Skip to main content

Table 2 Thermodynamic parameters for the adsorption of Ni(II) ions onto NZVI-CNS

From: Nanoscale zero-valent iron-impregnated agricultural waste as an effective biosorbent for the removal of heavy metal ions from wastewater

Metal ions Concentration of Ni(II) ion solution (mg/L) H o(kJ/mol) S o(J/mol/K) G o (kJ/mol)
30 °C 40 °C 50 °C 60 °C
Ni(II) 25 −61.998 −162.94 −14.846 −10.327 −9.134 −8.143
50 −31.688 −73.52 −9.300 −8.936 −7.790 −7.226
75 −24.699 −55.76 −7.920 −7.152 −6.479 −6.312
100 −13.630 −25.12 −5.979 −5.782 −5.586 −5.200
150 −11.719 −22.15 −4.994 −4.761 −4.653 −4.288