Removal of aluminium from aqueous solutions using PAN-based adsorbents: characterisation, kinetics, equilibrium and thermodynamic studies

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dc.contributor.authorAly, Zen_AU
dc.contributor.authorGraulet, Aen_AU
dc.contributor.authorScales, Nen_AU
dc.contributor.authorHanley, TLen_AU
dc.date.accessioned2015-12-28T00:13:41Zen_AU
dc.date.available2015-12-28T00:13:41Zen_AU
dc.date.issued2014-12-04en_AU
dc.date.statistics2015-12-19en_AU
dc.description.abstractEconomic adsorbents in bead form were fabricated and utilised for the adsorption of Al(3+) from aqueous solutions. Polyacrylonitrile (PAN) beads, PAN powder and the thermally treated PAN beads (250 °C/48 h/Ar and 600 °C/48 h/Ar-H2) were characterised using different techniques including Fourier transform infrared spectroscopy, X-ray diffraction, specific surface analysis (Brunauer-Emmett-Teller), thermogravimetric analysis as well as scanning electron microscopy. Effects of pH, contact time, kinetics and adsorption isotherms at different temperatures were investigated in batch mode experiments. Aluminium kinetic data best fit the Lagergren pseudo-second-order adsorption model indicating a one-step, surface-only, adsorption process with chemisorption being the rate limiting step. Equilibrium adsorption data followed a Langmuir adsorption model with fairly low monolayer adsorption capacities suitable for freshwater clean-up only. Various constants including thermodynamic constants were evaluated from the experimental results obtained at 20, 40 and 60 °C. Positive values of ΔH° indicated that the adsorption of Al(3+) onto all three adsorbents was endothermic with less energy input required for PAN powder compared to PAN beads and low-temperature thermally treated PAN. Negative ΔG° values indicated that the aluminium adsorption process was spontaneous for all adsorbents examined. © 2020 Springer Natureen_AU
dc.identifier.citationAly, Z., Graulet, A., Scales, N. & Hanley, T. (2014). Removal of aluminium from aqueous solutions using PAN-based adsorbents: characterisation, kinetics, equilibrium and thermodynamic studies. Environmental Science and Pollution Research, 21(5), 3972-3986. doi: 10.1007/s11356-013-2305-6en_AU
dc.identifier.govdoc6346en_AU
dc.identifier.issn2071-1050en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleEnvironmental Science and Pollution Researchen_AU
dc.identifier.pagination3972-3986en_AU
dc.identifier.urihttps://doi.org/10.1007/s11356-013-2305-6en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6479en_AU
dc.identifier.volume21en_AU
dc.language.isoenen_AU
dc.publisherSpringeren_AU
dc.subjectOrganic polymersen_AU
dc.subjectAdsorption isothermsen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectKineticsen_AU
dc.subjectAluminiumen_AU
dc.subjectThermal gravimetric analysisen_AU
dc.titleRemoval of aluminium from aqueous solutions using PAN-based adsorbents: characterisation, kinetics, equilibrium and thermodynamic studiesen_AU
dc.typeJournal Articleen_AU
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