| Title: | Amine Modification of Silica Aerogels/Xerogels for Removal of Relevant Environmental Pollutants |
| Author(s): | Lamy-Mendes A; Torres RB; Vareda JP; Lopes D; Ferreira M; Valente V; Girao AV; Valente AJM; Duraes L; |
| Address: | "CIEPQPF, Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal. alyne@eq.uc.pt. CICECO-Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal. alyne@eq.uc.pt. CIEPQPF, Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal. rtorres@eq.uc.pt. CIEPQPF, Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal. jvareda@eq.uc.pt. CIEPQPF, Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal. davidPned10@hotmail.com. CIEPQPF, Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal. ferreiramarcojl@hotmail.com. CIEPQPF, Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal. vanessa.valente1994@gmail.com. CICECO-Aveiro Institute of Materials, Department of Materials and Ceramic Engineering, University of Aveiro, 3810-193 Aveiro, Portugal. avgirao@ua.pt. CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal. avalente@ci.uc.pt. CIEPQPF, Department of Chemical Engineering, University of Coimbra, 3030-790 Coimbra, Portugal. luisa@eq.uc.pt" |
| DOI: | 10.3390/molecules24203701 |
| ISSN/ISBN: | 1420-3049 (Electronic) 1420-3049 (Linking) |
| Abstract: | "Serious environmental and health problems arise from the everyday release of industrial wastewater effluents. A wide range of pollutants, such as volatile organic compounds, heavy metals or textile dyes, may be efficiently removed by silica materials advanced solutions such as aerogels. This option is related to their exceptional characteristics that favors the adsorption of different contaminants. The aerogels performance can be selectively tuned by an appropriate chemical or physical modification of the aerogel's surface. Therefore, the introduction of amine groups enhances the affinity between different organic and inorganic contaminants and the silica aerogels. In this work, different case studies are reported to investigate and better understand the role of these functional groups in the adsorption process, since the properties of the synthesized aerogels were significantly affected, regarding their microstructure and surface area. In general, an improvement of the removal efficiency after functionalization of aerogels with amine groups was found, with removal efficiencies higher than 90% for lead and Rubi Levafix CA. To explain the adsorption mechanism, both Langmuir and Freundlich models were applied; chemisorption is most likely the sorption type taking place in the studied cases" |
| Keywords: | "Adsorption Amines/*chemistry Coloring Agents/chemistry *Environmental Pollutants Kinetics Metals, Heavy/chemistry Silicon Dioxide/*chemistry Silicone Gels/*chemistry Volatile Organic Compounds amine modification heavy metals silica aerogels textile dyes;" |
| Notes: | "MedlineLamy-Mendes, Alyne Torres, Rafael B Vareda, Joao P Lopes, David Ferreira, Marco Valente, Vanessa Girao, Ana V Valente, Artur J M Duraes, Luisa eng 234184/2014-0/GDE/Conselho Nacional de Desenvolvimento Cientifico e Tecnologico/ Contract No 17815/European Regional Development Fund/ SFRH/BD/131280/2017/Fundacao para a Ciencia e a Tecnologia/ Decree-Law 57/2016, changed by Law 57/2017/Fundacao para a Ciencia e a Tecnologia/ UID/EQU/00102/2019/Fundacao para a Ciencia e a Tecnologia/ UID/CTM/50011/2019/Fundacao para a Ciencia e a Tecnologia/ UID/QUI/00313/2019/Fundacao para a Ciencia e a Tecnologia/ POCI-01-0145-FEDER-006910/European Regional Development Fund/ POCI-01-0145-FEDER-007679/European Regional Development Fund/ Switzerland 2019/10/18 Molecules. 2019 Oct 15; 24(20):3701. doi: 10.3390/molecules24203701" |
