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Design and function of lignin/silk fibroin-based multilayer water purification membranes for dye adsorption. | LitMetric

Design and function of lignin/silk fibroin-based multilayer water purification membranes for dye adsorption.

Int J Biol Macromol

Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan 430068, China. Electronic address:

Published: December 2023

AI Article Synopsis

  • Dye wastewater treatment is a significant challenge, particularly due to the secondary pollution from membrane residues, necessitating innovative solutions.* -
  • The study introduces a novel multilayer nanofiber structure made from biological materials like lignin and silk fibroin, which enhances dye interception and antimicrobial properties.* -
  • The eucalyptus lignin/SF membrane shows over 99.5% retention of various dyes and effectively captures heavy metals, offering a sustainable option for water purification that is biodegradable.*

Article Abstract

The treatment of dye wastewater poses a significant challenge to the sewage recycling industries. However, the reduction of secondary pollution resulting from the membrane residues, to maintain high performance, remains a considerable obstacle. A novel approach for the fabrication of multilayer nanofiber structures using a layer-by-layer electrostatic spinning technique with biological materials was reported in this study. Incorporating the chemical adsorption advantages of lignin nanofiber and the physical adsorption advantages of silk fibroin (SF) nanofiber enabled the full realization of excellent dye interception performance. A comparative analysis was conducted on the lignin derived from eucalyptus, pine, and straw to determine the most suitable option. Notably, eucalyptus lignin exhibited superior antimicrobial properties. The adsorption of crystal violet by eucalyptus lignin/SF membrane was consistent with the Freundlich isotherm model and the pseudo-second-order kinetic model, revealing a chemisorption mechanism involving Π-Π conjugation, hydrogen bonding, and the binding of anions and cations. The lignin/SF membrane exhibited a retention rate exceeding 99.5 % for crystal violet, methylene blue, and brilliant green dyes. Furthermore, it demonstrated efficacy in retaining heavy metal ions, including cadmium and copper. The original biomass material imparts the property of rapid degradation to a multilayer membrane that can be used as an effective and eco-friendly water purification material.

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Source
http://dx.doi.org/10.1016/j.ijbiomac.2023.126863DOI Listing

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