https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34281 Tue 26 Feb 2019 12:16:19 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24636 80%). Acinetobacter venetianus immobilized on MBC demonstrated superior efficiency in degrading diesel oil (94%) compared to planktonic cells culture (82%) over a 3-day period. Moreover, the simultaneous adsorption and biodegradation of diesel oil using these immobilized cells fitted well to the pseudo second order (R² > 0.99). Scanning electron microscopy (SEM) revealed that through absorption, cells attached well to the cavum of MBC stalk cells. Fourier transform infrared analysis (FTIR) revealed that a large number of bands at 1300-1500 cm^-1 existed, demonstrating that the diesel oil was degraded and new bands were formed. Gas Chromatography Mass Spectrum (GC-MS) analysis indicated the immobilized cells could degrade diesel oil into esters and aldehydes. Results justified the applicability of MBC as the carrier matrix for immobilizing microorganisms in removing diesel oil compounds from industrial wastewater.]]> Tue 14 Nov 2023 13:37:32 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30099 2, O₂ and air) was employed. Results indicated 100% of phenanthrene was removed, total COD removed increased to 81.5%, 77.2% and 68.7% using N₂, O₂ and air–Fe NPs, respectively. In addition, Fe NPs were confirmed by scanning electron microscopy (SEM) and X-ray energy-dispersive spectroscopy (EDS). Finally, the degraded metabolites were identified by GC–MS to understand the degradation pathway]]> Sat 24 Mar 2018 07:37:59 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25178 eucalyptus leaf extracts was used to remove mixed Cr(VI) and Cu(II), where the efficiency was 58.9% and 33.0%, respectively. In contrast, only 20.2% of Cr(VI) and 11.8% of Cu(II) were removed by adsorption using eucalyptus leaf extracts. In addition, the removal mechanism for mixed Cr(VI) and Cu(II) based on both adsorption and reduction by Fe NPs was confirmed by various characterization techniques, including the formations of Fe NPs, iron oxides and capping layer. Furthermore, the kinetics suggested that firstly, their sorption followed the pseudo second-order model well; and secondly, reduction of Cr(VI) and Cu(II) followed the pseudo-first-order model well. Finally, Fe NPs not only removed Cr(VI) and Cu(II), but also Pb(II) and Zn(II) in electroplating wastewater. This provides a new insights into the removal of metal ions using green Fe NPs with a low cost and environmentally friendly remediation strategy.]]> Sat 24 Mar 2018 07:13:53 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32675 Acinetobacter venetianus in 96 h, while the removal efficiency of chemical oxygen demand (COD) in the aqueous phase was only 56.8%, indicating that degraded metabolites existed in solution. To solve this problem, a Fenton-like system consisting of nanoscale zero-valent iron (nZVI) and hydrogen peroxide was used for further oxidation of the metabolites after biodegradation. Results showed that the total COD removal increased from 56.8% to 89% under the optimal condition. In addition, effects of initial pH (2.0–9.0), ZVI dosage (0–2.0 g L-1), hydrogen peroxide (H₂O₂) dosage concentration (0–15 mmol L-1) and temperature (298–308 K) on the treatment efficiency of the combined process were studied. Scanning electron microscopy (SEM) demonstrated that changes to the surface of nZVI occurred. GC-MS revealed that the degraded metabolites were mineralized practically by nZVI/H₂O₂ system. The results points towards the potential of Fenton-like oxidation as a short post-treatment after a biological process for the treatment of organic pollutants in wastewater.]]> Fri 17 Nov 2023 11:42:05 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41801 Fri 12 Aug 2022 12:24:43 AEST ]]>