Issue 66, 2020

Study of enantioselective metolachlor adsorption by activated carbons

Abstract

Four activated carbons were employed to analyse the adsorption of different enantiomeric mixtures of the herbicide metolachlor in aqueous solution. The adsorption kinetics and isotherms were measured and fitted with different theoretical models to exhaustively analyse the adsorption mechanism. Different adsorption capacities were observed as a function of textural features of the adsorbents revealing an important effect of the presence of micro and mesoporous development on the adsorbent–adsorbate interactions. Additionally, enantioselective adsorption was detected for two of the activated carbons employed, rendering a greater adsorption of the S-metolachlor enantiomer compared to the racemic mixture. This fact was associated to the accessibility of certain conformers of the herbicide to the larger pores, facilitating the non-electrostatic adsorption.

Graphical abstract: Study of enantioselective metolachlor adsorption by activated carbons

Supplementary files

Article information

Article type
Paper
Submitted
09 Sep 2020
Accepted
29 Oct 2020
First published
05 Nov 2020
This article is Open Access
Creative Commons BY license

RSC Adv., 2020,10, 40321-40328

Study of enantioselective metolachlor adsorption by activated carbons

A. Gomis-Berenguer, I. Laidin, S. Renoncial and B. Cagnon, RSC Adv., 2020, 10, 40321 DOI: 10.1039/D0RA07745C

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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