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Dr Seher Ata

Conjoint Senior Lecturer

School of Architecture and Built Environment

Career Summary

Biography

Dr Seher Ata has been involved in all physical aspects of flotation both pulp and froth phase. Her PhD study was concerned with many complex mechanisms between the various phenomena occurring in the froth of a flotation system. Using artificially hydrophobised particles in the experimental work made a significant contribution to the understanding the froth phase behaviour and relevant mechanisms operating in the froth phase. In particular, it was shown that the collection of hydrophobic particles in the froth phase is possible and that there may be practical cases where it could be beneficial to feed particles into the froth rather than into the pulp, as is traditionally the case, particularly for the treatment of particles having difficulty in transferring from the pulp into the froth phase, such as large or weakly hydrophobic particles. As a result of this outcome, the recovery of coarse particles in the froth phase has been extended to industrial mineral flotation plants through a Linkage project where she is Chief investigator. She has been a research academic in the Centre for Multiphase Processes since 2002 and has been working on a number of projects including ultra-fine particle flotation, capture rate of hydrophobic particles in the froth phase, measurement of bubble sizes in industrial flotation cells and cluster formation in flotation cells. A remarkable discovery has been made during investigating the phenomena of cluster formation. It was found that bubbles in flotation cells form clusters and the size of them increases systematically with increases in the particle hydrophobicity. The cluster formation has not appeared in the literature before and its consequences in the flotation process are not known. Bubble clusters may be beneficial for the recovery of coarse particles which are poorly recovered by the existence flotation technologies. An experimental program has been taking to investigate the phenomena through an ARC Discovery grants where she is Chief Investigator. Dr Ata is chief investigator on two ARC projects (one ARC Linkage and one ARC DP) and two Independent Investigator Research Grants, a competitive external funding from the University of Newcastle.

Research Expertise
Recovery of hydrophobic particles in the froth phase Tracking of particles in the froth phase The formation of bubble clusters in flotation cells The behaviour of particles during coalescence of bubbles. 

Qualifications

  • PhD, University of Newcastle
  • Bachelor in Mining Engineering, Hacettepe University - Ankara - Turkey
  • Master in Mining Engineering, Hacettepe University - Ankara - Turkey

Keywords

  • Bubble coalescence
  • Bubble-particle interaction
  • Chemical Engineering
  • Flotation
  • Froth phase behaviour
  • Mineral processing,
  • Particle technology

Languages

  • Turkish (Fluent)

Fields of Research

Code Description Percentage
030699 Physical Chemistry not elsewhere classified 15
090499 Chemical Engineering not elsewhere classified 45
091499 Resources Engineering and Extractive Metallurgy not elsewhere classified 40

Professional Experience

UON Appointment

Title Organisation / Department

Academic appointment

Dates Title Organisation / Department
1/02/2002 -  Academic Research University of Newcastle
School of Engineering
Australia
1/01/1990 - 1/01/1993 Research Assistant Hacettepe University
Mining Engineering Department
Turkey
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Chapter (1 outputs)

Year Citation Altmetrics Link
2007 Jameson GJ, Nguyen AV, Ata S, 'The flotation of fine and coarse particles', Froth Flotation: A Century of Innovation, Society for Mining, Metallurgy, and Exploration, Englewood, Colorado 339-372 (2007) [B1]
Co-authors Graeme Jameson

Journal article (26 outputs)

Year Citation Altmetrics Link
2014 Morse AJ, Tan SY, Giakoumatos EC, Webber GB, Armes SP, Ata S, Wanless EJ, 'Arrested coalescence behaviour of giant Pickering droplets and colloidosomes stabilised by poly(tert-butylaminoethyl methacrylate) latexes.', Soft Matter, 10 5669-5681 (2014) [C1]
DOI 10.1039/c4sm00801d
Citations Scopus - 1Web of Science - 2
Co-authors Grant Webber, Erica Wanless
2014 Bournival G, Du Z, Ata S, Jameson GJ, 'Foaming and gas dispersion properties of non-ionic surfactants in the presence of an inorganic electrolyte', Chemical Engineering Science, 116 536-546 (2014) [C1]

