https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50270 Wed 12 Jul 2023 13:01:17 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39615 90% removal of perfluorooctanesulfonate (PFOS) and perfluorooctanoic acid (PFOA) from biosolids derived biochar could be achieved in the pyrolysis-combustion integrated process. The biosolids derived biochar demonstrated >80% adsorption of long-chain PFASs and 19-27% adsorption of short-chain PFASs from PFAS contaminated water.]]> Wed 10 Aug 2022 11:48:20 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39613 Wed 10 Aug 2022 11:41:40 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50950 Wed 07 Feb 2024 14:26:18 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54618 Wed 06 Mar 2024 10:46:13 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54422 Tue 27 Feb 2024 13:57:48 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54420 Tue 27 Feb 2024 13:52:27 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:54913 Thu 21 Mar 2024 12:20:42 AEDT ]]> https://ogma.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://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44451 Thu 13 Oct 2022 15:01:54 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42485 p = .006), whereas no significant differences were found between the means of the two groups using the standard L/N ratio (p = .063). The modified L/N ratios also showed a statistically significant difference between the means of the bores impacted by municipal waste versus those impacted by non-putrescible waste (p = .003), indicating they are a much more sensitive indicator of both the existence and type of landfill leachate impact on groundwater than previously reported. This new index may prove particularly useful in complex urban areas where multiple potential contamination sources exist, and land use histories are either unknown or complicated. Capsule: Conventional methods for leachate detection in groundwater surrounding legacy landfills have been analysed and further developed via the inclusion of perfluoroalkyl acids, to better understand contaminant sources, fate and transport.]]> Thu 08 Feb 2024 10:42:49 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42691 Cannabis sativa L.) were found to be far superior for PFAS removal than the next best protein, soy. The use of hemp plant proteins as a possible pump-and-treat solution to PFAS remediation from groundwater has been successfully demonstrated with very good removals (>98%) of the main contaminants of PFOS and PFHxS in approximately 1 h of contact time, with salinity enhancing removal of short chain PFAS. Changes to the secondary structure of hemp proteins was found using FTIR spectroscopy analysis and calculated based on the integrated areas of the amide I component bands. The amount of β-turns increased from ∼9.3% (control) to 44.1% (undiluted groundwater); with a decrease in random coils (25.6–8.6%); α-helix (19.3–8.6%) and β-sheets (38.8–23.1%). These changes indicate that hemp proteins partially unfold during the reaction with PFAS with other FTIR evidence suggesting sorption at hydrophobic sites of the protein as well as with the side chains of the amino acids aspartic and glutamic acid. The absence of these side chains in soy protein, as evidenced from FTIR and amino acid analysis, being part of the reason why soy removed less (approx. half) of the Σ(PFHxS + PFOS) load when compared to hemp. The findings reported here will lead to new, environmentally friendly methods for PFAS remediation.]]> Thu 01 Sep 2022 09:43:23 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:55455 Mon 03 Jun 2024 08:45:49 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45427 Fri 28 Oct 2022 11:48:22 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52662 Fri 20 Oct 2023 09:09:08 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47455 Fri 20 Jan 2023 17:38:34 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40593 Fri 15 Jul 2022 11:07:13 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46143 Fri 11 Nov 2022 17:35:07 AEDT ]]>