Fabrication of Porous Hydroxyapatite Granules as an Effective Adsorbent for the Removal of Aqueous Pb(II) Ions

Table 2

The effect of sintering temperature on the color, durability in water, and specific surface area of H₃ granules.

Temperature (°C)
400			600				700
Color	% mass		Color	% mass		SBET (m^2/g)	Color	% mass		SBET (m^2/g)
Black	4 h	8 h	White	4 h	8 h	70.6	White	4 h	8 h	73.0
	26	43		10	20			8	16.8