Lignin modified PVDF membrane with antifouling properties for oil filtration

Zakaria, N.A., Hazwan Hussin, M, Ahmad, A.L., Leo, C.P., Poh, Phaik Eong, Behzadian, Kourosh ORCID:, Akinwumi, Isaac I., Moghayedi, Alireza and Diazsolano, Joaquin (2021) Lignin modified PVDF membrane with antifouling properties for oil filtration. Journal of Water Process Engineering, 43. p. 102248.

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Lignin is a sustainable chemical that can be extracted from a wide range of lignocellulosic biowaste. It was blended into polymeric membranes to improve membrane morphology for filtration. Lignin dissolved in NaOH solution can be coated on different substrates to improve the surface hydrophilicity. In this work, the polyvinylidene fluoride (PVDF) membrane was coated with lignin to improve the filtration of oily water. Lignin was dissolved in NaOH solution with varied alkaline concentration (0.25–1.50 wt%) and lignin concentration (0.25–1.00 wt%). The PVDF membrane degraded in the highly alkaline solution, but the increasing lignin content reduced the membrane pore size for the effective rejection of oil emulsion. The PVDF membrane modified with 0.75 wt% of lignin in 0.5 wt% of NaOH solution attained a permeate flux about 70 L·m−2·h−1, but a slightly lower permeate flux of 55 L·m−2·h−1was recorded after immersed in alkaline solution 12 h. The lignin modified membrane rejected up to 99.30% of oil, while the neat PVDF membrane only rejected 83.30% of oil. The lignin modified membrane showed slightly lower but stable flux than the neat PVDF membrane due to the reduction of membrane fouling.

Item Type: Article
Identifier: 10.1016/j.jwpe.2021.102248
Additional Information: The authors would like to acknowledge the Royal Academy of Engineering for the financial support (under the Frontiers of Engineering for Development scheme with contract no FoE2021\9\2) to conduct this work.
Keywords: Lignin, Membrane, Microfiltration, Oil
Subjects: Construction and engineering > Civil and environmental engineering
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Depositing User: Kourosh Behzadian
Date Deposited: 20 Aug 2021 14:34
Last Modified: 01 Jun 2024 08:16


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