https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46637 Wed 28 Feb 2024 14:49:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45151 Wed 22 Mar 2023 18:18:04 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43514 Wed 21 Sep 2022 11:18:21 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43505 Wed 21 Sep 2022 10:29:26 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24419 Wed 10 Nov 2021 15:05:12 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42940 Wed 07 Sep 2022 15:23:30 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43096 Wed 07 Feb 2024 17:17:32 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37009 Wed 05 Aug 2020 14:09:19 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46968 Tue 30 Apr 2024 09:39:02 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46721 Tue 29 Nov 2022 11:20:27 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47037 CO32– > SO42– > Cl– > NO3–, although no significant inhibitory effects were observed with cations like Na+, K+, Mg2+, Ca2+, and Al3+. The positive correlation of AsV adsorption capacity with temperature demonstrated that the endothermic process and the negative value of Gibbs free energy increased (−14.95 to −12.47 kJ/mol) with increasing temperature (277 to 313 K), indicating spontaneous reactions. Desorption and regeneration showed that recycled Fe-chips, Fe-salt, and Zr–Fe-salt-coated biochars can be utilized for the effective removal of AsV up to six-repeated cycles.]]> Tue 13 Dec 2022 14:15:30 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47026 Tue 13 Dec 2022 12:58:24 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47014 Tue 13 Dec 2022 11:48:22 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44258 Tue 11 Oct 2022 12:42:28 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39474 Acacia inaequilatera, Acacia pyrifolia, Acacia stellaticeps, Banksia seminuda, Chloris truncata, Hakea prostrata, Hardenbergia violacea, and Triodia wiseana were transplanted in a soil contaminated with diesel and engine oil as TPH at pollution levels of 4,370 (TPH1) and 7,500 (TPH2) mg kg^-1, and an uncontaminated control (TPH0). After 150 days, the presence of TPH negatively affected the plant growth, but the growth inhibition effect varied between the plant species. Plant growth and associated root biomass influenced the activity of rhizo-microbiome. The presence of B. seminuda, C. truncata, and H. prostrata significantly increased the TPH removal rate (up to 30% compared to the unplanted treatment) due to the stimulation of rhizosphere microorganisms. No significant difference was observed between TPH1 and TPH2 regarding the plant tolerance and rhizoremediation potentials of the three plant species. The presence of TPH stimulated cluster root formation in B. seminuda and H. prostrata which was associated with enhanced TPH remediation of these two members of Proteaceae family. These results indicated that B. seminuda, C. truncata, and H. prostrata wild plant species could be suitable candidates for the rhizoremediation of TPH-contaminated soil.]]> Tue 09 Aug 2022 14:32:31 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43850 Tue 04 Oct 2022 11:53:40 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45345 −1 for 24 h by Zr–FeBC and Fe-BC at pH 5 and 4, respectively. Desorption studies were performed to investigate the reusability, cost-effectiveness and stability of the adsorbents Zr–FeBC and Fe-BC. The adsorption–desorption study suggests that both examined biochars have considerable potentiality as adsorbent candidates in removing as well as recovery of P from wastewaters. Results also reveal that the regenerated Zr–FeBC and Fe–BC could be utilized repetitively in seven adsorption–desorption cycles using NaOH as a desorbing agent, which greatly reduces the P-removal cost from wastewaters. Thus, P enriched biochar could potentially be used as fertilizer in the agriculture sector.]]> Thu 27 Oct 2022 15:20:47 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39790 d) ranged from 5 to 229 mL/g (median: 28 mL/g), with 63% of the Fijian soils and 35% of the Australian soils showing K_d values that exceeded the observed median Kd. Multiple linear regression showed that TOC, amorphous aluminum and iron oxides contents, anion exchange capacity, pH, and silt content, jointly explained about 53% of the variance in PFOS K_d in soils. Variable charge soils with net positive surface charges, and moderate to elevated TOC content, generally displayed enhanced PFOS sorption than in temperate or tropical soils with TOC as the only sorbent phase, especially at acidic pH ranges. For the first time, two artificial neural networks were developed to predict the measured PFOS K_d (R² = 0.80) in the soils. Overall, both TOC and surface charge characteristics of soils are important for describing PFOS sorption.]]