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Professor Yee-Kwong Leong

Energy, UWA Centre for

Contact details
UWA Centre for Energy
The University of Western Australia (M050)
35 Stirling Highway
+61 8 6488 3602
+61 8 6488 1024

Mechanical and Chemical Engineering, School of

Contact details
School of Mechanical and Chemical Engineering
The University of Western Australia (M050)
35 Stirling Highway
+61 8 6488 3602
+61 8 6488 1024
BAppSci Sci.U.Malaysia, PhD Melb., FIEAust., Sr MAIChE, MAusIMM
I obtained my Bachelor from the Universiti Sains Malaysia and a PhD from the University of Melbourne in 1989. I have over 110 journal publications and more than 50 refereed conference publications. I received more than 2000 citations and a H-index of 24. Some my research works and data were reproduced in two very well-regarded chemical Engineering Textbook; Rheology and Structure of Complex Fluids (1999) and Colloidal Suspension Rheology (2012).
Key research
Surface Chemistry/force and Rheology of Suspension: Control of suspension processing behaviour;
Microstructure and Rheology of clay and oxide suspensions;
Ageing and Microstructure of Swelling Clay Suspensions - Thickening of low density suspensions;
Coal and biochar slurry fuel preparation;
Experiment and Population balance modelling of flocculation and flocs fragmentation.
Publications on Clay Suspension Rheology and Surface Chemistry:
1.Teh EJ, Leong YK, Liu Y, Fourie AB, Fahey M, Differences in the rheology and surface chemistry of kaolin clay slurries: the source of the variations, Chem Eng Sci., 64 (2009) 3817-3825.

2.Teo J, Liew WK, Leong YK, Clay, phosphate adsorption, dispersion and rheology, Water, Air, & Soil Pollution: Focus, 9 (2009) 403-407.

3.Wickramasinghe SR, Leong YK, Mondal S, Liow JL, Influence of Cationic Flocculant Properties on the Flocculation of Yeast Suspensions, Adv. Powder Tech., 21 (2010) 374-379.

4.Shanker P, Teo, J, Leong YK, Fourie AB, Fahey M, Adsorbed Phosphate Additives for Interrogating the Nature of Interparticles Forces in Kaolin Clay slurries via Rheological Yield Stress, Adv. Powder Tech., 21 (2010) 380-385.

5.Goh R., Leong YK, Lehane B, Bentonite Slurries: Zeta Potential, Yield Stress, Adsorbed Additive and Time-dependent Behaviour, Rheol Acta, 50 (2011) 29-38.

6.Yap J, Leong YK, Liu JS., Structural recovery behaviour of barite-loaded bentonite drilling muds, J. Pet. Sci. Eng. 78 (2011) 552-558.

7.Lee EJ, Stefanus C, Leong YK, Structural recovery behaviour of kaolin, bentonite and K-montmorillonite slurries. Powder Technology 223 (2012) 105-109.

8.Leong YK, Teo J, Teh EJ, Smith J, Widjaja J, Lee JX, Fourie A, Fahey M, Chen R. Controlling attractive interparticle forces via small anionic and cationic additives in kaolin clay slurries. Chem Eng Res Design. 90 (2012) 658-666.

9.Mondal S, Leong YK, Liow JL, Wickramasinghe SR. Flocculation of yeast suspension by a cationic flocculant, Powder Tech. 235 (2013) 426-430.

10.Au PI, Leong YK, Rheological and zeta potential behaviour of kaolin and bentonite composite slurries, Colloids Surface A: Physicochem. Eng. Aspects, 436 (2013) 530-541.

11.Chang WZ, Leong YK, Ageing and Collapse of Bentonite Gels– Effects of Li, Na, K and Cs ions, Rheol. Acta. 53 (2014) 109-122.

12.Avadiar L, Leong YK, Fourie A, Effects of polyethylenimine dosages and molecular weights on flocculation, rheology and consolidation behaviors of kaolin slurries, Powder Tech. 254 (2014) 364-372

13.Au PI, Siow SY, Avadiar L, Lee EM, Leong YK, Muscovite Mica and koalin Slurries: yield stress-volume fraction and Deflocculation point zeta potential Comparison, Powder Tech., 262 (2014) 124-130.

