University of Oulu

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,

Utilisation of barium-modified analcime in sulphate removal : isotherms, kinetics and thermodynamics studies

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Author: Runtti, Hanna1; Tynjälä, Pekka2; Tuomikoski, Sari1;
Organizations: 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
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.7 MB)
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Language: English
Published: Elsevier, 2017
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.

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Series: Journal of water process engineering
ISSN: 2214-7144
ISSN-E: 2214-7144
ISSN-L: 2214-7144
Volume: 16
Pages: 319 - 328
DOI: 10.1016/j.jwpe.2016.11.004
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
215 Chemical engineering
Funding: This study has been undertaken with the financial support of the project SULKA (A32164, 524/2012) and Maa- ja vesitekniikan tuki ry.
Copyright information: © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license