Regenerable, Innovative Porous Silicon-based Polymer-derived Ceramics for Removal of Methylene Blue and Rhodamine B from Textile and Environmental Waters
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Toxicology
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The presence of residual color in treated textile wastewater above the regulation limits is still a critical issue in many textile districts. Innovative, polymer-derived ceramics of the Si-C-O system were here synthesized in order to obtain porous nanocomposite materials where a free carbon phase is dispersed into a silicon carbide/silicon oxycarbide network. The sorbents were comprehensively characterized for the removal of two model water-soluble dyes (i.e., the cation methylene blue and the zwitterion rhodamine B). Adsorption is very rapid and controlled by intra-particle and/or film diffusion, depending on dye concentration. Among the nanocomposites studied, the SiOC aerogel (total capacity about 45 mg/g, is easily regenerated under mild treatment (250 °C, 2 h). Adsorption of dyes is not affected by the matrix composition: removals of 150 mg/L methylene blue from river water and simulated textile wastewater with high content of metal ions (2-50 mg/L) and chemical oxygen demand (800 mg/L) were higher than 92% and quantitative for a dye concentration of 1 mg/L.
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Cervantes-Diaz K, Drobek M, Julbe A, Cambedouzou J Materials (Basel). 2023; 16(4).
PMID: 36836960 PMC: 9959366. DOI: 10.3390/ma16041328.
Castiglioni M, Rivoira L, Ingrando I, Del Bubba M, Bruzzoniti M Molecules. 2021; 26(16).
PMID: 34443648 PMC: 8398246. DOI: 10.3390/molecules26165063.
Mesoporous Polymer-Derived Ceramic Membranes for Water Purification via a Self-Sacrificed Template.
Zhang Z, Bao Y, Sun X, Chen K, Zhou M, He L ACS Omega. 2020; 5(19):11100-11105.
PMID: 32455231 PMC: 7241006. DOI: 10.1021/acsomega.0c01021.
Durairaj A, Sakthivel T, Ramanathan S, Vasanthkumar S ACS Omega. 2019; 4(4):6476-6485.
PMID: 31459780 PMC: 6648192. DOI: 10.1021/acsomega.8b03279.