Removal of a Metolachlor Metabolite from Aqueous solution by adsoprtion

In the present work we explore the capability of ZSM-12 to remove contaminants metabolites from aqueous matrix. 2-ethyl-6-methylaniline (C2H5C6H3(CH3)NH2, labelled EMA) was chosen as target metabolite of Metolachlor due to its environmental relevance. The ZSM-12 framework has one-dimensional pore system delimited by 12 membered-rings (12MRs), the regular one-dimensional nanochannel system is ideal to prevent inserted molecules from escaping as well as the entering of other competitive molecules, nonetheless it has not yet been employed as sorbent. In this work, for the first time, the employment of ZSM-12 in the adsorption of EMA from water was evaluated by combining chromatographic, thermogravimetric and synchrotron X-ray powder diffractometric techniques. The study has revealed that ZSM-12 has good adosption capacity toward EMA. Additionally, the presence of a complex host-guest system inolving water coadsorbed molecules has been shown. These information provide a basis in understanding zeolite-pesticide interactions and gives insights for the applicability of ZSM-12 zeolite in water remediation.