James Tardio

Influence of Rare Earth (La, Pr, Nd, Gd, and Sm) Metals on the Methane Decomposition Activity of Ni–Al Catalysts

Publisher: American Chemical Society (ACS)

Date: 22-05-2015

DOI: 10.1021/ACSSUSCHEMENG.5B00372

Role of Brønsted and Lewis acid sites on Ni/TiO2 catalyst for vapour phase hydrogenation of levulinic acid: Kinetic and mechanistic study

Publisher: Elsevier BV

Date: 09-2015

DOI: 10.1016/J.APCATA.2015.07.031

Structural characterization and catalytic evaluation of transition and rare earth metal doped ceria-based solid solutions for elemental mercury oxidation

Publisher: Royal Society of Chemistry (RSC)

Date: 2013

DOI: 10.1039/C3RA41441H

Mercury migration and speciation study during monoethylene glycol regeneration processes

Publisher: American Chemical Society (ACS)

Date: 07-05-2015

DOI: 10.1021/ACS.IECR.5B00492

Experimental study into the beneficiation of a ferruginous rare earth bearing lateritic ore by magnetising roasting and magnetic separation

Publisher: Elsevier BV

Date: 06-2019

DOI: 10.1016/J.MINENG.2019.04.019

Synthesis and characterisation of the uranium pyrochlore betafite [(Ca, U)2(Ti, Nb, Ta)2O7]

Publisher: Elsevier BV

Date: 09-2014

DOI: 10.1016/J.JHAZMAT.2014.07.062

Abstract: Betafite of composition [(Ca,U)2(Ti,Nb,Ta)2O7] was prepared via a solid state synthesis route. The synthesis was shown to be sensitive to initial reactant ratios, the atmosphere used (oxidising, neutral, reducing) and time. The optimum conditions for the synthesis of betafite were found to be heating the reactants required at 1150°C for 48 h under an inert gas atmosphere. XRD characterisation revealed that the synthesised betafite contained minor impurities. EPMA analysis of a sectioned surface showed very small regions of Ca-free betafite on grain boundaries as well as minor rutile impurities. Some heterogeneity between the Nb:Ta ratio was observed by quantitative EPMA but was generally within the nomenclature requirements stated for betafite. SEM analysis revealed the synthesised betafite was comprised mostly of hexaoctohedral crystals of ∼ 3 μm in diameter. XPS analysis of the s le showed that the uranium in the synthesised betafite was predominately present in the U(5+) oxidation state. A minor amount of U(6+) was also detected which was possibly due to surface oxidation.

Kinetics of uranium extraction from coffinite—A comparison with other common uranium minerals

Publisher: Elsevier BV

Date: 10-2018

DOI: 10.1016/S1003-6326(18)64858-7

Chemical and micro-structural characterisation studies on natural uraninite and associated gangue minerals

Publisher: Elsevier BV

Date: 05-2013

DOI: 10.1016/J.MINENG.2013.02.004

Phase equilibria study of CaO-Al2O3-SiO2-Na2O slags for smelting waste printed circuit boards

Publisher: Springer Science and Business Media LLC

Date: 29-04-2021

DOI: 10.1007/S11837-021-04683-1

An investigation on the effects of several anions on the dissolution of synthetic uraninite (UO2)

Publisher: Elsevier BV

Date: 04-2013

DOI: 10.1016/J.HYDROMET.2013.03.003

Experimental determination of liquidus temperature and phase equilibria of the CaO-Al2O3-SiO2-Na2O slag system relevant to e-waste smelting

Publisher: Springer International Publishing

Date: 2021

DOI: 10.1007/978-3-030-65489-4_26

The effect of [Fe]TOT on the dissolution of synthetic Pb-doped UO2 and Th-doped UO2

Publisher: Elsevier BV

Date: 04-2014

DOI: 10.1016/J.MINENG.2014.01.006

Catalytic Wet Oxidation of Ferulic Acid (A Model Lignin Compound) Using Heterogeneous Copper Catalysts

Publisher: American Chemical Society (ACS)

Date: 30-06-2007

DOI: 10.1021/IE070085D

Investigation into coal-based magnetizing roasting of an iron-rich rare earth ore and the associated mineralogical transformations

Publisher: Elsevier BV

Date: 12-2017

DOI: 10.1016/J.MINENG.2017.09.007

Selectivty Assessments of a Sequential Extraction Procedure for Potential Trace Metals’ Mobility and Bioavailability in Phosphate Rocks from Jordan Phosphate Mines

Publisher: Informa UK Limited

Date: 16-12-2013

DOI: 10.1080/15320383.2014.831397

Selective Organic Removal from the Alumina Industrial Liquor:  Wet Oxidation and Catalytic Wet Oxidation of Disodium Malonate

