RESEARCH / A0023
Ascorbate-Promoted Whole-Cell Biocatalysis for Lithium Bio-Recovery from Spent LiFePO4 Cathodes
Read the original paper · 10.1021/acsnano.6c12587 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 5. Normalized (a) and LCF (b) of Fe K-edge XANES spectra of LFP, FP, amorphous FP, and 2-line Fh, as well as different (bio)leaching residues including the residues after leaching with culture medium without bacteria (bacteria-free), residues after bioleaching with two-step approach, residues after leaching in bacteria-free system with the addition of 25 mM AA (AA control), and residues after G. oxydans bioleaching of spent LFP powder with addition of 25 mM AA by two-step approach. Fe Mössbauer spectra (c) of 25 mM AA bioleaching residues, amorphous FP, and spent LFP powder. Adapted with permission from ref (20). Copyright 2025, Elsevier. The LCF results and the fit parameters of Fe Mössbauer spectra are shown in Tables S2 and S3 (in Supporting Information), respectively. Pulp density was 10.0 g L−1. “LFP”, “FP”, “2-line Fh”, and “AA” stand for lithium iron phosphate, iron phosphate, 2-line ferrihydrite, and ascorbic acid, respectively.