ORCID Profile
0000-0002-5267-7262
Current Organisation
Murdoch University
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Petroleum and Coal Geology | Industrial Chemistry | Electrochemistry | Hydrometallurgy | Inorganic Geochemistry | Mineral Processing/Beneficiation | Geochemistry | Resources Engineering and Extractive Metallurgy
Oil and Gas Exploration | Mineral Exploration not elsewhere classified | Primary Mining and Extraction of Mineral Resources not elsewhere classified | Mining and Extraction of Copper Ores |
Publisher: Elsevier BV
Date: 02-2015
Publisher: Elsevier BV
Date: 2016
Publisher: Elsevier BV
Date: 07-2018
Publisher: The Electrochemical Society
Date: 28-04-2006
DOI: 10.1149/1.2196010
Abstract: The Caron process involves the oxidative dissolution of pre-reduced iron alloys containing nickel, cobalt and copper in ammoniacal carbonate solutions. This study has demonstrated that passivation is exhibited by nickel and cobalt at higher potentials than previously established for iron. It is shown that alloys of iron with nickel and cobalt also undergo passivation at low potentials resulting in inhibition of the dissolution of the valuable metals. The potential regions of active dissolution of each of these metals in ammonia-ammonium carbonate solutions have been established. The effect of thiosulphate and cobaltammine complex ions on the dissolution of iron and nickel was found to be significant in that thiosulphate appears to partially prevent the passivation of nickel while the presence of cobaltammine ions leads to lower apparent anodic current densities. Possible mechanisms for the passivation processes and for the effects of thiosulfate and cobaltammines on the dissolution are presented.
Publisher: Elsevier BV
Date: 03-2020
Publisher: Elsevier BV
Date: 07-2015
Publisher: Elsevier BV
Date: 2012
Publisher: Informa UK Limited
Date: 12-12-2013
Publisher: Elsevier BV
Date: 2019
Publisher: MDPI AG
Date: 18-03-2022
DOI: 10.3390/MEMBRANES12030343
Abstract: The mass production of lithium-ion batteries and lithium-rich e-products that are required for electric vehicles, energy storage devices, and cloud-connected electronics is driving an unprecedented demand for lithium resources. Current lithium production technologies, in which extraction and purification are typically achieved by hydrometallurgical routes, possess strong environmental impact but are also energy-intensive and require extensive operational capabilities. The emergence of selective membrane materials and associated electro-processes offers an avenue to reduce these energy and cost penalties and create more sustainable lithium production approaches. In this review, lithium recovery technologies are discussed considering the origin of the lithium, which can be primary sources such as minerals and brines or e-waste sources generated from recycling of batteries and other e-products. The relevance of electro-membrane processes for selective lithium recovery is discussed as well as the potential and shortfalls of current electro-membrane methods.
Publisher: Elsevier BV
Date: 06-2022
Publisher: Elsevier BV
Date: 10-2021
Publisher: Elsevier BV
Date: 04-2022
Publisher: Informa UK Limited
Date: 29-12-2009
Publisher: Elsevier BV
Date: 05-2013
Publisher: MDPI AG
Date: 30-11-2021
DOI: 10.3390/MET11121935
Abstract: Electronic waste is a growing waste stream globally. With 54.6 million tons generated in 2019 worldwide and with an estimated value of USD 57 billion, it is often referred to as an urban mine. Printed circuit boards (PCBs) are a major component of electronic waste and are increasingly considered as a secondary resource for value recovery due to their high precious and base metals content. PCBs are highly heterogeneous and can vary significantly in composition depending on the original function. Currently, there are no standard methods for the characterisation of PCBs that could provide information relevant to value recovery operations. In this study, two pre-treatments, smelting and ashing of PCB s les, were investigated to determine the effect on PCB characterisation. In addition, to determine the effect of particle size and element-specific effects on the characterisation of PCBs, s les were processed using four different analytical methods. These included multi-acid digestion followed by inductively coupled plasma optical emission spectrometry (ICP-OES) analysis, nitric acid digestion followed by X-ray fluorescence (XRF) analysis, multi-acid digestion followed by fusion digestion and analysis using ICP-OES, and microwave-assisted multi-acid digestion followed by ICP-OES analysis. In addition, a mixed-metal standard was created to serve as a reference material to determine the accuracy of the various analytical methods. Smelting and ashing were examined as potential pre-treatments before analytical characterisation. Smelting was found to reduce the accuracy of further analysis due to the volatilisation of some metal species at high temperatures. Ashing was found to be a viable pre-treatment. Of the four analytical methods, microwave-assisted multi-acid digestion offered the most precision and accuracy. It was found that the selection of analytical methods can significantly affect the accuracy of the observed metal content of PCBs, highlighting the need for a standardised method and the use of certified reference material.
Publisher: Academy of Science of South Africa
Date: 2017
Publisher: Institute of Metallurgy and Ore Benefication (Publications)
Date: 06-09-2022
Abstract: For the solvent extraction of copper from pregnant leach solutions, (PLS) a wide range of modern extractants is currently offered on the market, and its choice is a very important issue in the production of copper using the SX-EW (Solvent Extraction and Electrowinning) technology. The purpose of this work was to determine the optimal copper extractant for processing productive solutions of the Almaly deposit using the SX-EW. The studies were carried out with a productive solution obtained by leaching copper ores from the Almaly deposit of composition, g/dm3: 1) Cu– 0.262, Fe–17.97, SiO2–0.36. The results of copper extraction from model solutions showed that the maximum extraction of copper (94%) is observed when using the extractant 5% Acorga 5640, while the other extractants did not provide a high degree of extraction of 10% Lix984 - 93% 10% Acorga 5640 - 91% 10% Acorga 5910 and 10% Acorga 5747 - 85% each. According to the results of the retraction process, a high degree of copper extraction from the organic phase (90.2 and more) was ensured when using extractants of 5% Acorga 5640, 10% Lix984, and 10% Acorga 5640, the minimum - at 10% Acorga 5910 (88.2%). For the extraction of copper from the productive solution of the Almaly deposit 5% Acorga 5640 was chosen as the optimal extractant.
Publisher: Elsevier BV
Date: 2013
Publisher: Elsevier BV
Date: 09-2018
Publisher: Elsevier BV
Date: 02-2018
Publisher: Elsevier BV
Date: 12-2010
Publisher: Springer Science and Business Media LLC
Date: 30-08-2023
DOI: 10.1007/S11837-023-06093-X
Abstract: Battery discharging prior to size reduction is an essential treatment in spent lithium-ion battery recycling to avoid the risk of fire and explosion. The main challenge for discharging the residual charges by immersion in an electrolyte solution is corrosion because of electrolysis reactions occurring at the battery terminals. This study investigated the discharging process of 18650 cylindrical lithium-ion batteries (LiBs) in NaCl and NaOH solutions and the generation of corrosion products, with the aim of developing a safe and clean discharging system for practical applications. The results show that water electrolysis is the primary reaction during battery immersion in either NaCl or NaOH solutions. Different forms of corrosion occur in each solution. Unlike the NaCl solution, which severely corroded the positive terminal of the battery, resulting in significant amount of solid residue, build-up of fluoride ions, and chlorine gas evolution, in the NaOH solution, a darkened surface of the negative terminal was the only obvious solid product, with no solid residue in the bulk solution, while oxygen gas was evolved. The NaOH solution was found to reduce battery capacity to a residual capacity range of 0–25 mAH after immersing batteries in the solution for 20 h. This value puts the battery in a safe condition for subsequent mechanical treatment. The results indicated that NaOH creates a clean discharging system and can potentially be reused.
Publisher: Elsevier BV
Date: 02-2022
Publisher: Springer Science and Business Media LLC
Date: 17-03-2021
Publisher: Elsevier BV
Date: 11-2017
Publisher: Elsevier BV
Date: 02-2015
Publisher: Elsevier BV
Date: 08-2021
Publisher: MDPI AG
Date: 10-2019
DOI: 10.3390/MET9101070
Abstract: In this study, synthetic zirconolite s les with a target composition Ca0.75Ce0.25ZrTi2O7, prepared using two different methods, were used to study the stability of zirconolite for nuclear waste immobilisation. Particular focus was on plutonium, with cerium used as a substitute. The testing of destabilisation was conducted under conditions previously applied to other highly refractory uranium minerals that have been considered for safe storage of nuclear waste, brannerite and betafite. Acid (HCl, H2SO4) leaching for up to 5 h and alkaline (NaHCO₃, Na2CO3) leaching for up to 24 h was done to enable comparison with brannerite leached under the same conditions. Ferric ion was added as an oxidant. Under these conditions, the synthetic zirconolite dissolved much slower than brannerite and betafite. While the most intense conditions were observed previously to result in near complete dissolution of brannerite in under 5 h, zirconolite was not observed to undergo significant attack over this timescale. Fine zirconolite dissolved faster than the coarse material, indicating that dissolution rate is related to surface area. This data and the long term stability of zirconolite indicate that it is a good material for long-term sequestration of radioisotopes. Besides its long term durability in the disposal environment, a wasteform for fissile material immobilisation must demonstrate proliferation resistance such that the fissile elements cannot be retrieved by leaching of the wasteform. This study, in conjunction with the previous studies on brannerite and betafite leaching, strongly indicates that the addition of depleted uranium to the wasteform, to avert long term criticality events, is detrimental to proliferation resistance. Given the demonstrated durability of zirconolite, long term criticality risks in the disposal environment seem a remote possibility, which supports its selection, above brannerite or betafite, as the optimal wasteform for the disposition of nuclear waste, including of surplus plutonium.