> Thu 23 Jun 2022 14:06:17 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34735 Thu 21 Oct 2021 12:51:21 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49928 polyethylene>nylon>polyester. The concentrations of adsorbed Pb and PFOS were 4-25% and 20-85% higher in aged MFs and varied among the polymer types. The increased contaminant adsorption was linked with the altered surface area and the hydrophobic/hydrophilic characteristics of the samples. Overall, the present study demonstrates that biofilms play a decisive role in contaminant-plastic interactions and significantly enhance the vector potential of MFs for toxic environmental contaminants. We anticipate that knowledge generated from this study will help refine the planetary risk assessment of MPs.]]> Thu 15 Jun 2023 12:09:35 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34677 In vivo studies were conducted using juvenile swine as a surrogate model for young children. Two compartment pharmacokinetic models were used to analyze the biological response produced by Pb oral solution and spiked soils. Absolute and relative bioavailability of Pb in soils (oral dose of 100 µ g Pb/kg body weight/day) were estimated by comparing them with intravenously administered soluble Pb salt (25 µ g Pb/kg/day) and orally administered the same Pb salt [Pb acetate = (CH₃COO)₂Pb·3H₂O] administered to 3 juvenile pigs per treatment. Lead bioaccessibility was calculated using the in vitro RBALP (i.e. relative bioaccessibility leaching procedure) method. The in vitro results of RBALP were compared to in vivo relative Pb bioavailability to ascertain whether the changes in bioaccessibility correlated with the in vivo data. Although the in vivo Pb relative bioavailability (RB) in all soils except in MLA (Mount Lofty Acidic) revealed an increase (18%-159%) in the presence of Zn, the in vitro RBALP bioaccessibility results indicated otherwise (1%-38% decrease). In vivo RB of Pb in MLA declined by 37% in the presence of Zn. However, the RBALP in vitro bioaccessible Pb did not correlate with the relative bioavailabilities of Pb in the juvenile swine dosing experiment. Caution is therefore needed when predicting Pb bioavailability/bioaccessibility in the presence of metal mixtures. The literature contains much information on the correlation of metal and metalloid bioaccessibility with their bioavailability. There is, however, a paucity of studies investigating the effects of other metals on Pb and their IVIVC (in vitro and in vivo correlations). The current study addresses this knowledge gap by assessing in vivo and in vitro bioavailability of Pb in the presence of Zn.]]> Thu 11 Apr 2019 15:08:08 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42912 -1 and ∼33,000 to ∼150 μg L^-1, respectively. This trend was interrupted by a sharp rise in aqueous As(III) and Fe(II) caused by reductive dissolution of As-bearing Fe(III) phases in a sediment retention pond. Attenuation of Fe and As mobility occurred via formation of As(V)-rich schwertmannite, As(V)-rich jarosite, and amorphous ferric arsenate (AFA), resulting in solid-phase As concentrations spanning ∼13 to ∼208 g kg-1. Schwertmannite and jarosite retained As(V) predominantly by structural incorporation involving AsO₄-for-SO₄ substitution at up to ∼40 and ∼22 mol %, respectively. Arsenic strongly influenced Fe(III) mineral formation, with high As(V) concentrations causing formation of AFA over schwertmannite. Arsenic also strongly influenced Fe(III) mineral evolution over time. In particular, increasing levels of As(V) incorporation within schwertmannite were shown, for the first time, to enhance the transformation of schwertmannite to jarosite. This significant discovery necessitates a re-evaluation of the prevailing paradigm that As(V) retards schwertmannite transformation.]]> Thu 02 Nov 2023 14:53:12 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:51866 Thu 02 Nov 2023 14:47:06 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43512 Thu 02 Nov 2023 14:46:48 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47848 Thu 02 Feb 2023 16:32:49 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31331 Sat 24 Mar 2018 08:44:39 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31300 Sat 24 Mar 2018 08:44:12 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30449 Sat 24 Mar 2018 07:38:06 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31024 Sat 24 Mar 2018 07:34:51 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30284 Sat 24 Mar 2018 07:33:35 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27553 Sat 24 Mar 2018 07:33:15 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26475 -1), to simultaneously determinate multiple petroleum hydrocarbons (PHs) in real mixture samples. This system includes: an object oriented baseline correction; Band decomposition (curve fitting) method with mathematical optimization; and Artificial Neural Network (ANN) for determination, which is suitable for the characteristics of this IR regions, where the spectra are normally with low signal to noise ratio and high density of peaks. BTEX components are potentially lethal carcinogens and contained in many petroleum products. As a case study, six BTEX components were determinate automatically and simultaneously in mixture vapor samples. The robustness of the BTEX determination was validated using real petroleum samples, and the prediction results were compared with gas chromatography-mass spectrometry (GC-MS).]]