The adsorption mechanism of Zn2+ by triclinic birnessite and the mechanism
In this paper, the reaction mechanism for the adsorption of Zn2+ by synthetic triclinic Na-birnessite was studied by reacting synthetic triclinic Na-birnessite with Zn2+ in solution, thereby providing a theoretical basis for the purification of heavy metal ions in acid soil and water by triclinic bi...
| Veröffentlicht in: | Environmental technology. - 1993. - 43(2022), 6 vom: 15. Feb., Seite 927-934 |
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| Weitere Verfasser: | , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2022
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| Zugriff auf das übergeordnete Werk: | Environmental technology |
| Schlagworte: | Journal Article Hexagonal Na-birnessite Triclinic Na-birnessite Zn2+ in solution adsorption effect reaction mechanism Metals, Heavy Oxides birnessite Zinc |
| Zusammenfassung: | In this paper, the reaction mechanism for the adsorption of Zn2+ by synthetic triclinic Na-birnessite was studied by reacting synthetic triclinic Na-birnessite with Zn2+ in solution, thereby providing a theoretical basis for the purification of heavy metal ions in acid soil and water by triclinic birnessite. The adsorption effect of Zn2+ on Na-birnessite enhances with an increase in either reaction time or Na-birnessite dosage, as well as decrease of pH. Na-birnessite can effectively adsorb Zn2+ in acidic solutions without any secondary pollution, and the stronger the acidity, the better the treatment effect. In acidic conditions, H+ in solution exchanges with Na+ in the interlayer of triclinic Na-birnessite, then a small part of Zn2+ in solution exchanges with the Mn2+ produced during the triclinic-to-hexagonal phase transformation, and most of the Zn2+ forms a complex with OH- on the octahedral layer, which loses protons due to the consumption of H+ ions. Finally, Zn2+ adsorbs above and below octahedral vacancies in hexagonal birnessite in either an octahedral or tetrahedral coordination |
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| Beschreibung: | Date Completed 14.02.2022 Date Revised 14.02.2022 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1479-487X |
| DOI: | 10.1080/09593330.2020.1811393 |