Equilibrium, Kinetics, and Thermodynamics of the Removal of Nickel(II) from Aqueous Solution Using Cow Hooves

Table 1

Isotherm parameters for the removal of Ni(II) by CH at different temperatures.

Isotherm	Parameter	Temperature (K)
		298	308	318
Langmuir	𝑞𝑚 (mgg^−1)	10.23	10.57	11.24
	𝐾𝐿 (Lmg^−1)	0.0574	0.4188	0.4134
	𝑅^2	0.6781	0.9230	0.9516
Freundlich	𝐾𝐹 (L1/𝑛 g^−1 mg1/𝑛)	0.8513	2.9187	3.059
	𝑛	1.6425	1.992	1.9286
	𝑅^2	0.9445	0.9921	0.9581
D-R	𝑞𝐷 (mgg^−1)	4.85	6.41	7.122
	𝐾𝐷 (mol^2KJ^−2)	−1.4508	−0.1024	−0.1181
	𝐸 (KJmol^−1)	0.587	2.209	2.058
	𝑅^2	0.7670	0.8488	0.9171