https://nova.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52444 Wed 11 Oct 2023 14:54:12 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52163 Wed 04 Oct 2023 10:49:42 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34312 Tue 26 Feb 2019 16:56:27 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50419 CTAB > SDS, which is opposed to their CMC (Triton X-100: 0.28 mM＜CTAB: 1.07 mM＜SDS: 7.69 mM). Rising the surfactant concentration would not enhance the defluorination, the best one was obtained at its CMC. Moreover, changing the pH of the US bath liquid by adding acid or alkaline solution inhibited the defluorination, which might be attributed to acid or base causing damage to the chemical properties or physical structure of surfactant (certified by the SEM tests). Additionally, the mechanism of enhanced PFOA defluorination was examined by electron paramagnetic resonance analysis, which proved that adding surfactant facilitated the generation of the radicals (·OH and SO4∙-), as well as the radicals’ amount increased over time during 60 min. Finally, the inhibited defluorination of adding surfactant directly to the PFOA solution was studied by the SEM analysis, the results demonstrated that adsorption and wrapping between surfactant micelles and PFOA reduced the contact between PFOA and radicals and affected the surfactant effect on the surface tension.]]> Tue 25 Jul 2023 18:05:23 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:49593 Tue 23 May 2023 12:03:09 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:54353 Tue 20 Feb 2024 16:19:23 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:52767 Tue 14 Nov 2023 15:12:48 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:51634 Tue 12 Sep 2023 20:16:27 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:39498 3 MPN/mL) on the membrane, facilitating biogenetic manganese formation. The dominant MnOB (i.e., Hyphomicrobium) was identified using microbial community analysis. Intermittent dosage of PAC-MnOx at start-up period was likely to generate a cake layer effectively contributing to autocatalytic oxidation; The flux stablised at 41 L/(m²·h) after only 15-d operation, and the permeate of manganese was 0.089 mg/L. After 30-d operation, laser scattering particle analyzer (LASP) revealed that the particles (70.9 μm) within biofilm of gravity driven ceramic membrane (GDCM) grew larger compared with those present initially (48.5 μm) due to the newly formed biogenic MnOx attached to the carrier PAC, indicated by Raman analysis and X-ray Diffraction (XRD) analysis. Mn(III) as the predominant valence in MnOx conferred its outstanding catalytic oxidative capacity, as evidenced by X-ray photoelectron spectroscopy (XPS) analysis. SEM-EDS mapping demonstrated that a uniform flower-like birnessite structure was formed on the PAC surface, facilitating the transformation of MnOx to newly-formed birnessite on the vicinity of GDCM. Taking advantage of PAC and birnessite, the gravity driven filtration system developed in this study is anticipated to be an effective water treatment technique, particularly suitable for small footprint decentralized water supply sanitation.]]> Tue 09 Aug 2022 14:35:25 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47979 Na+ > K+. It was also observed that at salt concentrations above 100 mM for Na+, above 10 mM for K+ and Mg2+ but between 0.1 and 10 mM for Ca2+ in the presence of greater than 4 ppm of SDS, the cations can complex with the SDS in the system and suppress foam formation due to the surfactant precipitation. Foam fractionation was able to remove perfluorohexane sulphonic acid (PFHxS), perfluorooctanoic acid (PFOA) and perfluorooctane sulphonic acid (PFOS) from a sample of Australian groundwater to below the analytical detection limit of 0.1 ppb within 60 min with SDS being used as the co-foaming agent, but was unable to remove the short chain perfluorobutanoic acid (PFBA).]]> Tue 02 Jul 2024 14:29:32 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30779 2+ and Cu²⁺ on the oxidative degradation of Amoxicillin (AMX) by heterogeneous Fenton-like oxidation using nanoscale zero-valent iron (nZVI) as a catalyst was investigated. It was found that about 90.0% and 54.7% of AMX was degraded in the presence of 1 mM Cu²⁺ and 1 mM Mg²⁺ ions respectively, while 60.2% of AMX was removed by the control sample. Scanning electron microscopy (SEM) indicated that nZVI aggregated visibly after degradation of amoxicillin. X-ray photoelectron spectrometer (XPS) confirmed the reduction of Cu²⁺ to Cu⁰ by Fe⁰ on nZVI’s surface to form similar Fe/Cu bimetal to accelerate the degradation of AMX, and magnesium oxides or hydroxides formed on the surface of nZVI to restrain the removal of AMX. X-ray diffraction (XRD) demonstrated the existence of Fe⁰ in fresh nZVI and the corrosion aggregation of nZVI to form iron oxides or hydroxides after reaction. Kinetics studies demonstrated a pseudo first-order kinetics model for the oxidative degradation with the observed maximum K_obs as 0.0867 min⁻¹ in the presence of 1 mM Cu²⁺. The reason for this enhanced bimetallic catalytic activity is discussed.]]> Sat 24 Mar 2018 07:37:52 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26341 Sat 24 Mar 2018 07:35:56 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:26710 Sat 24 Mar 2018 07:26:22 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:25043 Sat 24 Mar 2018 07:10:43 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47494 Mon 23 Jan 2023 11:47:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:38185 Mon 06 May 2024 14:27:36 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48641 Fri 24 Mar 2023 13:30:38 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:50208 Fri 07 Jul 2023 10:52:17 AEST ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:34023 Fri 01 Feb 2019 10:37:19 AEDT ]]>