Ameh, AEMusyoka, Nicholas MFatoba, OOSyrtsova, DATeplyakov, VVPetrik, LF2017-02-232017-02-232016-01Ameh, A.E., Musyoka, N.M., Fatoba, O.O., Syrtsova, D.A., Teplyakov, V.V. and Petrik, L.F. 2016. Synthesis of zeolite NaA membrane from fused fly ash extract. Journal of Environmental Science and Health, Part A, 51(4), pp 348-3561093-4529https://www.ncbi.nlm.nih.gov/pubmed/26761276http://hdl.handle.net/10204/8971Copyright: 2016 Taylor & Francis. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in Journal of Environmental Science and Health, Part A, 51(4),pp 348-356Zeolite-NaA membranes were synthesized from an extract of fused South African fly ash on a porous titanium support by a secondary growth method. The influence of the synthesis molar regime on the formation of zeolite NaA membrane layer was investigated. Two synthesis mixtures were generated by adding either aluminium hydroxide or sodium aluminate to the fused fly ash extract. The feedstock material and the synthesized membranes were characterized by X-diffraction (XRD), scanning electron microscopy (SEM) and X-ray fluorescence spectroscopy (XRF). It was found by XRD and SEM that the cubic crystals of a typical zeolite NaA with a dense intergrown layer was formed on the porous Ti support. The study shows that the source of Al used had an effect on the membrane integrity as sodium aluminate provided the appropriate amount of Na(sup+) to form a coherent membrane of zeolite NaA, whereas aluminium hydroxide did not. Morphological, the single hydrothermal stage seeded support formed an interlocked array of zeolite NaA particles with neighbouring crystals. Also, a robust, continuous and wellintergrown zeolite NaA membrane was formed with neighbouring crystals of zeolite fused to each other after the multiple stage synthesis. The synthesized membrane was permeable to He (6.0 x 10(sup6) L (m (sup-2)h(sup-1) atm(sup-1) and CO(sub2) (5.6 x 10(sup6) L m (sup-2)h(sup-1) atm(sup-1), which indicate that the layer of the membrane was firmly attached to the porous Ti support. Membrane selectivity was maintained showing membrane integrity with permselectivity of 1.1, showing that a waste feedstock, fly ash, could be utilized for preparing robust zeolite NaA membranes on Ti support.enCrystalFly ashFused fly ash extractHydrothermalMultiple stagesPermeancePorousSingle stageTitanium supportsZeolite NaA membraneArticleAmeh, A., Musyoka, N. M., Fatoba, O., Syrtsova, D., Teplyakov, V., & Petrik, L. (2016). Synthesis of zeolite NaA membrane from fused fly ash extract. http://hdl.handle.net/10204/8971Ameh, AE, Nicholas M Musyoka, OO Fatoba, DA Syrtsova, VV Teplyakov, and LF Petrik "Synthesis of zeolite NaA membrane from fused fly ash extract." (2016) http://hdl.handle.net/10204/8971Ameh A, Musyoka NM, Fatoba O, Syrtsova D, Teplyakov V, Petrik L. Synthesis of zeolite NaA membrane from fused fly ash extract. 2016; http://hdl.handle.net/10204/8971.TY - Article AU - Ameh, AE AU - Musyoka, Nicholas M AU - Fatoba, OO AU - Syrtsova, DA AU - Teplyakov, VV AU - Petrik, LF AB - Zeolite-NaA membranes were synthesized from an extract of fused South African fly ash on a porous titanium support by a secondary growth method. The influence of the synthesis molar regime on the formation of zeolite NaA membrane layer was investigated. Two synthesis mixtures were generated by adding either aluminium hydroxide or sodium aluminate to the fused fly ash extract. The feedstock material and the synthesized membranes were characterized by X-diffraction (XRD), scanning electron microscopy (SEM) and X-ray fluorescence spectroscopy (XRF). It was found by XRD and SEM that the cubic crystals of a typical zeolite NaA with a dense intergrown layer was formed on the porous Ti support. The study shows that the source of Al used had an effect on the membrane integrity as sodium aluminate provided the appropriate amount of Na(sup+) to form a coherent membrane of zeolite NaA, whereas aluminium hydroxide did not. Morphological, the single hydrothermal stage seeded support formed an interlocked array of zeolite NaA particles with neighbouring crystals. Also, a robust, continuous and wellintergrown zeolite NaA membrane was formed with neighbouring crystals of zeolite fused to each other after the multiple stage synthesis. The synthesized membrane was permeable to He (6.0 x 10(sup6) L (m (sup-2)h(sup-1) atm(sup-1) and CO(sub2) (5.6 x 10(sup6) L m (sup-2)h(sup-1) atm(sup-1), which indicate that the layer of the membrane was firmly attached to the porous Ti support. Membrane selectivity was maintained showing membrane integrity with permselectivity of 1.1, showing that a waste feedstock, fly ash, could be utilized for preparing robust zeolite NaA membranes on Ti support. DA - 2016-01 DB - ResearchSpace DP - CSIR KW - Crystal KW - Fly ash KW - Fused fly ash extract KW - Hydrothermal KW - Multiple stages KW - Permeance KW - Porous KW - Single stage KW - Titanium supports KW - Zeolite NaA membrane LK - https://researchspace.csir.co.za PY - 2016 SM - 1093-4529 T1 - Synthesis of zeolite NaA membrane from fused fly ash extract TI - Synthesis of zeolite NaA membrane from fused fly ash extract UR - http://hdl.handle.net/10204/8971 ER -