Publisher: Elsevier BV
Date: 11-2012
Publisher: Elsevier BV
Date: 05-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8RA07073C
Abstract: LFO-doped mesoporous silica yielded high removal rate of dye, due to the dark adsorption and visible light-induced photo-Fenton degradation.
Publisher: Informa UK Limited
Date: 10-04-2023
Publisher: Informa UK Limited
Date: 05-04-2023
Publisher: Elsevier BV
Date: 10-2019
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 09-2016
Publisher: Informa UK Limited
Date: 20-11-2017
Publisher: Elsevier BV
Date: 11-2013
Publisher: Elsevier BV
Date: 05-2018
Publisher: Informa UK Limited
Date: 15-11-2007
Publisher: Elsevier BV
Date: 07-2019
Publisher: Elsevier BV
Date: 11-2016
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 05-2018
Publisher: Informa UK Limited
Date: 18-12-2019
Publisher: Elsevier BV
Date: 05-2017
Publisher: Elsevier BV
Date: 11-2017
Publisher: MDPI AG
Date: 09-2023
DOI: 10.3390/SU151713171
Publisher: Elsevier BV
Date: 06-2018
Publisher: Elsevier BV
Date: 06-2018
Publisher: Elsevier BV
Date: 12-2017
Publisher: MDPI AG
Date: 19-08-2021
DOI: 10.3390/MET11081313
Abstract: Electronic e-waste (e-waste) is a growing problem worldwide. In 2019, total global production reached 53.6 million tons, and is estimated to increase to 74.7 million tons by 2030. This rapid increase is largely fuelled by higher consumption rates of electrical and electronic goods, shorter life cycles and fewer repair options. E-waste is classed as a hazardous substance, and if not collected and recycled properly, can have adverse environmental impacts. The recoverable material in e-waste represents significant economic value, with the total value of e-waste generated in 2019 estimated to be US $57 billion. Despite the inherent value of this waste, only 17.4% of e-waste was recycled globally in 2019, which highlights the need to establish proper recycling processes at a regional level. This review provides an overview of global e-waste production and current technologies for recycling e-waste and recovery of valuable material such as glass, plastic and metals. The paper also discusses the barriers and enablers influencing e-waste recycling with a specific focus on Oceania.
Publisher: Informa UK Limited
Date: 29-07-2019
Publisher: Elsevier BV
Date: 06-2018
Publisher: Informa UK Limited
Date: 12-01-2022
Publisher: Elsevier BV
Date: 2017
Publisher: Elsevier BV
Date: 10-2015
Publisher: Informa UK Limited
Date: 26-09-2022
Publisher: Elsevier BV
Date: 09-2022
Publisher: Elsevier BV
Date: 11-2023
Publisher: Elsevier BV
Date: 08-2021
Publisher: Elsevier BV
Date: 03-2019
DOI: 10.1016/J.JENVMAN.2018.12.051
Abstract: LaFeO
Publisher: IOP Publishing
Date: 11-2021
DOI: 10.1088/1755-1315/882/1/012001
Abstract: Lithium battery cathodes contain lithium, cobalt, nickel, and manganese. Recycling of spent lithium batteries aims to recover these elements for re-use. Liberation of cathode materials from other metals in the battery such as aluminium, copper, and iron, is essential to obtain a good leaching efficiency in the recovery of valuable metals from end-of-life lithium batteries. This study investigates the behaviour of cathode materials and other metals in spent 18650 lithium batteries during leaching in H 2 SO 4 solution with and without NaOH pre-treatment. Dissolution of aluminium using NaOH is a selective method to separate the metal from other elements. The influence of a 2-hour NaOH pre-treatment on subsequent acid leaching of cathode materials was investigated at both room temperature and 80°C. The extraction of aluminium increased to 75% at a higher temperature. Lithium concentration in the pregnant leach solution from acid leaching also increases with NaOH pre-treatment. The pre-treatment had a negligible effect on nickel, manganese, iron, and copper extraction. However, the cobalt extraction with NaOH pre-treatment was significantly lower. The result was likely due to indirect impact of less hydrogen gas was generated from a lower Al amount. The lattice structure of the leach residue for the s le with NaOH pre-treatment was monoclinic rather than rhombohedral due to stronger delithiation.
Publisher: Elsevier BV
Date: 05-2013
Publisher: MDPI AG
Date: 27-03-2014
Publisher: Springer Science and Business Media LLC
Date: 27-04-2022
Publisher: Elsevier BV
Date: 04-2014
Start Date: 02-2014
End Date: 06-2018
Amount: $615,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 2014
End Date: 12-2014
Amount: $700,000.00
Funder: Australian Research Council
View Funded Activity