Adsorption Characteristics and Transport Behavior of Cr(VI) in Shallow Aquifers Surrounding a Chromium Ore Processing Residue (COPR) Dumpsite

Table 2

Isotherm parameters for adsorption of Cr(VI) in different aquifers at different temperatures.

Aquifers	Temperature (K)	Langmuir model			Freundlich model
		KL (L/kg)	qm (mg/kg)	R^2	KF (L/kg)	n	R^2
Clay	288	0.057	28.33	0.907	1.438	0.751	0.991
	298	0.052	40.00	0.892	1.830	0.776	0.988
	308	0.052	49.26	0.887	2.230	0.784	0.986
Silty clay	288	0.070	20.45	0.939	1.199	0.749	0.987
	298	0.057	30.86	0.942	1.523	0.775	0.9891
	308	0.055	39.37	0.934	1.865	0.783	0.986
Silt	288	0.071	16.89	0.939	1.002	0.749	0.987
	298	0.061	22.47	0.946	1.154	0.774	0.9891
	308	0.056	32.68	0.956	1.573	0.778	0.986