Effect of Alkali Treatment of Wheat Straw on Adsorption of Cu(II) under Acidic Condition

Table 1

Isotherm parameters obtained for the adsorption of Cu(II) onto wheat straw at different initial concentrations and temperature.

Isotherm models	Isotherm parameters
	UWS			AWS
(K)	288	298	308	288	298	308
Langmuir
	6.883	7.137	7.687	8.390	8.980	9.860
(mg/g)	10.111	10.238	10.801	10.589	10.680	10.783
(L/mg)	0.017	0.0187	0.0199	0.0316	0.0606	0.157
	0.993	0.994	0.984	0.993	0.979	0.966
Freundlich
(mg/g)	0.421	0.475	0.537	0.824	1.747	1.998
	0.591	0.576	0.567	0.502	0.357	0.351
	0.994	0.993	0.992	0.995	0.987	0.984