Publisher: American Chemical Society (ACS)

Date: 05-02-2002

DOI: 10.1021/IE010364F

Gold nanospikes based microsensor as a highly accurate mercury emission monitoring system

Publisher: Springer Science and Business Media LLC

Date: 23-10-2014

DOI: 10.1038/SREP06741

Hydrodeoxygenation activity of W modified Ni/H-ZSM-5 catalyst for single step conversion of levulinic acid to pentanoic acid: An insight on the reaction mechanism and structure activity relationship

Publisher: Elsevier BV

Date: 2018

DOI: 10.1016/J.APCATA.2017.11.008

Highly stable and active Ni-mesoporous alumina catalysts for dry reforming of methane

Publisher: Elsevier BV

Date: 2012

DOI: 10.1016/J.IJHYDENE.2011.10.036

Studying mercury partition in monoethylene glycol (MEG) used in gas facilities

Publisher: Elsevier BV

Date: 11-2015

DOI: 10.1016/J.FUEL.2015.07.047

An investigation on the dissolution of natural uraninite ores

Publisher: Elsevier BV

Date: 09-2013

DOI: 10.1016/J.MINENG.2013.06.013

Creating gold nanoprisms directly on quartz crystal microbalance electrodes for mercury vapor sensing

Publisher: IOP Publishing

Date: 07-2011

DOI: 10.1088/0957-4484/22/30/305501

Abstract: A novel electrochemical route is used to form highly {111}-oriented and size-controlled Au nanoprisms directly onto the electrodes of quartz crystal microbalances (QCMs) which are subsequently used as mercury vapor sensors. The Au nanoprism loaded QCM sensors exhibited excellent response-concentration linearity with a response enhancement of up to ∼ 800% over a non-modified sensor at an operating temperature of 28 °C. The increased surface area and atomic-scale features (step/defect sites) introduced during the growth of nanoprisms are thought to play a significant role in enhancing the sensing properties of the Au nanoprisms toward Hg vapor. The sensors are shown to have excellent Hg sensing capabilities in the concentration range of 0.123-1.27 ppm(v) (1.02-10.55 mg m(-3)), with a detection limit of 2.4 ppb(v) (0.02 mg m(-3)) toward Hg vapor when operating at 28 °C, and 17 ppb(v) (0.15 mg m(-3)) at 89 °C, making them potentially useful for air monitoring applications or for monitoring the efficiency of Hg emission control systems in industries such as mining and waste incineration. The developed sensors exhibited excellent reversible behavior (sensor recovery) within 1 h periods, and crucially were also observed to have high selectivity toward Hg vapor in the presence of ethanol, ammonia and humidity, and excellent long-term stability over a 33 day operating period.

Cold vapor integrated quartz crystal microbalance (CV-QCM) based detection of mercury ions with gold nanostructures

Publisher: Elsevier BV

Date: 07-2019

DOI: 10.1016/J.SNB.2019.04.022

Economical treatment of reverse osmosis reject of textile industry effluent by electrodialysis–evaporation integrated process

Publisher: Elsevier BV

Date: 2014

DOI: 10.1016/J.DESAL.2013.11.020

Performance assessment and hydrodynamic analysis of a submerged membrane bioreactor for treating dairy industrial effluent

Publisher: Elsevier BV

Date: 06-2014

DOI: 10.1016/J.JHAZMAT.2014.04.030

Abstract: Submerged membrane bioreactor (SMBR) is a relatively advanced technology for waste water treatment that involves integrated aerobic and anaerobic biological processes with membrane filtration. In the present investigation, hydrophobic polyvinylidene fluoride (PVDF) and hydrophilic polyacrylonitrile (PAN) hollow fiber (HF) membranes were tested in an indigenously fabricated SMBR for dairy effluent treatment under aerobic conditions using mixed microbial consortia. Effect of operating parameters such as suction pressure, degree of aeration and trans-membrane pressure (TMP) on membrane performance in terms of flux, rejection of turbidity, BOD and COD besides fouling characteristics was investigated. The observed optimum permeabilities of PVDF and PAN HF membranes were approximately 108 and 115 LMH bar(-1) with high extent of impurity removal. The rejection of COD was found to be 93% for PVDF and 91% for PAN HF membranes whereas corresponding rejection of BOD was observed to be 92% and 86%. A two-dimensional comprehensive model was developed to predict the hydrodynamic profile inside the module. Regression analysis revealed that the simulation results agreed well with experimental data.

