Effect of Sodium Benzenesulfonate on SO₄²⁻ Removal from Water by Polypyrrole-Modified Activated Carbon

Table 2

Isotherm parameters for the adsorption of SO₄²⁻ onto the pyrrole-FeCl₃·(6H₂O)-sodium benzenesulfonate-granular activated carbon.

T(K)	Langmuir model			Freundlich model
	qm(mg g^−1)	kL (L mg^−1)	R^2	n	kF (mg g^−1)	R^2
298	27.7778	0.0053	0.9977	3.8388	4.0257	0.9956
308	19.8413	0.0047	0.9977	2.5107	1.1574	0.9482
318	15.8730	0.0041	0.9933	2.4691	0.8464	0.9743