Potential use of Ulva intestinalis-derived biochar adsorbing phosphate ions in the cultivation of winter wheat Tristicum aestivum

Bioresources and Bioprocessing

Table 2 Porous texture from mercury porosimetry

Sample	Total intrusion volume	Total pore area	Apparent (skeletal) density	Median pore diameter (area)	Average pore diameter (4 V/A)	Porosity
Sample	cm³/g	m²/g	g/cm³	nm	nm	%
B300	0.15	5.56	0.554	6.5	108	7.67
B500	0.20	8.72	0.496	6.1	94	9.18
B700	0.19	19.0	0.550	6.4	39	9.29
B700MgCl₂	0.71	16.5	0.408	19	173	22.6

4 V/A an equation, where V (volume) and A (area), according to the cylindrical pore