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Table 3

Thermodynamic parameters for the adsorption of Cu(II) and Pb(II) onto CMC-Bz

Parameters	Cu(II)	Pb(II)
−ΔH° (kJ mol⁻¹)	−26.27	−27.38
ΔS° (kJ mol⁻¹)	0.795	0.828
−ΔG° (kJ mol⁻¹)
308 K	−42.16	−44.49
313 K	−56.84	−60.30
318 K	−80.41	−86.26
328 K	−123.17	−134.33

Parameters	Cu(II)	Pb(II)
−ΔH° (kJ mol⁻¹)	−26.27	−27.38
ΔS° (kJ mol⁻¹)	0.795	0.828
−ΔG° (kJ mol⁻¹)
308 K	−42.16	−44.49
313 K	−56.84	−60.30
318 K	−80.41	−86.26
328 K	−123.17	−134.33