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AuthorNouri, Alireza
AuthorAng, Wei Lun
AuthorMahmoudi, Ebrahim
AuthorChua, Siew Fen
AuthorMohammad, Abdul Wahab
AuthorBenamor, Abdelbaki
AuthorBa-Abbad, Muneer M.
AuthorLeo, Choe Peng
Available date2023-08-23T08:43:43Z
Publication Date2023-05-01
Publication NameChemosphere
Identifierhttp://dx.doi.org/10.1016/j.chemosphere.2023.138219
CitationNouri, A., Ang, W. L., Mahmoudi, E., Chua, S. F., Mohammad, A. W., Benamor, A., ... & Leo, C. P. (2023). Decoration of polylactic acid on graphene oxide for efficient adsorption of methylene blue and tetracycline. Chemosphere, 322, 138219.‏
ISSN00456535
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85148770395&origin=inward
URIhttp://hdl.handle.net/10576/46741
AbstractDecorating nanomaterials on graphene oxide (GO) can enhance its adsorption capacity and removal efficiency of water pollutants. In this study, for the first time, nano-sized polylactic acid (PLA) has been successfully decorated on the surface of GO through a facile synthesis approach. The adsorptive efficiency of GO-PLA for removing methylene blue (MB) and tetracycline (TC) from an aqueous solution was examined. The characterization confirmed the successful decoration of PLA on GO nanosheets with the nano size of PLA. It was hypothesized that the PLA was decorated on the surface of GO through covalent bonding between oxygen-containing functional groups and lactide molecules. The optimum adsorption parameters determined were at the adsorbent dose of 0.5 g L−1, pH 4, contact time of 120 min, and temperature of 318 K. The pseudo-second-order kinetic model described the contaminants' adsorption behaviour, and the intraparticle diffusion model revealed that both surface adsorption and intraparticle diffusion controlled the adsorption process. Langmuir isotherm model best described the adsorption behaviour of the pollutants on GO-PLA and demonstrated the maximum monolayer uptake capacities of MB (332.5 mg g−1) and TC (223.7 mg g−1). The adsorption results indicated that the uptake capacities of GO-PLA in comparison to GO have increased by approximately 70% and 110% for MB and TC, respectively. These observations reflect the remarkable role of nano-sized PLA that enhanced the adsorption capacity due to its additional functional group and larger surface area.
SponsorThe authors would like to thank the Qatar National Research Fund for funding this work through NPRP Grant # 10-0127-170270 (acknowledged under the grant code KK-2018-008 ).
Languageen
PublisherElsevier Ltd
SubjectAdsorption
Cationic dye
Graphene oxide
Nanoparticles
Pharmaceutical wastewater
Polylactic acid
TitleDecoration of polylactic acid on graphene oxide for efficient adsorption of methylene blue and tetracycline
TypeArticle
Volume Number322
dc.accessType Abstract Only


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