Foams represent an important area of research due to their relevance in many industrial processes. Where there are geographical constraints, which can limit access to fresh water,... [more]

Foams represent an important area of research due to their relevance in many industrial processes. Where there are geographical constraints, which can limit access to fresh water, there is an economic incentive in using recycled water, bore water and even seawater for industrial purposes. This creates a growing interest in determining the effect of inorganic electrolytes on foaming and gas dispersion properties of non-ionic surfactant solutions. The present study compares the foaming and gas dispersion properties of the non-ionic surfactants 1-pentanol, tri(propylene glycol) methyl ether, and poly(propylene glycol) 425. For all surfactants, the stabilisation mechanism was influenced by the concentration of surfactant and the presence of salt with PPG being affected to a lesser extent. Sodium chloride was observed to have a detrimental effect on foaming at higher surfactant concentrations but improved foaming at low surfactant concentrations. At low surfactant concentrations, the addition of salt improved foaminess by dampening the hydrophobic force. An increase in gas holdup with increasing surfactant concentration was observed and was attributed to a decrease in bubble size. For poly(propylene glycol) an initial decrease in gas holdup was observed at very low concentrations. Salt mainly affected gas dispersion properties at a higher concentration. © 2014 Elsevier Ltd.

DOI 10.1016/j.ces.2014.05.011
Citations Scopus - 3Web of Science - 3
Co-authors Graeme Jameson
2014 Bournival G, Ata S, Karakashev SI, Jameson GJ, 'An investigation of bubble coalescence and post-rupture oscillation in non-ionic surfactant solutions using high-speed cinematography', JOURNAL OF COLLOID AND INTERFACE SCIENCE, 414 50-58 (2014) [C1]
DOI 10.1016/j.jcis.2013.09.050
Citations Scopus - 3Web of Science - 3
Co-authors Graeme Jameson
2014 Bournival G, Du Z, Ata S, Jameson GJ, 'Foaming and gas dispersion properties of non-ionic frothers in the presence of hydrophobized submicron particles', INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 133 123-131 (2014) [C1]
DOI 10.1016/j.minpro.2014.08.010
Citations Scopus - 2Web of Science - 1
Co-authors Graeme Jameson
2014 Bournival G, Ata S, Jameson GJ, 'The influence of submicron particles and salt on the recovery of coarse particles', Minerals Engineering, 69 146-153 (2014) [C1]

Coarse particles are more difficult to float. One of the factors that contributes to poor floatability is the stability of froth. The froth formed in industrial flotation cells is... [more]

Coarse particles are more difficult to float. One of the factors that contributes to poor floatability is the stability of froth. The froth formed in industrial flotation cells is typically not strong enough to provide adequate support for coarse and dense particles. The present study investigates how the presence of hydrophobic submicron particles at low concentration increases the recovery of relatively coarse particles through improvement in the froth stability. Silica particles with d80 of approximately 230 µm were floated in a laboratory mechanical flotation cell in a collector-free environment in the presence of poly(propylene glycol) 425 as a frothing agent. The hydrophobicity of the feed particles was modified through an esterification process with different alcohols ranging from 3 to 8 hydrocarbon groups to form a coating of intermediate hydrophobicity. Hydrophobised silica submicron particles of 300 nm in size were added to the flotation cell at 0.01 and 0.1 wt% concentration. The effect of electrolyte, sodium chloride, in the concentration range 10-5-10-1 M on the recovery of coarse particles was also investigated. For the feed employed, 1-butanol was found to provide relatively good flotation properties with a possibility for improvement by stabilising the froth phase. Both additives slightly stabilised the froth phase, which resulted in an increase in the maximum recovery of up to approximately 8%. It appeared that the additives had no significant effect on the first-order flotation rate constant.

