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Sulphate removal over barium-modified blast-furnace-slag geopolymer

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Runtti, H., Luukkonen, T., Niskanen, M., Tuomikoski, S., Kangas, T., Tynjälä, P., . . . Lassi, U. (2016). Sulphate removal over barium-modified blast-furnace-slag geopolymer. Journal of Hazardous Materials, 317, 373-384. doi:10.1016/j.jhazmat.2016.06.001
Published in
Journal of Hazardous Materials
Authors
Runtti, Hanna |
Luukkonen, Tero |
Niskanen, Mikko |
Tuomikoski, Sari |
Kangas, Teija |
Tynjälä, Pekka |
Tolonen, Emma-Tuulia |
Sarkkinen, Minna |
Kemppainen, Kimmo |
Rämö, Jaakko |
Lassi, Ulla
Date
2016
Discipline
Kemia
Copyright
© 2016 Elsevier. This is a final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher.

 
Blast-furnace slag and metakaolin were geopolymerised, modified with barium or treated with a combination of these methods in order to obtain an efficient SO42− sorbent for mine water treatment. Of prepared materials, barium-modified blast-furnace slag geopolymer (Ba-BFS-GP) exhibited the highest SO42− maximum sorption capacity (up to 119 mg g−1) and it compared also favourably to materials reported in the literature. Therefore, Ba-BFS-GP was selected for further studies and the factors affecting to the sorption efficiency were assessed. Several isotherms were applied to describe the experimental results of Ba-BFS-GP and the Sips model showed the best fit. Kinetic studies showed that the sorption process follows the pseudo-second-order kinetics. In the dynamic removal experiments with columns, total SO42− removal was observed initially when treating mine effluent. The novel modification method of geopolymer material proved to be technically suitable in achieving extremely low concentrations of SO42− (<2 mg L−1) in mine effluents. ...
Publisher
Elsevier B.V.
ISSN Search the Publication Forum
0304-3894
Keywords
blast-furnace slag metakaolin geopolymer adsorption sulphate
DOI
10.1016/j.jhazmat.2016.06.001
URI

http://urn.fi/URN:NBN:fi:jyu-201702201485

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