Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4910086 | Journal of Water Process Engineering | 2017 | 10 Pages |
Abstract
Analcime and commercial zeolite were employed as a precursor for preparing sorbent material for SO42â 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 SO42â removal, with a maximum sorption uptake of 13.7 mg gâ1 at room temperature. Batch sorption experiments were performed to evaluate the effect of initial pH, initial SO42â 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 SO42â 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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Authors
Hanna Runtti, Pekka Tynjälä, Sari Tuomikoski, Teija Kangas, Tao Hu, Jaakko Rämö, Ulla Lassi,