DOI 10.1016/j.mineng.2014.07.003
Citations Scopus - 1Web of Science - 1
Co-authors Graeme Jameson
2013 Ang ZJ, Bournival G, Ata S, 'Influence of frothers on the detachment of galena particles from bubbles', International Journal of Mineral Processing, 121 59-64 (2013) [C1]
DOI 10.1016/j.minpro.2013.02.003
Citations Scopus - 3Web of Science - 3
2013 Ata S, Jameson GJ, 'Recovery of coarse particles in the froth phase - A case study', MINERALS ENGINEERING, 45 121-127 (2013) [C3]
DOI 10.1016/j.mineng.2013.02.006
Citations Scopus - 5Web of Science - 5
Co-authors Graeme Jameson
2013 Tan S-Y, Ata S, Wanless EJ, 'Direct Observation of Individual Particle Armored Bubble Interaction, Stability, and Coalescence Dynamics', JOURNAL OF PHYSICAL CHEMISTRY B, 117 8579-8588 (2013) [C1]
DOI 10.1021/jp402052f
Citations Scopus - 1Web of Science - 2
Co-authors Erica Wanless
2012 Maxwell RK, Ata S, Wanless EJ, Moreno-Atanasio R, 'Computer simulations of particle-bubble interactions and particle sliding using Discrete Element Method', Journal of Colloid and Interface Science, 381 1-10 (2012) [C1]
Citations Scopus - 5Web of Science - 4
Co-authors Erica Wanless, Roberto Moreno-Atanasio
2012 Ata S, 'Phenomena in the froth phase of flotation - A review', International Journal of Mineral Processing, 102-103 1-12 (2012) [C1]
Citations Scopus - 23Web of Science - 16
2012 Rahman RM, Ata S, Jameson GJ, 'The effect of flotation variables on the recovery of different particle size fractions in the froth and the pulp', International Journal of Mineral Processing, 106 70-77 (2012) [C1]
Citations Scopus - 19Web of Science - 13
Co-authors Graeme Jameson
2012 Thompson KL, Giakoumatos EC, Ata S, Webber GB, Armes SP, Wanless EJ, 'Direct observation of giant pickering emulsion and colloidosome droplet interaction and stability', Langmuir, 28 16501-16511 (2012) [C1]
Citations Scopus - 10Web of Science - 10
Co-authors Erica Wanless, Grant Webber
2012 Bournival G, Pugh R, Ata S, 'Examination of NaCl and MIBC as bubble coalescence inhibitor in relation to froth flotation', Minerals Engineering, 25 47-53 (2012) [C1]
Citations Scopus - 18Web of Science - 16
2011 Ata S, 'The role of frother on the detachment of particles from bubbles', Minerals Engineering, 24 476-478 (2011) [C1]
DOI 10.1016/j.mineng.2010.12.008
Citations Scopus - 7Web of Science - 6
2011 Ata S, Pugh RJ, Jameson GJ, 'The influence of interfacial ageing and temperature on the coalescence of oil droplets in water', Colloids and Surfaces A: Physicochemical and Engineering Aspects, 374 96-101 (2011) [C1]
DOI 10.1016/j.colsurfa.2010.11.012
Citations Scopus - 4Web of Science - 4
Co-authors Graeme Jameson