Study of surface morphology effects on Hg sorption-desorption kinetics on gold thin-films

Publisher: American Chemical Society (ACS)

Date: 11-01-2012

DOI: 10.1021/JP2091895

Catalytic oxidation and adsorption of elemental mercury over nanostructured CeO2-MnOxcatalyst

Publisher: Royal Society of Chemistry (RSC)

Date: 2015

DOI: 10.1039/C4RA16787B

Abstract: The presence of oxygen vacancies and synergetic interaction between Ce and Mn were responsible for superior Hg 0 oxidation performance of CeO 2 –MnO x compared to pure CeO 2 and MnO x .

Removal of mercury from an alumina refinery aqueous stream

Publisher: Elsevier BV

Date: 06-2007

DOI: 10.1016/J.JHAZMAT.2006.10.041

Abstract: Digestion condensate is formed as a by-product of the alumina refinery digestion process. The solution exhibits a high pH and is chemically reducing, containing many volatile species such as water, volatile organics, ammonia, and mercury. Because digestion condensate is chemically unique, an innovative approach was required to investigate mercury removal. The mercury capacity and adsorption kinetics were investigated using a number of materials including gold, silver and sulphur impregnated silica and a silver impregnated carbon. The results were compared to commercial sorbents, including extruded and powdered virgin activated carbons and a sulphur impregnated mineral. Nano-gold supported on silica (88% removal under batch conditions and 95% removal under flow conditions) and powdered activated carbon (91% under batch conditions and 98% removal under flow conditions) were the most effective materials investigated. The silver and sulphur impregnated materials were unstable in digestion condensate under the test conditions used.

The effect of thermal pre-treatment on the dissolution of chalcopyrite (CuFeS2) in sulfuric acid media

Publisher: Elsevier BV

Date: 05-2017

DOI: 10.1016/J.HYDROMET.2016.12.006

Uranium leaching from synthetic betafite: [(Ca,U)2(Ti,Nb,Ta)2O7]

Publisher: Elsevier BV

Date: 03-2017

DOI: 10.1016/J.MINPRO.2017.01.011

Characterisation and leaching studies on the uranium mineral betafite [(U,Ca)2(Nb,Ti,Ta)2O7]

Publisher: Elsevier BV

Date: 10-2015

DOI: 10.1016/J.MINENG.2015.07.007

Leaching behaviour of natural and heat-treated brannerite-containing uranium ores in sulphate solutions with iron(III)

Publisher: Elsevier BV

Date: 03-2014

DOI: 10.1016/J.MINENG.2013.12.007

High surface area Au–SBA-15 and Au–MCM-41 materials synthesis: Tryptophan amino acid mediated confinement of gold nanostructures within the mesoporous silica pore walls

Publisher: Elsevier BV

Date: 03-2013

DOI: 10.1016/J.JCIS.2012.12.008

Abstract: Advantages of confining the gold nanostructures formation within the mesoporous silica pore walls during its silica condensation and consequent improvement in the textural properties such as specific surface area, pore volume, pore diameter have been demonstrated, while retaining gold nanostructures within the silica walls. This has been achieved by tryptophan mediated confinement of gold nanoparticles formation within the condensing silica framework, to obtain Au-SBA-15 (SSA 1247 m(2)/g, V(t)~1.37 cm(3)/g) and Au-MCM-41 (SSA 1287 m(2)/g, V(t)~1.1 cm(3)/g), mesoporous silica materials having the combination of very high surface area from the porous support as well as gold nanoparticles infiltrated silica walls. Choice of tryptophan for this purpose is that it has an indole group, which was known to reduce gold ions to form gold nanoparticles and its amine and carboxylic acid groups, catalyze the hydrolysis of silica precursors in a wide range of pH. These properties have been utilized in restricting the gold nanostructures formation inside the condensing silica phase without affecting the self assembly between the silica precursors and the triblock copolymer (for SBA-15) or cetyltrimethylammonium bromide template (for MCM-41). The polytryptophan and the gold nanostructures, which were encapsulated within the silica framework and upon removal of the template by calcination resulting in the formation mesoporous materials wherein the silica walls become microporous due to the removal of occluded polytryptophan and the resulting microchannels contain very small gold nanostructures. Hence, the resulting materials have very high surface area, high pore volume and narrow pore size distribution as compared to their parent SBA-15, MCM-41 and SBA-15, MCM-41 post functionalized with gold nanoparticles inside the pores.

