Multiple pollutants removal by functionalized heterostructures based on Na-2-Mica

• Published in: Applied clay science Vol. 196; p. 105749
• Main Authors: Pazos, M. Carolina, Bravo, Lisette Ruiz, Ramos, Sebastián E., Osuna, Francisco J., Pavón, Esperanza, Alba, María D.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2020
• Subjects: Heavy metal; Herbicide; Heterostructures; MPTMS; Organomica; Thiol groups; Thiol groups; Organomica; MPTMS; Heterostructures; Herbicide; Heavy metal
• ISSN: 0169-1317; 1872-9053
• DOI: 10.1016/j.clay.2020.105749

Organomica, C8–2-Mica, was obtained from a high charged synthetic mica, Na-2-Mica, by cation exchange reaction with octylammonium cations and these were used to host other bulky guest species such as polyhydroxy aluminium cations, Al1320. The hydrolization of 3-mercaptopropyltrimethoxysilane (MPTMS) allowed the covalent attachment with hydroxyl groups of the oligomeric cation, providing thiol groups that create specific adsorption sites, Al1320/SH. The structure of the adsorbents was analysed by XRD and Infrared spectroscopy and these were tested as an adsorbent for the removal of zinc and herbicide MCPA from aqueous solutions. C8–2-Mica was the best adsorbent for MCPA and thiol groups favoured the adsorption of Zn2+. Moreover, Al1320/SH showed excellent adsorptive properties for the simultaneous adsorption of MCPA and Zn2+. [Display omitted] •Combined adsorption sites of design mica for remediation multiple pollutants•Organophilic adsorbents favoured the adsorption of MCPA.•Mercaptografted adsorbents favoured the adsorption of Zn2+.•Thiol-PILC was excellent adsorbent for simultaneous adsorption of MCPA/Zn2+.