Dual-Electronic Nanomaterial (Synthetic Clay) for Effective Removal of Toxic Cationic and Oxyanionic Metal Ions from Water

Table 2

The corresponding parameters of the Langmuir and Freundlich models.

Unit		Cationic metals					Anionic metals
		Cu^2+	Cd^2+	Ni^2+	Pb^2+	Cr^3+	Cr2O7^2–	MnO4^–
(1) Langmuir model
	mmol/g	0.601	0.880	1.299	0.657	0.701	0.589	0.522
	L/mmol	0.493	0.742	1.630	1.546	1.072	1.282	0.602
Adj-	—	0.985	0.988	0.991	0.986	0.982	0.985	0.994
	(×1000)	0.428	0.766	1.760	0.410	0.761	0.508	0.143
SD	—	0.023	0.030	0.045	0.021	0.030	0.025	0.013
MPSD	—	4.41	3.86	4.68	2.85	4.14	3.84	2.31
BIC	—	–51.4	–61.2	–47.7	–82.1	–61.3	–50.3	–76.3
(2) Freundlich model
		0.205	0.384	0.724	0.414	0.371	0.351	0.209
	—	0.446	0.347	0.270	0.203	0.271	0.215	0.366
Adj-	—	0.953	0.983	0.961	0.937	0.949	0.950	0.959
	(×1000)	1.390	1.120	7.730	0.477	2.220	1.740	0.882
SD	—	0.041	0.036	0.095	0.022	0.050	0.046	0.032
MPSD	—	5.26	4.14	8.09	3.17	6.29	5.16	3.94
BIC	—	–43.3	–57.8	–35.8	–81.5	–51.6	–41.7	–60.0