2010 Ata S, Davis ES, Dupin D, Armes SP, Wanless EJ, 'Direct observation of pH-induced coalescence of latex-stabilized bubbles using high-speed video imaging', Langmuir, 26 7865-7874 (2010) [C1]
DOI 10.1021/la904708x
Citations Scopus - 17Web of Science - 16
Co-authors Erica Wanless
2010 Bournival G, Ata S, 'Packing of particles on the surface of bubbles', Minerals Engineering, 23 111-116 (2010) [C1]
DOI 10.1016/j.mineng.2009.10.012
Citations Scopus - 13Web of Science - 13
2009 Ata S, 'The detachment of particles from coalescing bubble pairs', Journal of Colloid and Interface Science, 338 558-565 (2009) [C1]
DOI 10.1016/j.jcis.2009.07.003
Citations Scopus - 27Web of Science - 25
2009 Stevenson P, Ata S, Evans GM, 'The behavior of an oscillating particle attached to a gas-liquid surface', Industrial & Engineering Chemistry Research, 48 8024-8029 (2009) [C1]
DOI 10.1021/ie900085d
Citations Scopus - 6Web of Science - 6
Co-authors Geoffrey Evans
2008 Ata S, 'Coalescence of bubbles covered by particles', Langmuir, 24 6085-6091 (2008) [C1]
DOI 10.1021/la800466x
Citations Scopus - 31Web of Science - 30
2007 Stevenson P, Ata S, Evans GM, 'Convective-dispersive gangue transport in flotation froth', Chemical Engineering Science, 62 5736-5744 (2007) [C1]
DOI 10.1016/j.ces.2007.05.038
Citations Scopus - 12Web of Science - 9
Co-authors Geoffrey Evans
2006 Ata S, Pigram SM, Jameson GJ, 'Tracking of particles in the froth phase: An experimental technique', Minerals Engineering, 19 824-830 (2006) [C1]
DOI 10.1016/j.mineng.2005.09.051
Citations Scopus - 9Web of Science - 8
Co-authors Graeme Jameson
2006 Ata S, Yates PD, 'Stability and flotation behaviour of silica in the presence of a non-polar oil and cationic surfactant', Colloids and Surfaces A -Physicochemical and Engineering Aspects, 277 1-7 (2006) [C1]
DOI 10.1016/j.colsurfa.2005.10.062
Citations Scopus - 13Web of Science - 8
2004 Ata S, Ahmed N, Jameson GJ, 'The effect of hydrophobicity on the drainage of gangue minerals in flotation froths', Minerals Engineering, 17 897-901 (2004) [C1]
DOI 10.1016/j.mineng.2004.04.005
Citations Scopus - 30Web of Science - 23
Co-authors Graeme Jameson
2003 Ata S, Ahmed N, Jameson GJ, 'A Study of bubble Coalescence in Flotation Froths', International Journal of Mineral Processing, 72 255-266 (2003) [C1]
DOI 10.1016/S0301-7516(03)00103-0
Citations Scopus - 44Web of Science - 30
Co-authors Graeme Jameson
2002 Ata S, Ahmed N, Jameson GJ, 'Collection of hydrophobic particles in the froth phase', International Journal of Mineral Processing, 64 101-122 (2002) [C1]
Citations Scopus - 46Web of Science - 30
Co-authors Graeme Jameson
Show 23 more journal articles

