Gomis-Berenguer Alicia, Laidin Isabelle, Renoncial Sophie, Cagnon Benoît
Interfaces, Confinement, Matériaux et Nanostructures-ICMN, UMR 7374-CNRS, Université d'Orléans 1B, Rue de La Férollerie, CS 40 059 45071 Orléans Cedex 2 France
JACOBI Carbons 15 Route de Foëcy 18100 Vierzon France.
RSC Adv. 2020 Nov 5;10(66):40321-40328. doi: 10.1039/d0ra07745c. eCollection 2020 Nov 2.
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 -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.
使用了四种活性炭来分析除草剂异丙甲草胺不同对映体混合物在水溶液中的吸附情况。测量了吸附动力学和等温线，并采用不同的理论模型进行拟合，以全面分析吸附机理。观察到不同的吸附容量与吸附剂的结构特征有关，这表明微孔和中孔的发育对吸附剂 - 吸附质相互作用有重要影响。此外，在所使用的两种活性炭中检测到了对映选择性吸附，与外消旋混合物相比，对 - 异丙甲草胺对映体的吸附量更大。这一事实与除草剂某些构象体对较大孔隙的可及性有关，有利于非静电吸附。
