https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:48350 Wed 15 Mar 2023 09:56:49 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33206 Wed 12 Sep 2018 16:43:08 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44507 Wed 07 Feb 2024 14:51:21 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36302 Thu 28 Oct 2021 12:35:36 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33207 o), Fe(III) oxide and cow manure increased Cr(VI) retention. The effect of S^o on Cr(VI) sorption is mediated through a decrease in soil pH, which facilitated an increased retention of Cr(VI) as measured by Freundlich sorption coefficient from 0.079 (in pristine soil, pH7.15) to 21.06L/kg (in S^o amended soil, pH4.08). Also, Fe(III) oxide addition at 5% has favoured for an increase in the retention of Cr(VI) (K_f =91.15L/kg). Cow manure promoted Cr(VI) reduction, possibly due to the presence of functional groups that are present along with dissolved organic carbon and also by increased microbial activity. It is concluded that the mitigation of Cr toxicity is brought about by the addition of amendments which manipulate the properties of soil to increase retention of Cr(III) and Cr(VI).]]> Thu 21 Oct 2021 12:51:17 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:8891 Sat 24 Mar 2018 08:40:44 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:7480 Sat 24 Mar 2018 08:38:48 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21229 Casuarina cunninghamiana subsp. cunninghamiana) or grasses (Cynodon dactylon, Paspalum distichum, Pennisetum clandestinum ) is important in converting bars to benches. Thirdly, narrower segments which developed since 1963 have contracted by small-scale accretion on both banks. These deposits are steeply dipping, interbedded sand and mud trapped by stoloniferous and rhizomatous grasses (C. dactylon, P. distichum, P. clandestinum) which also rapidly stabilise the deposits. Fourthly, rare laterally migrating, small radius bends have contracted by recent point bar formation greatly exceeding cutbank recession rates. Point bar formation is controlled by secondary currents producing inclined stratified coarse sands without the influence of vegetation. Lastly, rare, overwidened, non-migrating, large radius bends have greatly contracted by the infilling of dissecting chutes across the convex bank. Establishment of stoloniferous and rhizomatous clonal grasses (Phragmites australis, C. dactylon, P. distichum, P. clandestinum) is important in inducing sedimentation of the chutes. Contraction has produced a much narrower channel than the design width between river training fences which were installed progressively between the 1960s and 1990s. The recent flood history of Widden Brook has not included any catastrophic floods of a size similar to February 1955. Our work demonstrates that both trees and grasses can be associated with narrower channel widths and that the causal link between width and vegetation type is more complex than usually acknowledged.]]> Sat 24 Mar 2018 07:53:04 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24099 Sat 24 Mar 2018 07:11:45 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45175 2+, Mn²⁺, Cu²⁺, H₂PO₄⁻ and SO₄²⁻) and organic acids (oxalic acid and citric acid). SEM and TEM analyses indicated that the MOF as a support efficiently prevent NZVI from aggregation for quick and effective removal of As(III). Through the non-linear least-squares (NLLS) adjustment, As(III) removal by MOF-NZVI could be well fitted by pseudo first and second order reaction kinetics, as well as the Freundlich isotherm. FTIR, XRD and XPS results verified that NZVI and iron oxyhydroxides (Fe₃O₄, γ-Fe₂O₃, γ-FeOOH and α-FeOOH) might be responsible for the effective removal of As(III) and its oxidized product As(V) with an adsorption capacity of 360.6 mg As per g NZVI through chemical oxidation and physical adsorption. This work indicates that MOF-NZVI with good reusability and high efficiency is promising for application in As(III)-polluted wastewater treatment.]]> Fri 28 Oct 2022 11:28:57 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37874 Fri 28 May 2021 10:53:02 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38746 1 %) and rare (<0.1 %) microbial taxa showed that a larger number of rare members (phylotype) displayed greater overall range in activity than was apparent for more abundant members. Certain taxa from both abundant and rare populations varied rapidly in their 16S rRNA levels in response to tidal cycling. The observation of rRNA accumulation in response to drying and rewetting was used to divide the microbial community structure into 'early responders' (within 3 h of dry-down or wet-up) and 'delayed responders' (3+ h after wet-up). Response patterns were phylogenetically constrained across supra- to subtidal zones across all tidal stages. Microbial iron- and sulfur-cycling networks included these rare but active taxa, illustrating their spatiotemporal complexity, which should be considered for an accurate assessment of bioremediation efficiency, and specially for validating predictive biogeochemical models of long-term CASS ecosystems.]]> Fri 21 Jan 2022 12:35:02 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49389 Fri 12 May 2023 14:34:02 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33161 Fri 07 Sep 2018 16:40:17 AEST ]]>