Imperial College London
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DrKathrynHadler

Faculty of Engineering, Department of Earth Science & Engineering

Honorary Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 6510k.hadler

 
 
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Location

 

2.60Aston WebbSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Owens:2018:10.1016/j.cis.2018.04.009,
author = {Owens, CL and Nash, GR and Hadler, K and Fitzpatrick, RS and Anderson, CG and Wall, F},
doi = {10.1016/j.cis.2018.04.009},
journal = {Advances in Colloid and Interface Science},
pages = {152--162},
title = {Zeta potentials of the rare earth element fluorcarbonate minerals focusing on bastnäsite and parisite},
url = {http://dx.doi.org/10.1016/j.cis.2018.04.009},
volume = {256},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Rare earth elements (REE) are critical to a wide range of technologies ranging from mobile phones to wind turbines. Processing and extraction of REE minerals from ore bodies is, however, both challenging and relatively poorly understood, as the majority of deposits contain only limited enrichment of REEs. An improved understanding of the surface properties of the minerals is important in informing and optimising their processing, in particular for separation by froth flotation. The measurement of zeta potential can be used to extract information regarding the electrical double layer, and hence surface properties of these minerals. There are over 34 REE fluorcarbonate minerals currently identified, however bastnäsite, synchysite and parisite are of most economic importance. Bastnäsite-(Ce), the most common REE fluorcarbonate, supplies over 50% of the world's REE. Previous studies of bastnäsite have showed a wide range of surface behaviour, with the iso-electric point (IEP), being measured between pH values of 4.6 and 9.3. In contrast, no values of IEP have been reported for parisite or synchysite. In this work, we review previous studies of the zeta potentials of bastnäsite to investigate the effects of different methodologies and sample preparation. In addition, measurements of zeta potentials of parisite under water, collector and supernatant conditions were conducted, the first to be reported. These results showed an iso-electric point for parisite of 5.6 under water, with a shift to a more negative zeta potential with both collector (hydroxamic and fatty acids) and supernatant conditions. The IEP with collectors and supernatant was <3.5. As zeta potential measurements in the presence of reagents and supernatants are the most rigorous way of determining the efficiency of a flotation reagent, the agreement between parisite zeta potentials obtained here and previous work on bastnäsite suggests that parisite may be processed using similar
AU  - Owens,CL
AU  - Nash,GR
AU  - Hadler,K
AU  - Fitzpatrick,RS
AU  - Anderson,CG
AU  - Wall,F
DO  - 10.1016/j.cis.2018.04.009
EP  - 162
PY  - 2018///
SN  - 0001-8686
SP  - 152
TI  - Zeta potentials of the rare earth element fluorcarbonate minerals focusing on bastnäsite and parisite
T2  - Advances in Colloid and Interface Science
UR  - http://dx.doi.org/10.1016/j.cis.2018.04.009
UR  - https://www.ncbi.nlm.nih.gov/pubmed/29724405
UR  - http://hdl.handle.net/10044/1/60932
VL  - 256
ER  -
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