https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34995 −1 biosolids for ≤50, 50–100, 100–250, 250–1000 μm size fractions, respectively. The Scanning Electron Microscope (SEM) images illustrated wrinkled and fractured surfaces due to degradation. The adsorption of dissolved organic matter onto microbeads was confirmed through FT-IR microscopy, while using Inductively Coupled Plasma Mass Spectrometer (ICP-MS) the presence of trace metals including Cd (2.34 ng g⁻¹), Cu (180.64 ng g⁻¹), Ni (12.69 ng g⁻¹), Pb (1.17 ng g⁻¹), Sb (14.43 ng g⁻¹), and Zn (178.03 ng g⁻¹) was revealed. Surface modified microbeads were capable of adsorbing Cu compared to the pure microbeads, which may be attributed to the complexation of Cu with dissolved organic matter associated with the microbeads in the matrix. It was further revealed that the biosolids derived microbead-metal complexes decreased soil respiration (up to ∼ 26%) and dehydrogenase activity (up to ∼ 39%). Hence, microbeads reaching biosolids during wastewater treatment are likely to serve as a vector for trace element contamination, transportation, and toxicity when biosolids are applied to soil.]]> Wed 29 May 2019 11:33:56 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41151 Wed 28 Feb 2024 14:56:22 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34231 C10 – C16, > C16 – C34, > C34 – C40. This clean-up step is important as this will affect subsequent sample preparation steps to separate TPH into its different fractions and individual components for assessing the level of contamination and the effectiveness of remediation for decision making based on risk assessment.]]> Wed 20 Feb 2019 15:55:26 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24638 Wed 11 Apr 2018 14:14:24 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32890 m) values were 90.90 and 75.75 mg/g at pH 5.5 and 8.5, respectively while the Freundlich equilibrium constant (K_f) values were 4.67 and 4.36 mg/g at pH 5.5 and 8.5, respectively. The rate of adsorption confirmed to follow pseudo-second order kinetics with a better correlation. The thermodynamic parameters predicted that the adsorption process is an endothermic and spontaneous process.]]> Wed 08 Aug 2018 09:51:25 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37013 Wed 05 Aug 2020 16:43:14 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:50685 Wed 01 May 2024 15:09:13 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:41991 Tue 16 Aug 2022 16:02:20 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43124 Tue 07 Nov 2023 15:33:46 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43866 Tue 04 Oct 2022 12:28:33 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43837 Tue 04 Oct 2022 11:46:28 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:40482 Thu 14 Jul 2022 08:46:09 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34100 0.999 with enhanced limits of detection and limits of quantification values. The method was applied to real samples for routine environmental monitoring of TPHs in an Australian contaminated site characterized by refueling station. Analysis of groundwater samples in the area showed a wide range of TPH concentrations as follows: 66–1,546,000 (C₁₀–C₁₄), 216–22,762 (C₁₅–C₂₈) and 105–2,103 (C₂₉–C₃₆) μg/L. This method has detected trace levels, thereby measuring a wider concentration range of TPHs. These more accurate measurements can lead to the appropriate application of risk assessments and remediation techniques.]]> Thu 07 Feb 2019 14:26:26 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30613 −, toxic contaminants CN⁻ and AsO₃³⁻/AsO₄³⁻, and anionic fluorosurfactants. The anionic fluorosurfactants mainly include perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), both of which have recently been listed as emerging contaminants and categorised as persistent organic pollutants. This review addresses recent advancements in the development of gold nanoparticle-based nano-sensors for such anions and outlines their performance limitations towards on-site applications.]]> Sat 24 Mar 2018 07:28:26 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31048 Sat 24 Mar 2018 07:25:47 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47550 Mon 23 Jan 2023 12:29:38 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:47494 Mon 23 Jan 2023 11:47:24 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:42373 Mon 22 Aug 2022 14:22:19 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:43027 3), fly ash (FA), unreacted lime (CaO) and portlandite (Ca[OH]₂) or calcite (CaCO₃). Chemical and mineralogical composition, leachate chemistry and textural properties of basic slags are helpful for understanding their nature and assessing their impacts on the environment. The characterization of various slags can be analyzed by different instrumental methods. Inductively coupled plasma mass spectrometry and optical emission spectrometry (ICP-MS/OES) are the most commonly analytical techniques for chemical composition, and X-ray diffractometry (XRD) is used to provide further information on types of minerals and their phases. Additionally, scanning electron microscopy (SEM) and electron probe microanalysis (EPMA) could be auxiliary to analyze some specific samples, which are not easily identified or quantified by XRD. Some slags have been commercialized to be the source of nutrients and soil amendments, with the major nutrients including P, S, Ca, Mg and silicon (Si). Slags from steel industry are rich in Ca and Mg, which are beneficial to deficient soils. Slags from coal combustion are a good source of sulfur, while the presence of calcium in the form of lime and gypsum helps to mitigate the soil acidity and improves soil structure. However, they also possibly contain toxic metal contaminants, such as chromium (Cr) and vanadium (V). There have been some concerns about the toxic effects of slag materials on farm animals. Slag poisoning of animals can be avoided or minimized by increasing the dissolution of slag through soil incorporation and by avoiding overgrazing of slag treated paddocks.]]> Mon 12 Sep 2022 11:14:42 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37159 Desmodesmus sp. MAS1 and Heterochlorella sp. MAS3 can be acclimated to extreme-acidic pH for sustainable production of biomass and biodiesel. Growth analysis indicated that both the microalgal strains possessed a passive uptake of CO₂ at pH 3.0 with biomass production of 0.25 g dry wt. L⁻¹ in Desmodemus sp. and 0.45 g dry wt. L⁻¹ in Heterochlorella sp.. Flow-cytometry analysis for reactive oxygen species, membrane permeability and neutral-lipids revealed the capabilities of both strains to adapt to the stress imposed by acidic pH. Lipid production was doubled in both the strains when grown at pH 3.0. In-situ transesterification of biomass resulted in 13–15% FAME yield in the selected microalgae, indicating their great potential in biofuel production.]]> Mon 12 Apr 2021 15:05:01 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41286 Mon 01 Aug 2022 11:41:28 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34241 Fri 22 Feb 2019 14:42:10 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49357 Fri 12 May 2023 12:35:22 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41795 Fri 12 Aug 2022 12:24:33 AEST ]]>