Copper(II) influence on flumequine retention in soils: Macroscopic and molecular investigations

► Flumequine is classified at environmentally relevant pH as a slow-mobile compound in soils. ► Copper enhances flumequine retention onto soils. ► EXAFS and XANES spectra evidence the formation of a ternary complex. ► Formation of a ternary complex leads to an increase of the adsorbed flumequine amount.