Harshita Gogoi, Tiina Leiviskä, Jaakko Rämö, Juha Tanskanen, Acid mine drainage treatment with novel high-capacity bio-based anion exchanger, Chemosphere, Volume 264, Part 1, 2021, 128443, ISSN 0045-6535, https://doi.org/10.1016/j.chemosphere.2020.128443
Acid mine drainage treatment with novel high-capacity bio-based anion exchanger
|Author:||Gogoi, Harshita1; Leiviskä, Tiina1; Rämö, Jaakko1;|
1Chemical Process Engineering, P.O. Box 4300, FIN-90014, University of Oulu, Oulu, Finland
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2020100277767
|Publish Date:|| 2022-09-26
Aminated peat (termed PG-Peat) produced using polyethylenimine and glycidyltrimethylammonium chloride was used for the removal of sulphate from real acid mine drainage (AMD) in batch and column mode sorption studies. In the batch tests, the highest sulphate removal capacity achieved was 125.7 mg/g. PG-Peat was efficient and rapid in sulphate removal from AMD even at low temperatures (2–5 °C), achieving equilibrium within a contact time of 30 min. The PG-Peat column treating real AMD showed even higher sulphate uptake capacity (154.2 mg SO₄²⁻/g) than the batch sorption studies. The regenerative and practical applicability of PG-Peat was also tested in column set-ups using synthetic sulphate solutions (at pH 5.8 and pH 2.0). The sulphate uptake capacity obtained was higher in column mode when the solutions were treated at acidic pH (2.0) compared to pH 5.8. This could be attributed to the presence of cationized amine groups on PG-Peat under acidic pH conditions. Almost complete sulphate desorption was achieved with NaCl in the column that treated synthetic sulphate solution at pH 5.8, while the lowest desorption rates were observed in the column that treated acidic synthetic sulphate solution (pH 2).
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
218 Environmental engineering
The study was conducted as part of the Comprehensive Sulphate Management in Cold Mining Waters (COSUMA) research project (Grant number 295050), funded by the Academy of Finland. The study was also part of the Supporting Environmental, Economic and Social Impacts of Mining Activity (KO1030 SEESIMA) research project, and received financial support from the Kolarctic CBC (Cross-Border Collaboration), the European Union, Russia, Norway, Finland and Sweden.
|Academy of Finland Grant Number:||
295050 (Academy of Finland Funding decision)
© 2020 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.