Conference (16 outputs)

Year Citation Altmetrics Link
2014 Wanless EJ, Smith J, Bournival G, Tan SY, Webber GB, Ata S, 'High speed video observations of alumina-coated air bubble coalescence', Chemeca 2014: Processing excellence; Powering our future, Perth (2014) [E1]
Co-authors Grant Webber, Erica Wanless
2014 Morse AJ, Tan S-Y, Giakoumatos EC, Webber GB, Armes SP, Ata S, Wanless EJ, 'Coalescence behavior of giant Pickering droplets and colloidosomes stabilized by poly(tert-butylaminoethyl methacrylate) latexes', ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, San Francisco, CA (2014) [E3]
Co-authors Erica Wanless, Grant Webber
2012 Maxwell RK, Ata S, Wanless EJ, Moreno-Atanasio R, 'Computer simulations of particle-bubble interactions using Discrete Element Method', Chemeca 2012 : Quality of Life Through Chemical Engineering, Wellington, NZ (2012) [E1]
Co-authors Erica Wanless, Roberto Moreno-Atanasio
2012 Rahman RM, Ata S, Jameson GJ, 'Froth recovery measurements in an industrial flotation cell', 26th International Mineral Processing Congress, IMPC 2012: Innovative Processing for Sustainable Growth - Conference Proceedings, New Delhi, India (2012) [E1]
Citations Scopus - 3Web of Science - 2
Co-authors Graeme Jameson
2010 Chen Z, Ata S, Jameson GJ, 'Behaviour of bubble clusters in a turbulent flow', XXV International Mineral Processing Congress IMPC 2010,, Brisbane (2010) [E1]
Citations Scopus - 1
Co-authors Graeme Jameson
2010 Rahman R, Ata S, Jameson GJ, 'Development of a froth dropback measurement device', XXV International Mineral Processing Congress IMPC 2010,, Brisbane (2010) [E1]
Co-authors Graeme Jameson
2009 Pugh RJ, Ata S, 'Coalescence of bubbles and foaming in chemical surfactant free aqueous dispersions of mineral particles', 13th IACIS International Conference on Surface and Colloid Science and the 83rd ACS Colloid & Surface Science Symposium: Technical Program, New York, USA (2009) [E3]
2008 Ata S, Pugh RJ, Jameson GJ, 'The influence of coverage of particles on the coalescence of bubbles', 17th International Symposium on Surfactants in Solution. Abstracts, Berlin, Germany (2008) [E3]
Co-authors Graeme Jameson
2008 Ata S, Jameson GJ, 'Coalescence of bubble pairs in surfactant solutions', Proceedings of XXIV International Mineral Processing Congress, Beijing, China (2008) [E1]
Co-authors Graeme Jameson
2006 Ata S, Jameson GJ, 'Flotation of Dispersed Silica Particles', Proceedings of XXIII International Mineral Processing Congress, Istanbul, Turkey (2006) [E1]
Co-authors Graeme Jameson
2005 Ata S, Agarwal A, Jameson GJ, 'The Formation of Bubble Clusters in Flotation Cells - Effect of Impeller Speed', Centenary of Flotation Symposium, Brisbane (2005) [E1]
DOI 10.1016/j.minpro.2004.12.007
Citations Scopus - 32Web of Science - 22
Co-authors Graeme Jameson
2005 Ata S, Pigram SM, Jameson GJ, 'Tracking of Particles in the Froth Phase - An Experimental Technique', Centenary of Flotation Symposium, Brisbane (2005) [E1]
Co-authors Graeme Jameson
2003 Ata S, Ahmed N, Jameson GJ, 'Gangue Drainage in Flotation Froths', XXII International Mineral Processing Congress, Cape Town, South Africa (2003) [E1]
Co-authors Graeme Jameson
1999 Ata S, Ahmed N, 'The effect of hydrophobicity on the froth phase behaviour', 27th Australasian Chemical Engineering Conference, Newcastle (1999) [E1]
1998 Ata S, Ahmed N, 'Particle Shape Effects on Entrainment in Flotation', Proceedings of the 26th Australasian Chemical Engineering Conference, Port Douglas, Australia (1998) [E1]
1998 Ata S, Ahmed N, 'The Effect of Hydrophobic Particles on the Entrainment of Hydrophilic Particles', Proceedings of the 7th International Mineral Processing Symposium, Istanbul, Turkey (1998) [E2]
Show 13 more conferences
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Grants and Funding

Summary

Number of grants 11
Total funding $1,591,637

Click on a grant title below to expand the full details for that specific grant.


20122 grants / $330,000

Particle-Stabilised Bubble and Droplet Interfaces$315,000

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Professor Erica Wanless, Doctor Seher Ata
Scheme Discovery Projects
Role Investigator
Funding Start 2012
Funding Finish 2012
GNo G1100202
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

2011 Emerging Research Leaders Program$15,000

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Doctor Seher Ata
Scheme Emerging Research Leaders Program
Role Lead
Funding Start 2012
Funding Finish 2012
GNo G1200512
Type Of Funding Internal
Category INTE
UON Y

20111 grants / $25,000

Improving the recovery of coarse particles in flotation$25,000

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Laureate Professor Graeme Jameson, Doctor Seher Ata
Scheme Near Miss Grant
Role Investigator
Funding Start 2011
Funding Finish 2011
GNo G1001040
Type Of Funding Internal
Category INTE
UON Y

20101 grants / $17,000

The influence of frother types on sulphide minerals flotation $17,000

Funding body: University of Newcastle - Faculty of Engineering & Built Environment

Funding body University of Newcastle - Faculty of Engineering & Built Environment
Project Team Doctor Seher Ata
Scheme Pilot Grant
Role Lead
Funding Start 2010
Funding Finish 2010
GNo G0900064
Type Of Funding Internal
Category INTE
UON Y

