Fe₂O₃/biochar chemicals elements determined by EDS analysis.

Element	Line s.	Mass (%)	Mass norm. (%)	Atom (%)
C	K-serie	74.63	50.77	68.75
O	K-serie	33.79	22.99	23.37
Al	K-serie	0.12	0.08	0.05
P	K-serie	0.03	0.02	0.01
S	K-serie	0.88	0.60	0.31
Ca	K-serie	1.07	0.73	0.29
Fe	K-serie	36.48	24.82	7.23
		147.00	100.00	100.00