A study into the behaviour of nickel, cobalt and metal impurities during partial neutralisation of synthetic nickel laterite pressure leach solutions and pulps

Publisher: Elsevier BV

Date: 06-2021

DOI: 10.1016/J.HYDROMET.2021.105604

Catalytic wet oxidation of ferulic acid

Publisher: Inderscience Publishers

Date: 2008

DOI: 10.1504/IJETM.2008.017862

Leveraging Cu/CuFe2O4-Catalyzed Biomass-Derived Furfural Hydrodeoxygenation: A Nanoscale Metal–Organic-Framework Template Is the Prime Key

Publisher: American Chemical Society (ACS)

Date: 21-04-2020

DOI: 10.1021/ACSAMI.0C03683

An investigation into potential pathways for nickel and cobalt loss during impurity removal from synthetic nickel laterite pressure acid leach solutions via partial neutralisation

Publisher: Elsevier BV

Date: 06-2021

DOI: 10.1016/J.HYDROMET.2021.105595

{VOC} emission from alumina calcination stacks caused by thermal decomposition of organic additives

Publisher: Elsevier BV

Date: 03-2014

DOI: 10.1016/J.JECE.2013.11.002

Development of a new near infrared (NIR) tool for quantifying coffinite (USiO4) in a moderately complex uranium ore analogue

Publisher: Elsevier BV

Date: 11-2017

DOI: 10.1016/J.GEXPLO.2017.09.003

Design of novel ultrafiltration systems based on robust polyphenylsulfone hollow fiber membranes for treatment of contaminated surface water

Publisher: Elsevier BV

Date: 07-2014

DOI: 10.1016/J.CEJ.2014.02.087

Studies on the adsorption of phosphate using lanthanide functionalized KIT- 6

Publisher: Elsevier BV

Date: 09-2019

DOI: 10.1016/J.MICROMESO.2019.05.016

Geochemistry of Recent Brahmaputra River Sediments: Provenance, Tectonics, Source Area Weathering and Depositional Environment

Publisher: MDPI AG

Date: 15-09-2020

DOI: 10.3390/MIN10090813

Abstract: Sediments from stable sand bars along a 40 km section of the Brahmaputra River in northern Bangladesh were analyzed for their major, trace and rare earth element contents to determine their provenance, compositional maturity, source area weathering and tectonic setting. Geochemically, the sediments were classified as litharenites and the Index of Compositional Variability (ICV) varied between 1.4 and 2.0, indicating low compositional and mineralogical maturity. A high mean SiO2 concentration (72.9 wt.%) and low Al2O3 (11.1 wt.%) were consistent with a low abundance of shale and clay components. The depletion of the oxide components Na2O, CaO and K2O relative to average upper crustal compositions (UCC) reflected loss of feldspar during chemical weathering in the source region. Average TiO2 values for most s les were higher than average crustal levels, consistent with the northern section of the Brahmaputra River being a potential resource for valuable Fe-Ti oxide heavy minerals. Major and trace element ratios indicated the sediments represented erosional products from typical felsic upper continental crustal materials with contamination (30%–40%) from more intermediate/mafic compositions. The rare earth element patterns showed negative Eu anomalies (0.57–0.71), indicating they were derived mainly from fractionated felsic rocks. Resemblance of the sediment compositions to mean compositions from Higher Himalaya crystalline rocks pointed to these being potential source rocks but with components from a mafic source also present. Major element chemistries and low to intermediate weathering indices for all sediments indicated a lack of substantial chemical weathering. Evidence from tectonic discrimination diagrams suggested the Brahmaputra River sediments were derived from rock types that formed in a transitional tectonic setting ranging from an ancient passive margin to an active continental margin. Deposition occurred under cool to semi-arid climatic conditions in an oxic environment.

An investigation on the effects of Fe (Fe ^III, Fe ^II) and oxidation reduction potential on the dissolution of synthetic uraninite (UO 2)

Publisher: Elsevier BV

Date: 09-2011

DOI: 10.1016/J.HYDROMET.2011.06.005

Synthesis of very high surface area Au-SBA-15 materials by confinement of gold nanoparticles formation within silica pore walls

Publisher: Elsevier BV

Date: 07-2013

DOI: 10.1016/J.COLSURFA.2012.11.033

Characterisation of a uranium ore using multiple X-ray diffraction based methods

Publisher: Elsevier BV

Date: 08-2010

DOI: 10.1016/J.MINENG.2010.05.006

An investigation on the role of ytterbium in ytterbium promoted γ-alumina-supported nickel catalysts for dry reforming of methane

Publisher: Elsevier BV

Date: 11-2013

DOI: 10.1016/J.IJHYDENE.2013.08.040

Characterisation of a ferruginous rare earth bearing lateritic ore and implications for rare earth mineral processing

