Table 2.

Thermodynamics parameter without the tungsten lamp.

Adsorbing Material	Dye	Temp (K)	KL	∆H° (KJ mol−1)	∆S° (J mol−1K−1)	∆G° (KJ mol−1)	R2
Cu/Ni/rGO composite	Rhodamine B	298	1.31	34.35	120.03	−0.67	0.77
		308	3.16			−2.95
		318	6.36			−4.89
		328	6.45			−5.08
		338	6.92			−5.43
Cu/Ni/rGO composite	Alizarin Red	298	1.13	33.29	114.13	−0.31	0.84
		308	2.02			−1.80
		318	4.33			−3.87
		328	5			−4.38
		338	5.14			−4.60