Coprecipitation with Ferrihydrite Inhibits Mineralization of Glucuronic Acid in an Anoxic Soil.

ABSTRACT: It is known that the association of soil organic matter (SOM) with iron minerals limits carbon mobilization and degradation in aerobic soils and sediments. However, the efficacy of iron mineral protection mechanisms under reducing soil conditions, where Fe(III)-bearing minerals may be used as terminal electron acceptors, is poorly understood. Here, we quantified the extent to which iron mineral protection inhibits mineralization of organic carbon in reduced soils by adding dissolved ¹³C-glucuronic acid, a ⁵⁷Fe-ferrihydrite-¹³C-glucuronic acid coprecipitate, or pure ⁵⁷Fe-ferrihydrite to anoxic soil slurries. In tracking the re-partitioning and transformation of ¹³C-glucuronic acid and native SOM, we find that coprecipitation suppresses

SUBMITTER: ThomasArrigo LK 

PROVIDER: S-EPMC10308808 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature