Abstract
Amino-functionalised (triethylenetetramine) macroporous lignin monoliths were produced by curing an emulsion template containing untreated kraft black liquor with oxirane-crosslinkers. These lignin-based adsorbents were tested for the removal of Cr(VI) from water and synthetic waste water. A one-pot rout for their production is presented and their chemical and physical nature was investigated. Produced monoliths were tested in static and continuous adsorption experiments and chromium removal from water and synthetic wastewater was quantified via UV–vis spectroscopy. The nitrogen content of functionalised lignin monoliths reached up to 5.1 wt%, leading to adsorption capacities of up to 897 mg/g at pH = 2, as compared to non-functionalised lignin monoliths with a maximum adsorption capacity of 117 mg/g. The adsorption capacity of lignin monoliths produced is amongst the highest of bio-based materials presented in the literature.
| Original language | English |
|---|---|
| Article number | 113621 |
| Journal | Journal of environmental chemical engineering |
| Volume | 12 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Oct 2024 |
Funding
The authors gratefully acknowledges financial support by the Austrian Science Fond (FWF). We acknowledge the financial support from Faculty of Chemistry, University of Vienna. We would also like to thank Zellstoff AG P\u00F6ls for providing black liquor. We thank Christoph Baumgartinger for ICP-MS analysis, Qixiang Jiang for XPS measurements, and Johannes Theiner for elemental analysis. We also thank the students who involved in the experimental and characterization parts, Magnus K\u00F6llermayer and Corentin Bolatre. We greatly acknowledge the Austrian Science Fund FWF for funding our work through the project BIOMAMA (project number I 4864).
Austrian Fields of Science 2012
- 205019 Material sciences
- 207101 Waste engineering
Keywords
- Cr(VI) removal
- Heavy metal removal from wastewater
- Kraft black liquor
- Lignin
- Natural polymer adsorbent