Publisher: Elsevier BV

Date: 04-2019

DOI: 10.1016/J.MINENG.2019.01.019

Promotional Effect of Cu and Influence of Surface Ni–Cu Alloy for Enhanced H₂ Yields from CH₄ Decomposition over Cu-Modified Ni Supported on MCM-41 Catalyst

Publisher: American Chemical Society (ACS)

Date: 13-02-2018

DOI: 10.1021/ACS.ENERGYFUELS.7B03363

CH₄ Cracking over the Cu–Ni/Al-MCM-41 Catalyst for the Simultaneous Production of H₂ and Highly Ordered Graphitic Carbon Nanofibers

Publisher: American Chemical Society (ACS)

Date: 18-11-2019

DOI: 10.1021/ACS.ENERGYFUELS.9B02819

An investigation on the influence of support type for Ni catalysed vapour phase hydrogenation of aqueous levulinic acid to γ-valerolactone

Publisher: Royal Society of Chemistry (RSC)

Date: 2016

DOI: 10.1039/C5RA24199E

Abstract: Product distribution is dependent on the nature and strength of the acid site in the vapour phase hydrogenation of levulinic acid.

Application of ferrous pyrometallurgy to the beneficiation of rare earth bearing iron ores – A review

Publisher: Elsevier BV

Date: 08-2017

DOI: 10.1016/J.MINENG.2017.04.005

Comparison of the chemistry and mineralogy of ilmenite concentrates sourced from fluvial (Brahmaputra River) and beach placer (Cox’s Bazar) deposits, Bangladesh

Publisher: Elsevier BV

Date: 02-2020

DOI: 10.1016/J.OREGEOREV.2019.103271

Ni/H-ZSM-5 as a stable and promising catalyst for CO_x free H₂ production by CH₄ decomposition

Publisher: Royal Society of Chemistry (RSC)

Date: 2016

DOI: 10.1039/C6RA03857C

Abstract: A relationship between Ni loading on H-ZSM-5 with (Si/Al = 150 mole ratio) against methane decomposition activity and Ni metal surface area is established.

Mercury diffusion in gold and silver thin film electrodes on quartz crystal microbalance sensors

Publisher: Elsevier BV

Date: 03-2009

DOI: 10.1016/J.SNB.2008.11.032

Chemical and microstructural characterisation studies on natural and heat treated brannerite samples

Publisher: Elsevier BV

Date: 12-2012

DOI: 10.1016/J.MINENG.2012.08.006

Gold coated nanostructured molybdenum oxide mercury vapour quartz crystal microbalance sensor

Publisher: American Scientific Publishers

Date: 02-2008

DOI: 10.1166/SL.2008.031

Nano size Hβ zeolite as an effective support for Ni and Ni Cu for CO x free hydrogen production by catalytic decomposition of methane

Publisher: Elsevier BV

Date: 11-2016

DOI: 10.1016/J.IJHYDENE.2016.09.131

Catalytic Wet Air Oxidation of Industrial Aqueous Streams

Publisher: Springer Science and Business Media LLC

Date: 14-07-2007

DOI: 10.1007/S10563-007-9020-6

Electro-deposition of gold nano-structures on gold Quartz Crystal Microbalance (QCM) electrodes for enhanced mercury vapour sensitivity in the presence of interferent gases

Publisher: IEEE

Date: 02-2008

DOI: 10.1109/ICONN.2008.4639248

Highly stable ytterbium promoted Ni/γ-Al2O3 catalysts for carbon dioxide reforming of methane

Publisher: Elsevier BV

Date: 05-2012

DOI: 10.1016/J.APCATB.2012.02.039

Ceria-zirconia modified MnOxcatalysts for gaseous elemental mercury oxidation and adsorption

Publisher: Royal Society of Chemistry (RSC)

Date: 2016

DOI: 10.1039/C5CY01534K

Abstract: The developed ceria–zirconia modified MnO x catalysts were found to exhibit enhanced Hg 0 oxidation and removal performance.

An investigation on the dissolution of synthetic brannerite (UTi 2O6)

Publisher: Elsevier BV

Date: 07-2013

DOI: 10.1016/J.HYDROMET.2013.06.017

Linkage Projects - Grant ID: LP130100991

Start Date: 02-2014

End Date: 06-2018

Amount: $615,000.00

Funder: Australian Research Council

Linkage Infrastructure, Equipment And Facilities - Grant ID: LE130100087

Start Date: 10-2013

End Date: 12-2013

Amount: $500,000.00

Funder: Australian Research Council

Linkage Infrastructure, Equipment And Facilities - Grant ID: LE110100174

Start Date: 12-2011

End Date: 12-2012

Amount: $800,000.00

Funder: Australian Research Council