14.Avadiar L, Leong YK, Fourie A, Nugraha T, Clode PL, Source of Unimin kaolin rheological variation - Ca2+ concentration: Colloids Surfaces A: Physicochem. Eng. Aspects 459 (2014) 90-99.

15.Sehly K, Chiew HL, Li H, Song A, Leong YK, Huang W, Stability and ageing behaviour and the formulation of Potassium-based mud. App Clay Sci., 104 (2015) 309–317.

16.Avadiar L, Leong YK, Fourie A, Physicochemical behaviors of kaolin slurries with and without cations—Contributions of alumina and silica sheets, Colloids Surfaces A: Physicochem. Eng. Aspects 468 (2015) 103–113.

17.Au P.I. and Leong Y.K., Surface chemistry and rheology of Laponite dispersions-Zeta potential, yield stress, ageing, fractal dimension and pyrophosphate, App Clay Sci., 107 (2015) 36-45.

18.Au PI and Leong YK, Fragmentation of polymer-bridged silica flocs by high shear impact: experiment and population balance modelling, Asia-Pac. J. Chem Eng, 10 (2015) 542-555 (Chemeca 2014 Special Issue)

19.Huang W, Zhao C, Qiu Z, Leong YK, Zhong H and Cao J, Synthesis, characterization and evaluation of a quadripolymer with low molecular weight as a water based drilling fluid viscosity reducer at high temperature (245 ∘C), Polymer Int. 64 (2015) 1352-1360.

20.Au PI, Pillai P, Leong YK, Ageing and collapse of bentonite gels - effects of Mg(II), Ca(II) and Ba(II) ions, App. Clay Sci. 114 (2015) 141-150.

21.Au PI, Hassan S., Liu JS, Leong YK, Behaviour of laponite gels: Rheology, ageing, pH effect and phase state in the presence of dispersant, Chem. Eng. Res. Design 101 (2015) 65–73.

22.Au PI, Clode P, Smart R St C, Leong YK. Surface chemistry–microstructure–rheology of high and lowcrystallinity KGa-1b and KGa-2 kaolinite suspensions, Colloids Surfaces A: Physicochem. Eng. Aspects 484 (2015) 354–364.

23.Huang W, Wang Y, Qiu Z, Leong YK, Cui M, Zhong H, Synthesis and characterisation of strong hydrophobic bentonite, Materials Research Innovations,19 (2015) 428-434.

24.Au PI, Leong YK, Surface chemistry and rheology of slurries of kaolinite and montmorillonite from different sources, KONA powder particle Journal, 33 (2016) 17-32.
Roles, responsibilities and expertise
I have responsibilities in teaching, research, supervision of master and PhD students, provide consultation service to industry and source research project funding. I have extensive experience solving suspension processing and rheological problems. I can also provide non-Newtonian correction to the shear stress-shear rate data for complex fluids such as yield stress suspension characterised in concentric cylinder and parallel plate geometry.
Future research
Structure and rheology of swelling clay suspensions; Chemistry of rare earth oxide extraction.
Funding received
I have received ARC Linkage, Discovery and LIEF grants over the past 20 years. I have also received funding from industry such as OSD pty ltd, Active Minerals Inc, QNI, WMC Fertilizers, Zinifex Century and a few others
Industrial relevance
My research generates new fundamental and applied knowledge that can be used to solve industrial suspension problems in rheology, thickening and consolidation, flotation and other hydrometallurgical processes. Clay suspension processing problems are of particular interest to me. Over the past 10 years, I have conducted extensive research on surface chemistry, rheology, microstructure and ageing properties of a range of clays such as kaolin, bentonite, sodium and calcium montmorillonite and Laponite.
English, Bahasa and Chinese dialect
Snr Member AIChE
I am currently teaching:
CHPR4406: Reaction Engineering
CHPR4405: Particle Mechanics and Solids Handling
Research profile
Research profile and publications

The University of Western Australia

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Last updated:
Tuesday, 3 November, 2015 2:39 PM