Atomic insights into the mechanisms of Al³⁺ or Cr³⁺ affecting ferrihydrite nucleation.

ABSTRACT: Various exotic metal cations commonly coexist with ferrihydrite nanoparticles in natural environments. Lack of knowledge about the metal cations effects on ferrihydrite nucleation and growth greatly blights the deep understanding of ferrihydrite mineralogical properties and reactivities, and thus the fates of associated nutrients, heavy metals/metalloids, and organic pollutants. Here, the nucleation processes and mechanisms of ferrihydrite nanoparticles in the presence of Al³⁺ or Cr³⁺ were studied by combining visible spectroscopy, in situ quick X-ray absorption fine structure spectroscopy and quantum chemical calculations. The formation of ferrihydrite can be divided into three stages. In stage 1, Fe(H₂O)₆³⁺ forms μ-oxo Fe dime

SUBMITTER: Li W 

PROVIDER: S-EPMC10483270 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature