Hanna Runtti, Pekka Tynjälä, Sari Tuomikoski, Teija Kangas, Tao Hu, Jaakko Rämö, Ulla Lassi, Utilisation of barium-modified analcime in sulphate removal: Isotherms, kinetics and thermodynamics studies, Journal of Water Process Engineering, Volume 16, April 2017, Pages 319-328, ISSN 2214-7144, http://dx.doi.org/10.1016/j.jwpe.2016.11.004. (http://www.sciencedirect.com/science/article/pii/S2214714416302707) Keywords: Adsorption; Sulphate; Analcime; Zeolite; Chemical modification
Utilisation of barium-modified analcime in sulphate removal : isotherms, kinetics and thermodynamics studies
|Author:||Runtti, Hanna1; Tynjälä, Pekka2; Tuomikoski, Sari1;|
1University of Oulu, Research Unit of Sustainable Chemistry, P.O. Box 3000, FI-90014 University of Oulu, Finland
2University of Jyvaskyla, Kokkola University Consortium Chydenius, Unit of Applied Chemistry, Talonpojankatu 2B, FI-67100 Kokkola, Finland
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe201703235603
|Publish Date:|| 2019-04-01
Analcime and commercial zeolite were employed as a precursor for preparing sorbent material for SO₄²⁻ removal over barium modification. Three sorbents were prepared: barium-modified analcime (ANA-Na-Ba), barium-modified acid-washed analcime (ANA-Ac-Na-Ba) and barium-modified zeolite (ZSM5-Na-Ba). Of the prepared materials, ANA-Ac-Na-Ba was the most efficient sorbent material for SO₄²⁻ removal, with a maximum sorption uptake of 13.7 mg g⁻¹ at room temperature. Batch sorption experiments were performed to evaluate the effect of initial pH, initial SO₄²⁻ concentration, sorbent dosage, temperature and contact time of sorption. Several isotherms were applied to describe the experimental results and Bi-Langmuir was found to provide the best correlation for adsorption of SO₄²⁻ on ANA-Ac-Na-Ba. Kinetic studies were applied for the most effective sorbent material, ANA-Ac-Na-Ba, and the results showed that the sorption process follows pseudo-second-order kinetics.
Journal of water process engineering
|Pages:||319 - 328|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
116 Chemical sciences
215 Chemical engineering
This study has been undertaken with the financial support of the project SULKA (A32164, 524/2012) and Maa- ja vesitekniikan tuki ry.
© 2016 Elsevier Ltd. All rights reserved.
Published in this repository with the kind permission of the publisher.