Chemical fractionation and speciation modelling for optimization of ion-exchange processes to recover palladium from industrial wastewater
- Author
- Karel Folens (UGent) , Stijn Van Hulle (UGent) , Frank Vanhaecke (UGent) and Gijs Du Laing (UGent)
- Organization
- Abstract
- Palladium is used in several industrial applications and, given its high intrinsic value, intense efforts are made to recover the element. In this hydrometallurgic perspective, ion-exchange (IEX) technologies are principal means. Yet, without incorporating the chemical and physical properties of the Pd present in real, plant-specific conditions, the recovery cannot reach its technical nor economic optimum. This study characterized a relevant Pd-containingwaste stream of a mirror manufacturer to provide input for a speciation model, predicting the Pd speciation as a function of pH and chloride concentration. Besides the administered neutral PdCl2 form, both positively and negatively charged [PdCln](2-n) species occur depending on the chloride concentration in solution. Purolite C100 and Relite 2AS IEX resins were selected and applied in combination with other treatment steps to optimize the Pd recovery. A combination of the cation and anion exchange resins was found successful to quantitatively recover Pd. Given the fact that Pd was also primarily associated with particles, laboratory-scale experiments focused on physical removal of the Pd-containing flow were conducted, which showed that particle-bound Pd can already be removed by physical pre-treatment prior to IEX, while the ionic fraction remains fully susceptible to the IEX mechanism.
- Keywords
- recovery, wastewater, speciation, palladium, PLATINUM, modelling, ion-exchange, NANOPARTICLES, SPECTROMETRY, SEPARATION, STABILITY, RHODIUM
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-7250382
- MLA
- Folens, Karel, et al. “Chemical Fractionation and Speciation Modelling for Optimization of Ion-Exchange Processes to Recover Palladium from Industrial Wastewater.” WATER SCIENCE AND TECHNOLOGY, vol. 73, no. 7, 2016, pp. 1738–45, doi:10.2166/wst.2016.007.
- APA
- Folens, K., Van Hulle, S., Vanhaecke, F., & Du Laing, G. (2016). Chemical fractionation and speciation modelling for optimization of ion-exchange processes to recover palladium from industrial wastewater. WATER SCIENCE AND TECHNOLOGY, 73(7), 1738–1745. https://doi.org/10.2166/wst.2016.007
- Chicago author-date
- Folens, Karel, Stijn Van Hulle, Frank Vanhaecke, and Gijs Du Laing. 2016. “Chemical Fractionation and Speciation Modelling for Optimization of Ion-Exchange Processes to Recover Palladium from Industrial Wastewater.” WATER SCIENCE AND TECHNOLOGY 73 (7): 1738–45. https://doi.org/10.2166/wst.2016.007.
- Chicago author-date (all authors)
- Folens, Karel, Stijn Van Hulle, Frank Vanhaecke, and Gijs Du Laing. 2016. “Chemical Fractionation and Speciation Modelling for Optimization of Ion-Exchange Processes to Recover Palladium from Industrial Wastewater.” WATER SCIENCE AND TECHNOLOGY 73 (7): 1738–1745. doi:10.2166/wst.2016.007.
- Vancouver
- 1.Folens K, Van Hulle S, Vanhaecke F, Du Laing G. Chemical fractionation and speciation modelling for optimization of ion-exchange processes to recover palladium from industrial wastewater. WATER SCIENCE AND TECHNOLOGY. 2016;73(7):1738–45.
- IEEE
- [1]K. Folens, S. Van Hulle, F. Vanhaecke, and G. Du Laing, “Chemical fractionation and speciation modelling for optimization of ion-exchange processes to recover palladium from industrial wastewater,” WATER SCIENCE AND TECHNOLOGY, vol. 73, no. 7, pp. 1738–1745, 2016.
@article{7250382,
abstract = {{Palladium is used in several industrial applications and, given its high intrinsic value, intense efforts are made to recover the element. In this hydrometallurgic perspective, ion-exchange (IEX) technologies are principal means. Yet, without incorporating the chemical and physical properties of the Pd present in real, plant-specific conditions, the recovery cannot reach its technical nor economic optimum. This study characterized a relevant Pd-containingwaste stream of a mirror manufacturer to provide input for a speciation model, predicting the Pd speciation as a function of pH and chloride concentration. Besides the administered neutral PdCl2 form, both positively and negatively charged [PdCln](2-n) species occur depending on the chloride concentration in solution. Purolite C100 and Relite 2AS IEX resins were selected and applied in combination with other treatment steps to optimize the Pd recovery. A combination of the cation and anion exchange resins was found successful to quantitatively recover Pd. Given the fact that Pd was also primarily associated with particles, laboratory-scale experiments focused on physical removal of the Pd-containing flow were conducted, which showed that particle-bound Pd can already be removed by physical pre-treatment prior to IEX, while the ionic fraction remains fully susceptible to the IEX mechanism.}},
author = {{Folens, Karel and Van Hulle, Stijn and Vanhaecke, Frank and Du Laing, Gijs}},
issn = {{0273-1223}},
journal = {{WATER SCIENCE AND TECHNOLOGY}},
keywords = {{recovery,wastewater,speciation,palladium,PLATINUM,modelling,ion-exchange,NANOPARTICLES,SPECTROMETRY,SEPARATION,STABILITY,RHODIUM}},
language = {{eng}},
number = {{7}},
pages = {{1738--1745}},
title = {{Chemical fractionation and speciation modelling for optimization of ion-exchange processes to recover palladium from industrial wastewater}},
url = {{http://doi.org/10.2166/wst.2016.007}},
volume = {{73}},
year = {{2016}},
}
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