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(A) X-ray diffraction of dry ball-milled ashes (DBA; blue curve) and oxidized dry ball-milled ashes (oDBA; red curve); (B) Fourier-transform infrared (FTIR) spectra of DBA before and after H2O2 treatment; (C) thermogravimetric analysis (TGA) scans of un-oxidized and oxidized DBA.