> Sat 24 Mar 2018 07:27:14 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28211 in situmonitoring. This article outlines an application of the ET system to determine chloride (Cl) simultaneously, and multi cationic metal ions, including calcium (Ca), cadmium (Cd), copper (Cu) and lead (Pb). In this study, Principal Component Analysis (PCA) was applied as a data compaction technique to reduce the complexity of data from the ISE array without losing much information. A patent data preprocessing method, geneticICA, was utilized to improve the prediction accuracy of ANN. Moreover, Orthogonal Experiment Design was employed for minimizing the number of training samples without losing any quality characteristics for the specific ions. Using our methodology means that results can be obtained rapidly and accurately without disturbing the natural speciation. The robustness and appropriateness of the approach were assessed using the mean relative error (MRE). When configured and optimized, the ET system can quantify the concentration of the four desired metals and chloride with the average MRE being lower than 0.10.]]> Sat 24 Mar 2018 07:23:51 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39614 Mon 29 Jan 2024 18:47:47 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:44805 0.9, p < 0.001), which was affected by plant identity and P levels. The results indicated that an integrated approach involving wild plant species and optimum P amendment, which was determined through experimentation using different plant species, was an efficient way to remediate soil contaminated with TPH.]]> Mon 24 Oct 2022 09:24:40 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52720 Mon 23 Oct 2023 16:25:51 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32295 Mon 21 May 2018 15:30:58 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39730 Mon 13 May 2024 13:29:27 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:38496 Mon 11 Oct 2021 15:51:00 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37372 Mon 11 Mar 2024 17:41:40 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36783 n). It was found there were two bands coherent to the doublet at location 2954 and 2872 cm⁻¹, respectively can be applied to identify the fraction of carbon chains. From C₂₀ to C₃₇, by the increase of the C_n, the intensities of the two bands were reduced as demonstrated. There were another two doublets existed at the region from 1480 to 1450 cm⁻¹ and the region at 750 and 730 cm⁻¹. It was observed the intensity of one coherent band at each of these regions was increased following the increase on the C_n. The bands center at 1462 and 730 cm⁻¹ were increased from C₂₀ to C₃₇. The intensity ratio of the coherent bands can be applied to identify the C_n. Successfully identify four different petroleum products with different fractions of carbon chains in soil samples, is evidence the theory can be applied to investigate the fraction of carbon chains in soil. Coupling with handheld FTIR, it is possible to rapidly estimate the dominant fraction of C_n in soil in field.]]> Mon 06 Jul 2020 09:25:42 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:46864 Mon 05 Dec 2022 08:29:59 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33876 Fri 30 Aug 2019 13:07:57 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39301 Fri 03 Jun 2022 13:29:25 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36752 TM was developed for real-time measurement of multi-free ions in solution. The technique includes algorithms that have been developed to allow real-time measurement of a multitude of free ions simultaneously in solution. The ISE array system allows common ions: sodium (Na⁺), Potassium (K⁺), calcium (Ca²⁺), nitrate (NO₃⁻) and chloride (Cl⁻) to be measured in complex solution matrices. This is of value to agricultural irrigators and for monitoring water quality in lakes and streams. It can be adopted for the benefit of fertigation application, and water qualities are monitoring to ensure environmental protection authority (EPA) standards are achieved. The prediction accuracies of ISEs can be negatively impacted by pH, ionic strength and the interferences from other undesired ions. The ISE array system contained a self-developed algorithm to eliminate the interferences from the major ions existed in nature water. On the purpose of validating the prediction accuracy, 96 samples based on 22 different real water backgrounds were employed. Several chemicals were spiked into these samples for simulating the fertilizers and other water quality hazards. Based on the experiment results, it can be concluded that the system can strong ability to simultaneously determinate multi-free ions, regardless the pH, ionic strength and the interferences from major ions in nature water.]]> Fri 03 Jul 2020 09:40:42 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:39995 Fri 01 Jul 2022 13:49:31 AEST ]]>