File Name : figures1_microct_magnetite.tif

Caption : figure s1. microct of mt mineralized composite showing distribution of fe within the lignocellulose scaffold. a) slice in the axial direction showing mt distribution primarily at the interface of vessels of the wood structure. b,c,d) radial slices showing mt at different heights of the filter.

File Name : figures2_xrd.tif

Caption : figure s2. powder x-ray diffraction of wood composite materials with ferrihydrite (a) and magnetite (b). pronounced bragg reflections from the semicrystalline cellulose iβ in balsa wood overshadow the xrd peaks from the mineral phases. miller indices of cellulose are shown on each respective plot.

File Name : figures3_ft-ir.tif

Caption : figure s3. ft-ir spectra of balsa wood before and after modification with ferrihydrite. bands attributed fe-oh bending (825cm-1) and fe-o stretching (1558cm-1) are characteristic of 2-line ferrihydrite.