Table 2. Langmuir isotherm parameters.

Metal	Sorbent	Intercept	Slope	R2	Qmax(mg/g)	RL
						Lowest C0	Highest C0
Sr2+	HAP	9.4	0.030	0.73	33	0.99	0.23
	BHAP	1.3	0.021	0.96	47	0.96	0.058
Co2+	HAP	1.5	0.074	1.0	14	0.78	0.019
	BHAP	0.42	0.016	0.99	62	0.82	0.024