Table 2 Specific surface area and pore size analysis of biochar.

From: Passivation effect of modified biochar on cadmium in mining contaminated soil

Sample

Surface area (m2/g)

Pore volume (cm3/g)

Average pore diameter (nm)

T1

92.86 ± 0.975

0.051 ± 0.003

3.15 ± 0.003

T2

114.01 ± 5.679

0.073 ± 0.002

3.41 ± 0.012

T3

97.67 ± 5.636

0.063 ± 0.001

3.23 ± 0.028

  1. Note: biochar (T1), potassium-permanganate-modified biochar (T2), phosphoric-acid-modified biochar (T3). The values are presented as means ± standard deviations (n = 3).