Biosorption of Ni(II), Cr(III), and Co(II) from Solutions Using Acalypha hispida Leaf: Kinetics, Equilibrium, and Thermodynamics

Table 4

Thermodynamic parameters for the biosorption of Ni(II), Cr(III), and Co(II) onto Acalypha hispida leaf.

Metal ion	Δ𝐻^∘ ( kJ mol^−1)	Δ𝑆^∘ (J mol^−1 K^−1)	A (kJ mol^−1) (303 K)	A (kJ mol^−1) (318 K)
Ni(II)	4.63	17.029	7.15	7.32
Cr(III)	8.26	29.336	10.77	10.94
Co(II)	6.95	16.199	9.47	9.64