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Article

Adsorptive Removal of Methylene Blue from Aquatic Environments Using Thiourea-Modified Poly(Acrylonitrile-co-Acrylic Acid)

1
Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, UPM Serdang 43400, Malaysia
2
Department of Chemical and Petroleum Engineering, College of Engineering, Afe Babalola University Ado-Ekiti, ABUAD, KM. 8.5, Afe Babalola Way, P.M.B. 5454, Ado-Ekiti, Ekiti State, Nigeria
3
Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, UPM Serdang 43400, Malaysia
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Centre of Foundation Studies for Agricultural Science, Universiti Putra Malaysia, UPM Serdang 43400, Malaysia
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Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, UPM Serdang 43400, Malaysia
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Faculty of Chemical Engineering, Universiti Teknologi Mara, Masai 81750, Johor darul Takzim, Malaysia
*
Author to whom correspondence should be addressed.
Materials 2019, 12(11), 1734; https://doi.org/10.3390/ma12111734
Received: 10 March 2019 / Revised: 19 April 2019 / Accepted: 20 April 2019 / Published: 28 May 2019
(This article belongs to the Special Issue Synthesis, Characterization and Applications of Block Copolymers)
The paper evaluates the adsorptive potential of thiourea-modified poly(acrylonitrile-co-acrylic acid), (TA-poly(AN-co-AA)) for the uptake of cationic methylene blue (MB) from aquatic environments via a batch system. TA-poly(AN-co-AA) polymer was synthesized through redox polymerization and modified with thiourea (TA) where thioamide groups were introduced to the surface. Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), CHNS and Zetasizer were used to characterize the physico-chemical and morphological properties of prepared TA-poly(AN-co-AA). Afterwards, it was confirmed that incorporation of thioamide groups was successful. The adsorption kinetics and equilibrium adsorption data were best described, respectively, by a pseudo-second-order model and Freundlich model. Thermodynamic analysis showed the exothermic and spontaneous nature of MB uptake by TA-poly(AN-co-AA). The developed TA-poly(AN-co-AA) polymer demonstrated efficient separation of MB dye from the aqueous solution and maintained maximum adsorption capacity after five regeneration cycles. The findings of this study suggested that synthesized TA-poly(AN-co-AA) can be applied successfully to remove cationic dyes from aquatic environments. View Full-Text
Keywords: adsorption; kinetics; redox polymerization; thioamide groups; regeneration adsorption; kinetics; redox polymerization; thioamide groups; regeneration
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MDPI and ACS Style

Adeyi, A.A.; Jamil, S.N.A.M.; Abdullah, L.C.; Choong, T.S.Y.; Lau, K.L.; Abdullah, M. Adsorptive Removal of Methylene Blue from Aquatic Environments Using Thiourea-Modified Poly(Acrylonitrile-co-Acrylic Acid). Materials 2019, 12, 1734. https://doi.org/10.3390/ma12111734

AMA Style

Adeyi AA, Jamil SNAM, Abdullah LC, Choong TSY, Lau KL, Abdullah M. Adsorptive Removal of Methylene Blue from Aquatic Environments Using Thiourea-Modified Poly(Acrylonitrile-co-Acrylic Acid). Materials. 2019; 12(11):1734. https://doi.org/10.3390/ma12111734

Chicago/Turabian Style

Adeyi, Abel A., Siti N.A.M. Jamil, Luqman C. Abdullah, Thomas S.Y. Choong, Kia L. Lau, and Mohammad Abdullah. 2019. "Adsorptive Removal of Methylene Blue from Aquatic Environments Using Thiourea-Modified Poly(Acrylonitrile-co-Acrylic Acid)" Materials 12, no. 11: 1734. https://doi.org/10.3390/ma12111734

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