Langmuir and Freundlich adsorption isotherm parameters.

Adsorbent	Langmuir model			Freundlich model
	Q m (mg g−1)	K L (L mg−1)	R 2	K f (mg1−1/n L−1/n g−1)	1/n	R 2
Pure PUS	2.49	0.00726	0.994	0.225	0.340	0.986
PB@PUS-1	34.9	0.00143	0.999	0.508	0.528	0.984
PB@PUS-2	49.2	0.00182	0.999	0.969	0.498	0.976
PB@PUS-3	68.6	0.00221	0.998	1.64	0.481	0.965