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https://hdl.handle.net/2440/127065
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Type: | Journal article |
Title: | Superhydrophobic/superoleophilic natural fibres for continuous oil-water separation and interfacial dye-adsorption |
Author: | Nine, M.J. Kabiri, S. Sumona, A.K. Tung, T.T. Abdelsadik, M.M. Losic, D. |
Citation: | Separation and Purification Technology, 2020; 233:116062-1-116062-10 |
Publisher: | Elsevier |
Issue Date: | 2020 |
ISSN: | 1383-5866 1873-3794 |
Statement of Responsibility: | Md J. Nine, Shervin Kabiri, Achia K. Sumona, Tran T. Tung, Mahmoud M. Moussa, Dusan Losic |
Abstract: | The inconsistent wettability of biological superwetting materials, due to aging, morphological change, structural fragility and biodegradation, limit their practical use for highly demanding applications such as oil-water separation and dye adsorption. Herein, we present a new source of superwetting materials harvested from waste chestnut-shell. The material is in the form of micro-fibres which are intrinsically oleophilic/hydrophobic, chemically stable, lightweight and structurally robust. The harvested microfibres, laying between inner-liner and outer shell of the chestnut, are naturally enriched with aliphatic and aromatic hydrocarbon that results in their high oleophilicity. We demonstrated that these superoleophilic fibre-networks could be used as oil-absorbent exhibiting outstanding absorption efficiency with a maximum capacity of ~94% of their own weight. Afterwards, an efficient filtration membrane was engineered using these micro-fibres showing their ability for continuous oil-water separation process for a series of organic solvents (toluene, canola oil, engine oil, hexane, turpentine oil, petrol and olive oil) co-existing with water. Furthermore, the fibres were realized to be capable of adsorbing organic dyes at oil-water interfaces in both static (slow adsorption) and dynamic (instant adsorption) condition suggesting their multifunctionality in wastewater treatments. A small amount of fibres (0.75 g/L) could efficiently remove water miscible dyes of Rhodamine-B and Methylene blue with a maximum removal efficiency of 88% and ~91%, respectively. These low-cost natural fibres from biowaste with outstanding oil-water separation and organic dye-adsorption capacity have considerable advantages compared to other low-cost materials reported earlier for industrial wastewater-treatment and environmental remediation. |
Keywords: | Biowaste; microfibres; superoleophilicity; separation; adsorption |
Rights: | © 2019 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.seppur.2019.116062 |
Grant ID: | http://purl.org/au-research/grants/arc/IH150100003 |
Published version: | http://dx.doi.org/10.1016/j.seppur.2019.116062 |
Appears in Collections: | ARC Research Hub for Graphene Enabled Industry Transformation publications Aurora harvest 8 Chemical Engineering publications |
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