BDST modelling of sodium ion exchange column behaviour with strong acid cation resin in relation to coal seam water treatment

Pember, Nathan, Millar, Graeme J., Couperthwaite, Sara J., de Bruyn, Mitchell, & Nuttall, Kenneth (2016) BDST modelling of sodium ion exchange column behaviour with strong acid cation resin in relation to coal seam water treatment. Journal of Environmental Chemical Engineering, 4(2), pp. 2216-2224.

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Reverse osmosis is the dominant technology utilized for desalination of saline water produced during the extraction of coal seam gas. Alternatively, ion exchange is of interest due to potential cost advantages. However, there is limited information regarding the column performance of strong acid cation resin for removal of sodium ions from both model and actual coal seam water samples. In particular, the impact of bed depth, flow rate, and regeneration was not clear. Consequently, this study applied Bed Depth Service Time (BDST) models to reveal that increasing sodium ion concentration and flow rates diminished the time required for breakthrough to occur. The loading of sodium ions on fresh resin was calculated to be ca. 71.1 g Na/kg resin. Difficulties in regeneration of the resin using hydrochloric acid solutions were discovered, with 86% recovery of exchange sites observed. The maximum concentration of sodium ions in the regenerant brine was found to be 47,400 mg/L under the conditions employed. The volume of regenerant waste formed was 6.2% of the total volume of water treated. A coal seam water sample was found to load the resin with only 53.5 g Na/kg resin, which was consistent with not only the co-presence of more favoured ions such as calcium, magnesium, barium and strontium, but also inefficient regeneration of the resin prior to the coal seam water test.

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ID Code: 94777
Item Type: Journal Article
Refereed: Yes
Keywords: ion exchange, strong acid cation resin, BDST, column, coal seam gas
DOI: 10.1016/j.jece.2016.04.002
ISSN: 2213-3437
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CHEMICAL ENGINEERING (090400) > Water Treatment Processes (090410)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2016 Elsevier
Copyright Statement: Licensed under the Creative Commons Attribution; Non-Commercial; No-Derivatives 4.0 International. DOI: 10.1016/j.jece.2016.04.002
Deposited On: 12 Apr 2016 23:01
Last Modified: 17 Apr 2016 05:10

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