Ralph, David - Murdoch University - School of Engineering and Information Technology

研究领域

Early research interests included the chemistry of natural products. My doctoral studies changed the emphasis somewhat and I became interested in waste treatment and the recycling of the ‘nutrient elements’ carbon, nitorgen and phosphorous. The foundations of waste treatment and recycling are the anabolic and catabolic activities of micro-organisms and I soon learned the fact that these little ‘microbes’ run the whole system that we live and depend upon. Since discovering the lithotrophic lifestyle in the early 1990′s, ie. cells that are the ‘rock-eaters’, most of my research has been focussed on their activities and what controls those activities.

近期论文

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Uddin, K., Ralph, D., Henry, D., (2015), Mechanistic investigation of halopentaaquachromium (III) complexes: Comparison of computational and experimental results, Computational and Theoretical Chemistry, 1070, 2015, pages 152 - 161. Mullett, M., Fornarelli, R., Ralph, D., (2014), Nanofiltration of mine water: Impact of feed pH and membrane charge on resource recovery and water discharge, Membranes, 4, , pages 163 - 180. Minakshi Sundaram, M., Ralph, D., Singh, P., Yin, C., (2014), New Insights into the Electrochemical Behavior of Hematite (a-Fe2O3) Microparticles in Strong Aqueous Basic Electrolyte: Formation of Metallic Iron, Metallurgical and Materials Transactions A - Physical Metallurgy and Materials Science, 45A, , pages 2023 - 2029. Shiers, D., Ralph, D., Watling, H., (2014), The effects of nitrate on substrate utilisation by some iron(II)- and sulfur-oxidising Bacteria and Archaea, Hydrometallurgy, 150, , pages 259 - 268. Shiers, D., Ralph, D., Bryan, C., Watling, H., (2013), Substrate utilisation by Acidianus brierleyi, Metallosphaera hakonensis and Sulfolobus metallicus in mixed ferrous ion and tetrathionate growth media, Minerals Engineering, 48, , pages 86 - 93. Minakshi Sundaram, M., Ralph, D., (2013), A Novel Sodium-Ion Rechargeable Battery, ECS Transactions, 45, 29, pages 95 - 102. Minakshi Sundaram, M., Singh, P., Ralph, D., Appadoo, D., Blackford, M., Ionescu, M., (2012), Structural characteristics of olivine Li(Mg0.5Ni0.5)PO4 via TEM analysis, Ionics: international journal of ionics, 18, 6, pages 583 - 590. Blight, K., Candy, R., Menzel, M., Ralph, D., (2012), Total dissolved solids and their effects on iron oxidation by chemolithotrophic cells, Hydrometallurgy, 125-126, , pages 109 - 114. Yin, C., Minakshi Sundaram, M., Ralph, D., Jiang, Z., Xie, Z., Guo, H., (2011), Hydrothermal synthesis of cubic -Fe2O3 microparticles using glycine: Surface characterization, reaction mechanism and electrochemical activity, Journal of Alloys and Compounds, 509, 41, pages 9821 - 9825. Minakshi Sundaram, M., Sharma, N., Ralph, D., Appadoo, D., Nallathamby, K., (2011), Synthesis and characterization of Li(Co0.5Ni0.5) PO4 cathode for li-ion aqueous battery applications, Electrochemical and Solid-State Letters, 14, 6, pages A86 - A89. Shiers, D., Ralph, D., Watling, H., (2011), Batch culture of Acidithiobacillus caldus on tetrathionate, Biochemical Engineering Journal, 54, 3, pages 185 - 191. Shiers, D., Ralph, D., Watling, H., (2010), A comparative study of substrate utilisation by Sulfobacillus species in mixed ferrous ion and tetrathionate growth medium, Hydrometallurgy, 104, 3-4, pages 363 - 369. Watling, H., Watkin, E., Ralph, D., (2010), The resilience and versatility of acidophiles that contribute to the bio-assisted extraction of metals from mineral sulphides, Environmental Technology, 31, 8-9, pages 915 - 933. Blight, K., Candy, R., Ralph, D., (2009), The preferential oxidation of orthorhombic sulfur during batch culture, Hydrometallurgy, 99, 2009, pages 100 - 104. Kim, D., Mishra, D., Ahn, J., Chaudhury, G., Ralph, D., (2009), A novel process to treat spent petroleum catalyst using sulfur-oxidsing lithotrophs, Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering, 44, 14, pages 1585 - 1591. Candy, R., Blight, K., Ralph, D., (2009), Specific iron oxidation and cell growth rates of bacteria in batch culture, Hydrometallurgy, 98, 2009, pages 148 - 155. Mishra, D., Ahn, J., Kim, D., Chaudhury, G., Ralph, D., (2009), Dissolution kinetics of spent petroleum catalyst using sulfur oxidising acidophilic microorganisms, Journal of Hazardous Materials, 167, , pages 1231 - 1236. Kim, D., Mishra, D., Park, K., Ahn, J., Ralph, D., (2008), Metal Leaching from Spent Petroleum Catalyst by Acidophilic Bacteria in Presence of Pyrite, Materials Transactions, 49, 10, pages 2383 - 2388. Blight, K., Ralph, D., (2008), Aluminium sulphate and potassium nitrate effects on batch culture ofiron oxidising bacteria, Hydrometallurgy, 92, 3-4, pages 130 - 134. Mishra, D., Kim, D., Ralph, D., Ahn, J., Rhee, Y., (2008), Bioleaching of spent hydro-processing catalyst using acidophilic bacteria and its kinetics aspect, Journal of Hazardous Materials, 152, , pages 1082 - 1091.