Water Film-Mediated Hydrolysis of Pyrophosphate on a Nanosized Mn Oxide.

ABSTRACT: The geochemical behaviors of phosphate-containing species at mineral surfaces are of fundamental importance for controlling phosphorus (P) mobility, fate, and bioavailability. Understanding these interfacial behaviors in water-unsaturated environments, where minerals are covered by thin water films, is of special importance in the context of soil vadose zone geochemistry. This study resolved the transformation of pyrophosphate to orthophosphate within the confines of nanometer-thick water films condensed on nanosized birnessite (MnO₂). Time-resolved vibrational spectroscopy indicated that PP was effectively degraded into monodentate mononuclear complexes on MnO₂ and at rates that followed zero-order kinetics. We found a direct link between PP degradation kinetics and

SUBMITTER: Chen T 

PROVIDER: S-EPMC12444992 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature