https://commons.ru.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://commons.ru.ac.za/vital/access/manager/Repository/vital:51431 99%) were obtained in under 240 min with turn-over frequencies ranging from 21.89 to 265.53 h−1, depending on the quantity of catalyst and temperature. The microspherical catalysts also proved to be recyclable with no drop in activity being observed after three successive reactions. The vanadium functionalized fibers were applied in a pseudo continuous flow set-up. Factors influencing the overall conversion and product selectivity, including flow rate and catalyst quantity, were investigated. At flow rates of 1–4 mL h−1 near quantitative conversion was maintained over an extended period. Keeping the mass of catalyst constant (0.025 g) and varying the flow rate from 1–6 mL h−1 resulted in a shift in the formation of the oxidation product methyl phenyl sulfone from 60.1 to 18.6%.]]> Wed 10 Apr 2024 14:17:42 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:7324 Wed 08 May 2024 17:38:35 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:51429 Wed 08 May 2024 16:15:32 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:50957 Wed 08 May 2024 16:13:58 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:50969 Wed 08 May 2024 16:13:33 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:7270 0.99. The S-TETA sorbent material was palladium(II) specific. Pd(II) loaded on the silica column was recovered using 3% m/v thiourea solution as the eluting agent. Separation of platinum and palladium was achieved by selective stripping of [PtCl6]2− with 0.5 M of NaClO4 in 1.0 M HCl while Pd(II) was eluted with 0.5 M thiourea in 1.0 M HCl. The separation of palladium (Pd) from a mixture containing platinum (Pt), iridium (Ir), and rhodium (Rh) was successful on silica functionalized with triethylenetriamine (TETA) showing specificity for palladium(II) and a loading capacity of 0.27 mg/g. S-TETA showed potential for use in the recovery of palladium from platinum group metals such as from solutions of worn out automobile emission control catalytic convertors and other secondary sources.]]> Wed 08 May 2024 16:00:16 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:74773 Wed 07 Aug 2024 16:02:21 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:51428 Wed 07 Aug 2024 16:02:20 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:35413 Wed 07 Aug 2024 16:02:18 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:6566 Wed 07 Aug 2024 16:02:17 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:7330 Wed 07 Aug 2024 16:02:17 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:51257 Wed 07 Aug 2024 16:02:17 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:74686 Wed 07 Aug 2024 15:55:23 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:74685 Wed 07 Aug 2024 15:55:22 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:50959 Wed 07 Aug 2024 15:55:19 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:51000 Wed 05 Apr 2023 08:51:07 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:50961 0.99. The highest loading capacity of Pt and Pd were 7.4 mg/g and 4.3 mg/g respectively for the nanofiber sorbent material based on ethylenediamine (EDA) while the beads with ethylenediamine (EDA) gave 1.0 mg/g and 0.2 mg/g for Pt and Pd respectively. Metals loaded on the sorbent materials were recovered by using 3% m/v thiourea solution as the eluting agent with quantitative desorption efficiency under the selected experimental conditions. Separation of platinum from palladium was partially achieved by selective stripping of PtCl62- with 0.5 M of NaClO4 in 1.0 M HCl while PdCl42- was eluted with 0.5 M thiourea in 1.0 M HCl. Separation of platinum from iridium and rhodium under 1 M HCl concentration was successful on triethylenetriamine (TETA)-functionalized Merrifield beads. This material (M-TETA) showed selectivity for platinum albeit the low loading capacity.]]> Wed 05 Apr 2023 08:50:56 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:50903 0.99. The S-TETA sorbent material was palladium(II) specific. Pd(II) loaded on the silica column was recovered using 3% m/v thiourea solution as the eluting agent. Separation of platinum and palladium was achieved by selective stripping of [PtCl6]2− with 0.5 M of NaClO4 in 1.0 M HCl while Pd(II) was eluted with 0.5 M thiourea in 1.0 M HCl. The separation of palladium (Pd) from a mixture containing platinum (Pt), iridium (Ir), and rhodium (Rh) was successful on silica functionalized with triethylenetriamine (TETA) showing specificity for palladium(II) and a loading capacity of 0.27 mg/g. S-TETA showed potential for use in the recovery of palladium from platinum group metals such as from solutions of worn out automobile emission control catalytic convertors and other secondary sources.]]> Wed 05 Apr 2023 08:50:30 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:7269 0.99. The S-TETA sorbent material was palladium(II) specific. Pd(II) loaded on the silica column was recovered using 3% m/v thiourea solution as the eluting agent. Separation of platinum and palladium was achieved by selective stripping of [PtCl6]2− with 0.5 M of NaClO4 in 1.0 M HCl while Pd(II) was eluted with 0.5 M thiourea in 1.0 M HCl. The separation of palladium (Pd) from a mixture containing platinum (Pt), iridium (Ir), and rhodium (Rh) was successful on silica functionalized with triethylenetriamine (TETA) showing specificity for palladium(II) and a loading capacity of 0.27 mg/g. S-TETA showed potential for use in the recovery of palladium from platinum group metals such as from solutions of worn out automobile emission control catalytic convertors and other secondary sources.]]> Wed 05 Apr 2023 08:50:27 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:44165 2500 µg mL–1) bacteria and all the compounds were inactive against the yeast (Candida albicans).]]> Tue 14 May 2024 11:56:44 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:57910 Tue 07 May 2024 11:42:14 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:75230 Thu 29 Aug 2024 08:41:07 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:6590 Thu 24 Oct 2024 14:58:50 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:75028 Thu 15 Aug 2024 14:31:27 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:75026 Thu 15 Aug 2024 14:31:25 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:41007 Mon 26 Aug 2024 09:30:18 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:74814 Mon 11 Nov 2024 09:08:58 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:74575 Fri 02 Aug 2024 16:30:15 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:74578 Fri 02 Aug 2024 16:30:14 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:74576 Fri 02 Aug 2024 16:30:11 SAST ]]> https://commons.ru.ac.za/vital/access/manager/Repository/vital:74592 Fri 02 Aug 2024 16:30:11 SAST ]]>