Recovery of Palladium from Acidic Solution Using Polyethylenimine-Crosslinked Calcium Silicate Hydrate Derived from Oyster Shell Waste: Adsorption and Mechanisms

Table 1

Isotherm parameters of Pd(II) adsorption onto PEI-CSH.

Models	Parameter	Value
Langmuir	(mg/g)	156.03
	(L/mg)	0.2344
		0.994
Freundlich	(L/g)	46.34
		4.47
		0.913
Sips	(mg/g)	156.68
	(L/mg)	0.2374
		1.0288
		0.994
Redlich-Peterson	(L/g)	40.2145
	αR (L/mg)	0.3005
		0.9707
		0.991
Temkin	(L/mg)	5.1132
	(J/mol)	110.8861
		0.976