Developing a Rate Law for Ce(III) Oxidation by Manganese Oxides.

ABSTRACT: Rare earth elements (REEs) are critical minerals that are indispensable for clean energy technologies. Understanding REE occurrence and transport in natural environments is important for the prediction and identification of REE resources. Cerium (Ce) is a rare earth element that exhibits multiple oxidation states. The oxidation of dissolved Ce(III) by manganese oxides (MnO₂) and the resulting Ce anomaly is used as an indicator for tracing biogeochemical processes controlling REE transport and mobility, as well as a paleo-redox proxy for understanding Earth's oxygenation events. However, a detailed kinetic rate law for this process is still lacking. This study determines the reaction orders and rate constant for Ce(III) oxidation by δ-MnO₂ using the initial rate method

SUBMITTER: Xu H 

PROVIDER: S-EPMC12224318 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature