The adsorption characteristics of Ui O-66(a Zr-containing metal–organic framework formed by terephthalate)for Rhodamine B(Rh B), such as isotherms, kinetics and thermodynamics, were investigated systematically.The ba...The adsorption characteristics of Ui O-66(a Zr-containing metal–organic framework formed by terephthalate)for Rhodamine B(Rh B), such as isotherms, kinetics and thermodynamics, were investigated systematically.The batch adsorption data conform well to the Langmuir and Freundlich isotherms. The adsorption kinetics of Ui O-66 for Rh B can be well described by the pseudo first-order model, and the adsorption thermodynamic parameters ΔG0, ΔH0and ΔS0at 273 K are- 6.282 k J·mol-1, 15.096 k J·mol-1and 78.052 J·mol-1·K-1, respectively. The thermodynamic analyses show that the adsorption process of Rh B on Ui O-66 is more favorable at higher temperatures. Ui O-66 can be regenerated by desorbing in DMF solution with ultrasonic for 1 h. Ui O-66 can keep good performance for at least six cycles of sorption/desorption.展开更多
文摘The adsorption characteristics of Ui O-66(a Zr-containing metal–organic framework formed by terephthalate)for Rhodamine B(Rh B), such as isotherms, kinetics and thermodynamics, were investigated systematically.The batch adsorption data conform well to the Langmuir and Freundlich isotherms. The adsorption kinetics of Ui O-66 for Rh B can be well described by the pseudo first-order model, and the adsorption thermodynamic parameters ΔG0, ΔH0and ΔS0at 273 K are- 6.282 k J·mol-1, 15.096 k J·mol-1and 78.052 J·mol-1·K-1, respectively. The thermodynamic analyses show that the adsorption process of Rh B on Ui O-66 is more favorable at higher temperatures. Ui O-66 can be regenerated by desorbing in DMF solution with ultrasonic for 1 h. Ui O-66 can keep good performance for at least six cycles of sorption/desorption.