Adsorption Studies of Lead by Enteromorpha Algae and Its Silicates Bonded Material

Table 4

Thermal analysis of algae materials: Enteromorpha algae (E), Enteromorpha algae with adsorbed Lead (E-Pb), and Enteromorpha algae modified with sodium silicates (EM).

Sample	Peak (°C) (temperature range)	% Experimental mass loss	Enthalpy (J/g)
(E)	84.10	12.77	238.50
	174.82	3.34	8.22
	215.12	33.88	−17.31
	231.41	—	23.98
	442.21	16.22	541.42
	726.16	20.91	254.63
(E-Pb)	73.61	17.83	234.55
	169.58	—	19.72
	221.14	39.14	−30.03
	428.15	15.57	−7.14
	656.85	21.91	161.65
(EM)	(25–180)	4.0	—
	(180.0–750.0)	13.0	41.59
	290.56	—	—
	756.85	2.0	13.43