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Investigating the influence of pectin content and structure on its functionality in bio-flocculant extracted from okra

Millett, Rachael; Mao, Yujie; Millet, Rachael; Lee, Chai Siah; Yakubov, Gleb; Harding, Stephen E.; Binner, Eleanor

Authors

Rachael Millett

YUJIE MAO Yujie.Mao1@nottingham.ac.uk
Research Fellow

Rachael Millet

Dr CHAI LEE CHAI.JESSLYN@NOTTINGHAM.AC.UK
Upstream Processing Engineering Scientist [green Chemicals Beacon]

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DR GLEB YAKUBOV GLEB.YAKUBOV@NOTTINGHAM.AC.UK
Assistant Professor in Food Composites_*



Abstract

© 2020 The Author(s) Okra extract is known to have potential application as a bio-flocculant for wastewater treatment. However, no research to date has given insight into the components responsible for the flocculating ability of okra extract or its flocculating mechanism. The work presented here addresses this knowledge gap showing that pectin, especially pectin homogalacturonan (HGA) regions, appear to be the polysaccharides responsible for the flocculating ability of okra extract. The way pectin works in flocculation may be best explained by a polymer bridging mechanism. Specifically, a linear relationship between okra bio-flocculating ability and pectin homogalacturonan region to rhamnogalacturonan-I region weight ratio (HGA/RG-I) was found (y = 2.0x+47.6, R2 = 0.93, when GalA content > 300 mg/g extract), which was also validated using commercial citrus peel pectin.

Citation

Millett, R., Mao, Y., Millet, R., Lee, C. S., Yakubov, G., Harding, S. E., & Binner, E. (2020). Investigating the influence of pectin content and structure on its functionality in bio-flocculant extracted from okra. Carbohydrate Polymers, 241, https://doi.org/10.1016/j.carbpol.2020.116414

Journal Article Type Article
Acceptance Date May 5, 2020
Online Publication Date May 12, 2020
Publication Date Aug 1, 2020
Deposit Date May 19, 2020
Publicly Available Date May 13, 2021
Journal Carbohydrate Polymers
Print ISSN 0144-8617
Electronic ISSN 1879-1344
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 241
Article Number 116414
DOI https://doi.org/10.1016/j.carbpol.2020.116414
Keywords Organic Chemistry; Materials Chemistry; Polymers and Plastics
Public URL https://nottingham-repository.worktribe.com/output/4470133
Publisher URL https://www.sciencedirect.com/science/article/pii/S0144861720305889

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