Journal
CHEMOSPHERE
Volume 231, Issue -, Pages 510-517Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.05.173
Keywords
Metal-organic frameworks; Porous carbons; Membranes; Solid-phase extraction; Water pollutants
Categories
Funding
- Spanish Agencia Estatal de Investigacion (AEI-Spain) [CTQ2016-77155-R]
- European Funds for Regional Development (FEDER-European Union) [CTQ2016-77155-R]
- Spanish Ministerio de Educacion y Ciencia
- Vicerrectorado de Investigacion e Internacionalizacion of the UIB
- Facultad de Ciencias Quimicas of the UANL
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Porous carbon derived from amine-functionalized MIL-125 metal-organic framework (C-MIL-125-NH2) was prepared by carbonization at high temperature under inert atmosphere, and used for adsorption of bisphenol A (BPA) and 4-tert-butylphenol (4-tBP). The obtained carbon showed bimodal porosity and fast extraction of both pollutants in batch conditions following a pseudo-second-order model. The adsorption mechanism was studied by the measurement of zeta potential, and the results suggested that pi-pi stacking interactions between the carbon material and the phenol molecules probably are the main sorption mechanism. The prepared C-MIL-125-NH2 was incorporated into mechanically stable membranes for flow-through solid-phase extraction of studied phenols prior to HPLC analysis. The hybrid material showed excellent permeance to flow, easy regeneration and good performance for the simultaneous enrichment of mixtures of BPA and 4-tBP, facilitating their determination when present at low concentration levels. (C) 2019 Elsevier Ltd. All rights reserved.
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