Changes in Dissolved Natural Organic Matter Composition Induced by Reaction with U(VI) at Acidic and Neutral pH.

ABSTRACT: Understanding oxidized uranium [U(VI)] reactions with natural organic matter (NOM) is necessary to predict the solubility and mobility of U and NOM in waters from organically rich geologic uranium deposits influenced by natural and anthropogenic processes. Here, we investigated the changes in the chemical composition of NOM resulting from its reaction with U(VI) under acidic and neutral pH under controlled laboratory conditions. We employed a multianalytical approach, including X-ray photoelectron spectroscopy (XPS), Fourier transform ion cyclotron resonance-mass spectrometry (FTICR-MS), transmission electron microscopy (TEM), and X-ray absorption spectroscopy (XAS). Results revealed that U(VI) reaction at acidic pH led to a decrease in the relative content of alcohols, carboxylic function

SUBMITTER: Velasco CA 

PROVIDER: S-EPMC12395383 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature