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ORIGINAL RESEARCH article

Front. Chem.
Sec. Green and Sustainable Chemistry
Volume 12 - 2024 | doi: 10.3389/fchem.2024.1450089
This article is part of the Research Topic Advances in Nanotechnology for the Removal and Detection of Emerging Contaminants From Water View all 6 articles

Cyclodextrin-silica hybrid materials: synthesis, characterization, and application in pesticide aqueous removal

Provisionally accepted
Estefanía Baigorria Estefanía Baigorria 1,2*Lucas B. Carvalho Lucas B. Carvalho 2,3Luciana M. Alves Pinto Luciana M. Alves Pinto 3*Leonardo F. Fraceto Leonardo F. Fraceto 2*
  • 1 CONICET Mar del Plata, Mar del Plata, Argentina
  • 2 Sao Paulo State university Julio de Mesquita Filho, Sorocaba, Sorocaba, Brazil
  • 3 Universidade Federal de Lavras, Lavras, Minas Gerais, Brazil

The final, formatted version of the article will be published soon.

    Overusing and misusing pesticides, including paraquat (PQ), has led to numerous environmental contamination complications. PQ is an emerging bio-accumulative contaminant that is present in environmental aqueous matrices. Adsorption techniques are part of a set of technologies applied in ecological remediation, with high effectiveness in removing aqueous PQ. A study of the PQ adsorption capacity of three cyclodextrin-silica nanocomposites (α-CDSi, β-CDSi, and γ-CDSi) from contaminated waters is presented in this paper. The cyclodextrin-silica nanocomposites were synthesized via an esterification reaction between the inorganic matrix and cyclodextrins (α, β, and γ), and were characterized physicochemically by spectroscopic, thermal, and surface methods. Their PQ removal performance from contaminated aqueous media was studied under different experimental conditions. The results showed a fast adsorptive response in removal treatment studies over time. Adsorption capacities of 87.22, 57.17, and 77.27 mg.g-1 were found forα-CDSi, β-CDSi, and γ-CDSi at only 30 min of treatment. Thermodynamic studies indicated spontaneous and exothermic adsorption processes. The removal assays responded mainly to physisorption mechanisms with contributions from chemisorption mechanisms. Spectroscopic assays showed a strong interaction of PQ with the adsorbents used. Innovative CDSi nanocomposites have proven to be highly efficient in applying aqueous PQ remediation, thus proving to be sustainable adsorbents of contaminants of emerging importance worldwide.

    Keywords: Adsorption, Nanocomposites, Pesticides, Environmental Remediation, Water remediation

    Received: 19 Jun 2024; Accepted: 12 Aug 2024.

    Copyright: © 2024 Baigorria, Carvalho, Alves Pinto and Fraceto. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Estefanía Baigorria, CONICET Mar del Plata, Mar del Plata, Argentina
    Luciana M. Alves Pinto, Universidade Federal de Lavras, Lavras, 37200-900, Minas Gerais, Brazil
    Leonardo F. Fraceto, Sao Paulo State university Julio de Mesquita Filho, Sorocaba, Sorocaba, Brazil

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.