Journal
CHEMICAL ENGINEERING JOURNAL
Volume 390, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.124667
Keywords
Lysozyme nanofibrils; PEI; Polydopamine; Heavy metal
Categories
Funding
- NSFC [51578476, 21876145]
- Supporting Plan for 100 Excellent Innovative Talents in Colleges and Universities of Hebei Province [SLRC2019041]
- Support Program for the Top Young Talents of Hebei Province
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In this work, a new adsorbent, i.e., lysozyme nanofibrils conjugated with long-chain PEI, which could be successfully modified with the aid of a polydopamine (PDA) interface, was prepared by a simple and green method. The resulting fibrous composites exhibited superior adsorption and selectivity for lead (II) removal due to their primary amino groups, even in the presence of coexisting Ca2+/Mg2+/Na+ ions at higher concentrations. The selectivity index was approximately 80 times higher than those of the primitive matrix and the commercial ion exchange resin 001x7. The high surface-to-volume morphology also enabled fast kinetics in 2 min. The modified nanofibrils effectively treated similar to 12200 kg contaminated water/kg sorbent and could be regenerated. The effluent Pb concentration could be reduced to below 10 mu g/L, meeting the criterion for drinking water recommended by WHO. The bioinspired simple fabrication and efficient performance of these nanofibrils make them highly promising for alleviating Pb contamination problems.
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