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Abstract
This work investigates the proanthocyanidin profile of willow bark crude extracts and these materials were cationized and preliminarily tested as biocoagulants for water treatment. The characteristics of crude extracts proanthocyanidin were investigated using size exclusion chromatography (SEC), nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS). XPS analysis indicates that the crude extracts contain significant amounts of sugars. Furthermore, SEC and liquid-state NMR spectroscopy showed that crude extract contains roughly 3–4 flavan-3-ol units with procyanidin (PC)/ prodelphinidin (PD) ratio of roughly 3–5. Thus, the modified form of tannin (proanthocyanidin-enriched) coagulants obtained the higher cationic charge density. The coagulation experiments with kaolin-river water mixture suggested that all the selected willow hybrids’ tannin coagulants were effective in settling the particles down. This study indicates that the value of willow bark can be significantly improved by the usage of crude extracts for water treatment.
Original language | English |
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Article number | 117962 |
Number of pages | 8 |
Journal | Industrial Crops and Products |
Volume | 209 |
Early online date | 5 Jan 2024 |
DOIs | |
Publication status | Published - Mar 2024 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Biocoagulant
- Colloids destabilization
- Proanthocyanidins
- Surface water treatment
- Willow bark crude extracts
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Dive into the research topics of 'Characterization of crude extracts from willow barks and their performance as proanthocyanidin -based coagulants in water treatment'. Together they form a unique fingerprint.-
FACE+: Stability enhancement of softwood (sawdust wood and bark) stilbene through chemical functionalization as ultrastable UV-filters in sunscreen
Dou, J. (Principal investigator)
01/09/2023 → 31/08/2027
Project: Academy of Finland: Other research funding
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FinnCERES: Competence Center for the Materials Bioeconomy: A Flagship for our Sustainable Future
Mäkelä, K. (Principal investigator)
01/05/2018 → 31/12/2022
Project: Academy of Finland: Other research funding
Equipment
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Raw Materials Research Infrastructure
Karppinen, M. (Manager)
School of Chemical EngineeringFacility/equipment: Facility
Press/Media
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Researchers from Aalto University Provide Details of New Studies and Findings in the Area of Industrial Crops and Products (Characterization of Crude Extracts From Willow Barks and Their Performance As Proanthocyanidin -based Coagulants In ...)
Koivisto, J., Dou, J. & Vuorinen, T.
05/03/2024
1 item of Media coverage
Press/Media: Media appearance