Characterization of Cd Binding Sites on Datura Innoxia Using 113Cd NMR Spectrometry

Abstract

The interactions between Cd(II) and Datura innoxia cells have been examined using 113 Cd NMR spectroscopy. A series of model solutions containing carboxylate, amine, hydroxyl, sulfhydryl, oxalate, sulfate, and sulfonate functionalities have been utilized to identify the moieties on the cell wall responsible for the observed chemical shifts. Carborylate groups have been determined to be the dominant functional groups responsible for binding of Cd(II) on the cell wall of D. innoxia at pH≤5