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Cr(Ⅵ) was quantitatively adsorbed by D201×4 resin with pH=2.63～3.66 in the medium of HAc NaAc.The statically saturated sorption capacity is 156.8mg/g·resin.The sorption rate constant is k 298 =1.80×10 -4 s -1 .The apparent sorption activation energy of APAR for Cr(Ⅵ) is 7.21kJ·mol -1 .The themodynamic parameters of sorption:enthalpy change ΔH,free energy change ΔG and entropy change ΔS of sorption (D201×4) for Cr(Ⅵ) are 33.12kJ·mol -1 ,-28.36kJ·mol -1 ,206.3J·mol -1 ·K -1 ,respectively.Coordination molar ratio of the functional group of D201×4 to Cr(Ⅵ) is 1∶1.Cr(Ⅵ) adsorbed on D201×4 can be reductively eluated by 5% NH 4Cl-10% NH 3·H 2O.The sorption rate of D201×4 for Cr(Ⅵ) is fast.The equilibrium time of adsorption is five hours.
Cr (VI) was quantitatively adsorbed by D201 × 4 resin with pH = 2.63 ~ 3.66 in the medium of HAc NaAc.The statically saturated sorption capacity is 156.8 mg / g · resin.The sorption rate constant is k 298 = 1.80 × 10 - 4 s -1. The apparent sorption activation energy of APAR for Cr (Ⅵ) is 7.21 kJ · mol -1. These themodynamic parameters of sorption: enthalpy change ΔH, free energy change ΔG and entropy change ΔS of sorption (D201 × 4) for Cr (Ⅵ) are 33.12kJ · mol -1, -28.36kJ · mol -1, 206.3J · mol -1 · K -1, respectively.Coordination molar ratio of the functional group of D201 × 4 to Cr (Ⅵ) is 1: 1.Cr (Ⅵ) adsorbed on D201 × 4 can be reductively eluted by 5% NH 4 Cl-10% NH 3 · H 2 O. The sorption rate of D201 × 4 for Cr (Ⅵ) is fast. of adsorption is five hours.