Some structural and electronic features of the interaction of phosphate with metal-humic complexes.

摘要: Previous studies demonstrated the formation of stable phosphate−metal−humic complexes in solution. These studies, however, indicated that proportion complexed metal intervenes phosphate fixation is rather low. In this study we investigate possible structural and electronic features binding site involved metal−humic could explain fact. To end, have studied involving Fe(III), Al(III), Zn(II) using three complementary techniques: infrared spectroscopy (FTIR), fluorescence, molecular modeling. The FTIR that, case those Fe Zn phosphate, associated with a stabilization metal−carboxylate bond. Al effect less clear. This on characteristics was also supported by results obtained Fluorescence study, which showed significant changes i...