Phragmites karka as a Biosorbent for the Removal of Mercury Metal Ions from Aqueous Solution: Effect of Modification

Table 3

Values of thermodynamic parameters for the biosorption of mercury ions on the surface of natural P. karka and treated P. karka.

Biosorbent type	Temperature (K)	(Jmol^−1 K^−1)	(kJmol^−1)	(kJmol^−1)
Natural P. karka	293	+101.69	+26.688	−3.058
	303			−3.648
	313			−6.237
	323			−5.584
Treated P. karka	293	+94.62	+24.034	−3.476
	303			−4.464
	313			−6.573
	323			−5.927