Molecular Mechanisms of Chromium(III) Immobilization by Organo–Ferrihydrite Co-precipitates: The Significant Roles of Ferrihydrite and Carboxyl

The interaction mechanisms of heavy metals with organo–Fe hydroxides co-precipitates (OFC) remain unclear due to the structural complexity of the OFC. In this study, batch experiments were conducted to investigate the immobilization mechanisms of Cr(III) by the OFC, which was prepared by co-precipitating Fe3+ with rice/rape straw-derived dissolved organic carbon, through sorption and co-precipitation using synchrotron-based X-ray absorption...