https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:53848 Wed 28 Feb 2024 16:26:29 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50611 Wed 28 Feb 2024 15:34:43 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54044 Tue 30 Jan 2024 13:50:18 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54541 Tue 27 Feb 2024 20:41:02 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54422 Tue 27 Feb 2024 13:57:48 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:44336 Tue 11 Oct 2022 19:21:36 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:42070 2) from a lead-acid battery to break down PFAS including perfluorooctanoic acid (PFOA), perfluorooctane sulfonate (PFOS), and 1H,1H,2H,2H-perfluorooctanesulfonic acid (6:2 FTS). By optimising the PbO₂ panel (activating and doping) and working conditions including supporting electrolyte (1 L 10 mM Na₂SO₄), initial concentration (10 μM), temperature (room temperature), current density (5 A for a 10 cm x 10 cm PbO₂ panel) etc., we successfully remove > 99% PFAS (individual PFAS monitored via HPLC-MS) whilst mineralising ∼59% PFOA (defluorination, F− released and monitored via F-ISE, fluoride-ion selective electrode). By studying the pseudo-first-order kinetics of the PFAS breakdown (0.0028–0.007 min−1) and defluorination (0.84–5.9 x 10⁻⁸ min⁻¹), we assign the difference to the adsorption of PFAS on the PbO₂ panel and the appearance of intermediates before the full defluorination. The leaked HF gas (∼10−5 M, collected using 0.25 L 0.1 M NaOH) and Pb²⁺ (∼12 μM, or ∼ 2.5 ppm) are also confirmed. This study employs an economic industrial material, highlights the contribution of adsorption towards the PFAS removal and breakdown, and identifies the possible leakage of secondary contaminants.]]> Thu 18 Aug 2022 09:20:17 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46088 2–Sb/Ce–PbO₂ anode and US (20 kHz and 52 W). The influences of PFOA initial concentrations on its degradation were studied in EC and US-EC systems, while the effects of applied current densities were investigated in US-EC system. With the assistance of US, the increases of pseudo-first-order kinetic rate constant from 0.017 to 0.031 min⁻¹, defluorination efficiency from 75.9% to 87.9%, mineralization efficiency from 71.9% to 86.1% and mineralization current efficiency from 0.66% to 0.77% were obtained at current density of 15 mA cm⁻² and PFOA initial concentration of 60 mg L⁻¹ during the reaction time of 180 min. The production and quenching of •OH were tested to emphasize the function of US in electrochemical mineralization of PFOA. In US-EC system, the electrochemical degradation performance of PFOA was enhanced not because of cavitation under US, but possibly because of the collapse of bubbles, anode surface cleaning, fast electron transfer on anode and higher •OH production under the assistance of US.]]> Fri 11 Nov 2022 09:24:07 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:55588 Fri 07 Jun 2024 12:01:31 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:55055 Fri 05 Apr 2024 13:53:30 AEDT ]]>