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

Table 1

The color, durability in water, and specific surface area of HAp granules sintered at 600°C for 4 h.

Sample	Color	% mass of HAp disintegration in water		SBET (m^2/g)
		4 h	8 h
H2	White	15.4	26.5	67.6
H3	White	10	20	70.6
H4	Grey
H5	Grey