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Insights into the single and binary adsorption of copper(II) and nickel(II) on hexagonal boron nitride: performance and mechanistic studies

Oh Wen Da, Lee Martin G.H., Chanaka Udayanga, W. D., Veksha Andrei, Bao Yueping, Giannis Apostolos, Lim Jun-Wei, Lisak Grzegorz

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URIhttp://purl.tuc.gr/dl/dias/F42A6297-3702-4962-8647-E940BCC5A51C-
Identifierhttps://doi.org/10.1016/j.jece.2018.102872-
Identifierhttps://www.sciencedirect.com/science/article/pii/S2213343718307954-
Languageen-
Extent8 pagesen
TitleInsights into the single and binary adsorption of copper(II) and nickel(II) on hexagonal boron nitride: performance and mechanistic studiesen
CreatorOh Wen Daen
CreatorLee Martin G.H.en
CreatorChanaka Udayanga, W. D.en
CreatorVeksha Andreien
CreatorBao Yuepingen
CreatorGiannis Apostolosen
CreatorΓιαννης Αποστολοςel
CreatorLim Jun-Weien
CreatorLisak Grzegorzen
PublisherElsevieren
Content SummaryA series of hexagonal boron nitrides (h-BNs) was developed using a facile method involving pyrolysis of urea and boric acid mixture at different temperatures. The as-prepared h-BNs were characterized using XRD, FESEM, FTIR, BET and XPS and the results indicated that the as-prepared h-BNs consist of microparticle structures with BET specific surface area between 12-18 m 2 g -1 . The h-BN prepared at 750°C (BN-750) displayed excellent adsorption capacities for both Cu(II) and Ni(II) (up to 200 and 95 mg g -1 , respectively) compared to those prepared at other temperatures. At higher metal ion concentrations (>250 mg L -1 ), multilayer adsorption was observed. The equilibrium adsorption modelling study indicated that the adsorption process was best fitted to the Langmuir (R 2 >0.97) and Sips (R 2 >0.98) isotherm models. The binary adsorption of Cu(II) and Ni(II) was also investigated and the results revealed that the BN-750 has higher adsorption affinity for Cu(II) compared to Ni(II). Detailed analyses of the spent adsorbent using XPS and FTIR indicated that the oxygen functional groups of BN-750 played an important role in facilitating the electrostatic attraction and complexation of heavy metal during adsorption process. Furthermore, the results confirmed that Cu(II) and Ni(II) occupied the same active sites on BN-750. The results of this study revealed insights into the adsorption mechanism of Cu(II) and Ni(II) on BN-750 and demonstrated that the as-prepared h-BN is a promising adsorbent for efficient heavy metal removal in aqueous system.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2020-09-29-
Date of Publication2019-
SubjectAdsorptionen
SubjectBoron nitrideen
SubjectCopper(II)en
SubjectMechanismen
SubjectNickel(II)en
SubjectOxygen functional groupsen
Bibliographic CitationW.-D. Oh, M.G.-H. Lee, W.D. Chanaka Udayanga, A. Veksha, Y. Bao, A. Giannis, J.-W. Lim and G. Lisak, "Insights into the single and binary adsorption of copper(II) and nickel(II) on hexagonal boron nitride: performance and mechanistic studies," J. Environ. Chem. Eng., vol. 7, no. 1, Feb. 2019. doi: 10.1016/j.jece.2018.102872en

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