Fig. 5: Stability and magnetism of chromite.
From: Back to chromite as a mineralogical strategy for long-term chromium pollution control
a Stratification of bacteria-mineral-soil following S. MR-1 treatment of Cr-contaminated sites. b Microbial remediation of Cr-contaminated sites leading to chromite formation. More than 10 independent images were captured by TEM in each experiment and they all have similar results, and the displayed images in b are without any selection bias. c Cr XPS analysis of soil samples before remediation, immediately after remediation, and following 180 days of air exposure post-remediation. The binding energies corresponding to CrVI 2p1/2 and CrVI 2p3/2 are typically located at 589.1 and 579.8 eV, respectively. The binding energies corresponding to CrIII 2p1/2 and CrIII 2p3/2 are typically located at 587.1 and 577.3 eV, respectively. d Time-dependent variation in Cr(III) concentration dissolved from chromite in solution of pH 7, synthesized by various abiotic methods. The gray dashed line represents the maximum total Cr concentration allowed by national standards for industrial wastewater discharge. e Magnetism of precipitates under different conditions. Source data are provided as a Source Data file.
