Valix, Marjorie - University of Sydney - School of Chemical and Biomolecular Engineering

研究领域

Corrosion caused by acid-generating micro-organisms causes millions of dollars worth of damage to infrastructure every year. Associate Professor Marjorie Valix is researching this natural process with a view to mitigating its effects - and harnessing it for more constructive purposes. "Certain micro-organisms can generate destructive acids that attack particular materials and cause damaging and costly corrosion. In Australia alone, our water authorities spend more than $100 million each year tackling this issue. "Developing our understanding of microbially induced corrosion can help us to prevent or slow it, through such means as using protective coatings to hinder its progress. "But this same destructive process also has great constructive potential, such as in the processing of minerals and the management of waste. "The challenges involved in extracting useful minerals from ores - and, interestingly, also in the management of waste - include the presence of other less valued materials, high processing costs, and environmental considerations. Understanding and harnessing the natural ability of micro-organisms to break down certain materials therefore has huge potential in addressing these issues in a cost-effective and ecologically sensitive manner. "Unlike chemicals, micro-organisms can be 'trained' to tolerate toxic environments and to generate specific enzymes that catalyse degradation of certain materials. Learning how to harness this behaviour is exciting. "I have been working in this field since 1998. Being at the University of Sydney is very conducive to my research, because of its world-leading facilities and researchers."

近期论文

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Nazemi, M., Valix, M. (2016). Evaluation of acid diffusion behaviour of amine-cured epoxy coatings by accelerated permeation testing method and prediction of their service life. Progress in Organic Coatings, 97, 307-312. [More Information] Valix, M. (2015). Analysis of acid transport through multi-phase epoxy mortars for wastewater structures. Water Science and Technology, 72(2), 332-337. [More Information] Valix, M., Shanmugarajah, K. (2015). Biogenic acids produced on epoxy linings installed in sewer crown and tidal zones. Water Research, 80, 217-226. [More Information] Hong, Y., Valix, M. (2014). Bioleaching of electronic waste using acidophilic sulfur oxidising bacteria. Journal of Cleaner Production, 65, 465-472. [More Information] Chan, O., Valix, M. (2014). Thermogravimetric analysis and kinetic study of biochemically pretreated printed circuit board wastes. Waste and Biomass Valorization, 5(2), 211-222. [More Information] Murayama, N., Baba, M., Hayashi, J., Shibata, J., Valix, M. (2013). Adsorption Property of Water Vapor on ALPO4-5 Synthesized From Aluminum Dross. Materials Transactions, 54(12), 2265-2270. [More Information] Saidan, M., Brown, B., Valix, M. (2012). Leaching of electronic waste using biometabolised acids. Chinese Journal of Chemical Engineering, 20(3), 530-534. [More Information] Valix, M., Zamri, D., Mineyama, H., Cheung, A., Shi, J., Bustamante, H. (2012). Microbiologically induced corrosion of concrete and protective coatings in gravity sewers. Chinese Journal of Chemical Engineering, 20(3), 433-438. [More Information] Murayama, N., Maekawa, I., Ushiro, H., Miyoshi, T., Shibata, J., Valix, M. (2012). Synthesis of various layered double hydroxides using aluminum dross generated in aluminum recycling process. International Journal of Mineral Processing, 110 - 111(18 July 2012), 46-52. [More Information] Ge, W., Zamri, D., Mineyama, H., Valix, M. (2011). Bioaccumulation of heavy metals on adapted Aspergillus foetidus. Adsorption, 17(5), 901-910. [More Information] Valix, M., Mineyama, H., Chen, C., Cheung, A., Shi, J., Bustamante, H. (2011). Effect of film thickness and filler properties on sulphuric acid permeation in various commercially available epoxy mortar coatings. Water Science and Technology, 64(9), 1864-1869. [More Information] Mui, E., Cheung, A., Valix, M., McKay, G. (2010). Activated carbons from bamboo scaffolding using acid activation. Separation and Purification Technology, 74(2), 213-218. [More Information] Mui, E., Cheung, A., Valix, M., McKay, G. (2010). Dye adsorption onto activated carbons from tyre rubber waste using surface coverage analysis. Journal of Colloid and Interface Science, 347(2), 290-300. [More Information] Mui, E., Cheung, A., Valix, M., McKay, G. (2010). Dye adsorption onto char from bamboo. Journal of Hazardous Materials, 177(1-3), 1001-1005. [More Information] Mui, E., Cheung, A., Valix, M., McKay, G. (2010). Mesoporous activated carbon from waste tyre rubber for dye removal from effluents. Microporous and Mesoporous Materials, 130(1-3), 287-294. [More Information] Eu, W., Cheung, A., Valix, M. (2009). Design and application of a high-temperature microfurnace for an in situ X-ray diffraction study of phase transformation. Journal of Synchrotron Radiation, 16(6), 842-848. [More Information] Tang, J., Valix, M. (2009). Leaching kinetics of limonite and nontronite ores. International Journal of Environment and Waste Management (IJEWM), 3(3/4), 244-252. [More Information] Valix, M., Cheung, A., McKay, G. (2009). Sulfur Fixation on Bagasse Activated Carbon by Chemical Treatment and its Effect on Acid Dye Adsorption. Adsorption, 15, 453-459. [More Information] Valix, M., Thangavelu, V., Ryan, D., Tang, J. (2009). Using halotolerant Aspergillus foetidus in bioleaching nickel laterite ore. International Journal of Environment and Waste Management (IJEWM), 3(3/4), 253-264. [More Information] Deepatana, A., Valix, M. (2008). Comparative adsorption isotherms and modeling of nickel and cobalt citrate complexes onto chelating resins. Desalination, 218(1-3), 334-342. [More Information]