Pepper, Sarah E, Whittle, Karl R ORCID: 0000-0002-8000-0857, Harwood, Laurence M, Cowell, Joseph, Lee, Taek Seung and Ogden, Mark D
(2018)
Cobalt and nickel uptake by silica-based extractants.
SEPARATION SCIENCE AND TECHNOLOGY, 53 (10).
pp. 1552-1562.
Text
Pepper_CoNiuptake by EBP-Si.docx - Author Accepted Manuscript Download (1MB) |
Abstract
The pKas of ethyl/butyl phosphonate silica (EBP-Si) have been determined, and the removal of cobalt and nickel from solution was investigated as a function of various parameters and compared with those of Purolite S950. pH uptake experiments suggested a combination of ion exchange and acid dissociation of the surface occurring. Isotherm data, fitted using the Langmuir and Dubinin–Radushkevich (D-R) models, indicated that stronger complexes formed with S950 than with EBP-Si. Kinetic data, fitted using a pseudo-second-order model, suggested that the rate-determining process is the reaction of metal ions with the chelating functionality of the resin. Uptake by EBP-Si is two to three times faster than that on S950.
Item Type: | Article |
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Uncontrolled Keywords: | Ion exchange, silica-based resin, Purolite S950, cobalt, nickel |
Depositing User: | Symplectic Admin |
Date Deposited: | 11 Jan 2018 08:41 |
Last Modified: | 19 Jan 2023 06:46 |
DOI: | 10.1080/01496395.2017.1405034 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3015838 |