Table 5.

Thermodynamic parameters for adsorption of Cr(VI) on MS-HMS-PL (pH = 4.0, V = 20 mL, W = 5.0 mg, C_i = 5-200 mg L⁻¹, stirring rate = 190 rpm).

$\mathrm{\Delta }{\mathit{G}}_{\mathbf{a}\mathbf{d}\mathbf{s}.}^{\mathbf{o}}$ kJ mol−1
293 K	303 K	313 K	323 K	$\mathrm{\Delta }{\mathit{H}}_{\mathbf{a}\mathbf{d}\mathbf{s}.}^{\mathbf{o}}$ kJ mol−1	$\mathrm{\Delta }{\mathit{S}}_{\mathbf{a}\mathbf{d}\mathbf{s}.}^{\mathbf{o}}$ kJ mol−1 K−1
−29.28	−30.53	−31.78	−33.03	+7.29	+0.13