Table 5.

Thermodynamic parameters for the adsorption of Zn(II), Cd(II), and Hg(II) on TLSB at different temperatures.

	Temperature/°C	ΔG0/(kJ/mol)	ΔH0/(kJ/mol)	ΔS0/(kJ/mol × K)
Zn(II)	20	− 0.986	+ 19.811	+ 0.053
	30	− 1.230
	43	− 1.908
	50	− 2.349
Cd(II)	20	− 2.206	+ 14.716	+ 0.049
	30	− 2.513
	40	− 2.897
	50	− 3.265
Hg(II)	20	− 0.763	+ 20.771	+ 0.077
	30	− 1.030
	40	− 1.692
	50	− 2.566
	55	− 3.104
	60	− 4.087