20081 grants / $1,700

XXIV International Mineral Processing Congress, Beijing, China, 24/9/2008 - 28/9/2008$1,700

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Doctor Seher Ata
Scheme Travel Grant
Role Lead
Funding Start 2008
Funding Finish 2008
GNo G0189318
Type Of Funding Internal
Category INTE
UON Y

20072 grants / $9,700

Investigation of bubble clusters in froth flotation$8,000

Funding body: NEWCASTLE UNIVERSITY

Funding body NEWCASTLE UNIVERSITY
Project Team
Scheme INDEPENDENT INVESTIGATOR GRANT
Role Lead
Funding Start 2007
Funding Finish 2007
GNo
Type Of Funding Internal
Category INTE
UON Y

Flotation 07, Cape Town, South Africa, 6/11/2007 - 9/11/2007$1,700

Funding body: University of Newcastle

Funding body University of Newcastle
Project Team Doctor Seher Ata
Scheme Travel Grant
Role Lead
Funding Start 2007
Funding Finish 2007
GNo G0188070
Type Of Funding Internal
Category INTE
UON Y

20063 grants / $958,509

Extending the range of the flotation process for particle separation$950,000

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Laureate Professor Graeme Jameson, Doctor Seher Ata
Scheme Discovery Projects
Role Investigator
Funding Start 2006
Funding Finish 2006
GNo G0185241
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

Behaviour of particles during coalescence of bubbles$5,909

Funding body: NEWCASTLE UNIVERSITY

Funding body NEWCASTLE UNIVERSITY
Project Team
Scheme INDEPENDENT INVESTIGATOR GRANT
Role Lead
Funding Start 2006
Funding Finish 2006
GNo
Type Of Funding Internal
Category INTE
UON Y

Floatation of Dispersed Fine Silica Particles$2,600

Funding body: Ian Potter Foundation

Funding body Ian Potter Foundation
Project Team Doctor Seher Ata
Scheme Travel Grant
Role Lead
Funding Start 2006
Funding Finish 2006
GNo G0186580
Type Of Funding Donation - Aust Non Government
Category 3AFD
UON Y

20051 grants / $249,728

Mineral Flotation - Integrating Science and Practice$249,728

Funding body: ARC (Australian Research Council)

Funding body ARC (Australian Research Council)
Project Team Laureate Professor Graeme Jameson, Doctor Seher Ata
Scheme Linkage Projects
Role Investigator
Funding Start 2005
Funding Finish 2005
GNo G0185579
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y
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Research Supervision

Number of supervisions

Completed5
Current0

Past Supervision

Year Level of Study Research Title / Program / Supervisor Type
2015 PhD Stabilisation of Bubbles and Froths with Colloidal Particles and Inorganic Electrolytes
Chemical Engineering, Faculty of Engineering and Built Environment, The University of Newcastle
Principal Supervisor
2014 PhD Behaviour of Bubble Clusters in a Turbulent Flotation Cell
Chemical Engineering, Faculty of Engineering and Built Environment, The University of Newcastle
Co-Supervisor
2014 PhD Studies of Froth Recovery in Flotation
Chemical Engineering, Faculty of Engineering and Built Environment, The University of Newcastle
Co-Supervisor
2013 PhD Detachment of Particles From Bubbles in a Turbulent Motion
Chemical Engineering, Faculty of Engineering and Built Environment, The University of Newcastle
Co-Supervisor
2013 PhD The Attachment of Bubbles to Composite Particles
Chemical Engineering, Faculty of Engineering and Built Environment, The University of Newcastle
Co-Supervisor
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Dr Seher Ata

Position

Conjoint Senior Lecturer
Centre for Multiphase Processes
School of Architecture and Built Environment
Faculty of Engineering and Built Environment

Contact Details

Email seher.ata@newcastle.edu.au
Phone (02) 4921 5881
Fax (02) 4960 1445

Office

Room EB120
Building Engineering B
Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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