Effects of Functional Group-Specific Complexation and Adsorption of Phytic Acid on its Degradation by Phytase
As one of the most predominant organic phosphorus (P) species in many soils, phytic acid could serve as a potentially important mineralizable P reservoir in soils and sediments. However, the active interaction between phytic acid and metals or minerals has rendered phytic acid recalcitrant against mineralization. The mechanisms of phytic acid adsorption on the calcite-water interface haven’t been extensively investigated. Furthermore, how phytic acid-Ca2+, or phytic acid-calcite interaction, affects the activity of phytase, a group of enzymes that can mineralize phytic acid, remains unclear. This study, therefore, investigated the adsorption mechanism of phytic acid at the calcite-water interface and how Ca2+ (aq) or calcite affected phytase activity using different spectroscopic techniques.
