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- Title
Woody biomass derived nano lignin-enabled membrane with high structural stability for efficient wastewater treatment.
- Authors
Khan, Rabia Jalil; Lau, Chun Yin; Farid, Muhammad Usman; Islam, Md Khairul; An, Alicia Kyoungjin; Yi, Jiang; Leu, Shao-Yuan
- Abstract
The application of renewable and functional group-enriched lignin has recently gained massive popularity in wastewater treatment applications. Herein, woody biomass-derived organosolv lignin nanoparticles (LNPs) with uniform colloidal spherical morphology and average particle size (⁓150 nm) were synthesized via a simple and facile anti-solvent nanoprecipitation technique and used for the fabrication of ultrafiltration nanocomposite membrane. Upon the addition of LNPs to polyether sulfone (PES) matrix, the LNPs-impregnated membrane exhibited a thinner surface layer that induced low resistance to water flow, high pore density (83.2 ± 0.9%) with uniformly distributed pores, wider and well-connected internal macrovoids with higher sub-layer porosity, and a higher negative surface charge (−29.8 mV). These structural features hence contributed to high stable permeation flux (92.3 L m−2 h−1) and higher removal efficiencies (> 95%) for treating cationic (methylene blue) and anionic (methylene orange) dyes over a wide range of environmentally relevant pH conditions. The electrostatic interactions between the charged membrane surface and dye species revealed the underlying mechanism for higher dye rejection through the PES-LNP membrane. Finally, the structural stability analysis confirmed the complete incorporation/immobilization of LNPs within the PES matrix, making it ready for real-world applications in wastewater treatment. [Display omitted]
- Subjects
WASTEWATER treatment; STRUCTURAL stability; POLYETHERSULFONE; SURFACE charges; BIOMASS; COLOR removal (Sewage purification)
- Publication
Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B, 2024, Vol 182, p595
- ISSN
0957-5820
- Publication type
Article
- DOI
10.1016/j.psep.2023.12.019