afifi,A. Hashem +2 more
- 25 Dec 2021
- Vol. 2, pp 100141
21
TL;DR: In this paper, a superabsorbent hydrogel (HS) was synthesized through the polyacrylonitrile graft copolymerization and subsequent hydrolysis of corn starch.
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Abstract: This study reports the synthesis of a superabsorbent hydrogel (HS) through the polyacrylonitrile (PAN) graft copolymerization and subsequent hydrolysis of corn starch. The surface morphology and chemistry, as well as the physicochemical characteristics of the hydrogel, were elucidated. The effectiveness of the synthesized hydrogel sorbent for remediating a basic blue-9 dye contaminated stream was subsequently investigated. Also, the relationship between the different process variables and the hydrogels’ remediation (sorption) capacity was studied, while the generated experimental kinetic and equilibrium data were effectively modelled using relevant isotherm and kinetic models. The Langmuir isotherm and pseudo-first-order kinetic models fitted best to the equilibrium and kinetic data, respectively. By applying specified mechanistic models, the intraparticle diffusion mechanism was identified as the sole rate-limiting step of the sorption process. The hydrogel showed excellent water absorption and monolayer sorption capacities of 710 ± 1.6 g water/g and 343.27 ± 1.3 mg/g, respectively. Thus, the hydrogel shows potential for the decontamination of dyestuff polluted streams.
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Citations
Removal of pollutants from aqueous media using cow dung-based adsorbents
Kingsley O. Iwuozor,Ebuka Chizitere Emenike,Chukwunonso O. Aniagor,Felicitas U. Iwuchukwu,Enoch Mayowa Ibitogbe,Okikiola Boluwape Temitayo,P. E. Omuku,Adewale George Adeniyi +7 more
TL;DR: In this paper , the authors report the efficiency of utilized cow-dung-based adsorbents for the sequestration of a wide spectrum of pollutants from aqueous media and discuss the potential of utilizing cow dung as a cheap and effective adsorbent.
54
Recent developments in the utilization of modified graphene oxide to adsorb dyes from water: A review
Tianqi Liu,Chukwunonso O. Aniagor,M.I. Ejimofor,Matthew Chukwudi Menkiti,Yakubu Mammam Wakawa,Jie Li,Rachid Ait Akbour,Pow-Seng Yap,Sie Yon Lau,Jaison Jeevanandam +9 more
TL;DR: In this article , the authors present the classifications and hazards of dyes, types of preparation methods for modified graphene oxide and recent developments in the employment of modified GNO to adsorb dyes from water.
45
Purchased by U. S. Dept. of Agric. for Official Use. Dispersions or Solutions? A Mechanism for Certain Thickening Agents*
E. B. Bagley
- 01 Jan 1974
TL;DR: In this article, it was shown that high viscosity H-SPAN water mixtures consist of swollen, deformable gel particles closely packed in intimate contact, and that at high dilution or at high ionic strength conditions, the gel particles no longer are tightly packed, solvent is present in excess, the viscoity drops precipitously, and the thickening action effectively disappears.
40
Recent Developments in the Removal of Dyes from Water by Starch‐Based Adsorbents
TL;DR: Starch-based adsorbents have demonstrated excellent potential for the removal of various noxious dyes from wastewater as mentioned in this paper , with emphasis on the effect of key parameters, adsorption mechanism and their reusability potential.
37
Mechanistic investigation of the mass transfer stages involved during the adsorption of aqueous lead onto Scopulariopsis brevicompactum fungal biomass
Latifa A. Mohamed,Chukwunonso O. Aniagor,Ghada M. Taha,A. Abou-Okeil,A. Hashem +4 more
- 01 Dec 2021
TL;DR: In this paper, Scopulariopsis brevicompactum fungal biomass (SFB) was applied as an adsorbent for the uptake of aqueous lead species via the dynamic sorption process.
25
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