. 2023 Sep 5;9(9):e19831. doi: 10.1016/j.heliyon.2023.e19831

Table 5.

The atomic ratio of DBC biochar obtained from different pyrolysis temperatures.

Parameters	DBC-400	DBC-450	DBC-500	DBC-550
O/C	0.14 ± 0.003^a	0.11 ± 0.003^b	0.05 ± 0.002^d	0.06 ± 0.002^c
H/C	0.71 ± 0.004^a	0.63 ± 0.003^b	0.45 ± 0.003^d	0.52 ± 0.002^c
(O + N)/C	0.15 ± 0.003^a	0.11 ± 0.003^b	0.05 ± 0.001^d	0.06 ± 0.002^c
C/N	295.69 ± 1.223^a	238.06 ± 1.129^b	202.71 ± 1.135^c	205.16 ± 1.222^c

Remark: Data are presented as mean ± SD with a harmonic mean sample size of 4.0. Letters (a, b, c, and d) represent statistically significant differences between the data set at p < 0.05.