. 2026 Apr 25;16:18336. doi: 10.1038/s41598-026-49951-9

Table 2.

BET surface area analysis data.

Biochar type	BET Surface area (m²/g)	Total pore volume (cm³/g)	Average pore diameter (nm)	Particle size distribution	True density (g cm^–3)
RSB	11.06	0.042	8.63	D₅₀ ~ 90–120 μm D₉₀ ~ 280–340 μm	0.72 ± 0.05
PRSB	37.31	0.027	2.306	D₅₀ ~ 70–80 μm D₉₀ ~ 150–180 μm	0.86 ± 0.04

Biochar type

BET Surface area (m²/g)

Total pore volume (cm³/g)

Average pore diameter (nm)

Particle size distribution

True density (g cm^–3)

RSB

11.06

0.042

8.63

D₅₀ ~ 90–120 μm

D₉₀ ~ 280–340 μm

0.72 ± 0.05

PRSB

37.31

0.027

2.306

D₅₀ ~ 70–80 μm

D₉₀ ~ 150–180 μm

0.86 ± 0.04