Removal of S-metolachlor herbicide from aqueous solutions by meso and microporous organosilica materials

• DOI: 10.1016/j.micromeso.2018.11.018
• Publication Date: 2018-11-14T12:13:17Z
• Authors: R. Otero; María Isabel López; Dolores Esquivel; J.M. Fernández; Francisco J. Rome...
• Keywords: Metolachlor

Abstract The adsorption of S-metolachlor herbicide from aqueous solution by benzenesilica materials was studied. The materials were synthesized with 1,4-bis(triethoxysilyl)benzene as organosilica precursor and Brij 76 and Pluronic P123 as surfactants. Additionally, 1,3,5-triisopropylbenzene (TPB) was used as porogen to produce microporosity. Those materials obtained by Brij-76 and P123 showed well-structured ordering. However, a disordered microporous benzenesilica material was obtained in presence of P123 and TPB. All materials proved to be efficient adsorbents for S-metolachlor. Among them, the material synthesized with Brij 76 showed the highest adsorption capacity due to its ordered structure and, mainly, to its higher proportion of mesopores.