The adsorption behavior and mechanism of a novel chelate resin, iminodiacetic acid resin (IDAAR) for Y? were investigated. The statically saturated adsorption capacity is 102mg· g- 1 resin at 298K in HAc NaAc med...The adsorption behavior and mechanism of a novel chelate resin, iminodiacetic acid resin (IDAAR) for Y? were investigated. The statically saturated adsorption capacity is 102mg· g- 1 resin at 298K in HAc NaAc medium at pH 5.7. Y? adsorbed on IDAAR can be reductively eluted by 1.0～ 4.0mol· L- 1 HCl used as eluant and the elution percentages are almost as high as 100% . The resin can be regenerated and reused without apparent decrease in adsorption capacity. The apparent adsorption rate constant is k298=3.36× 10- 5s- 1. The adsorption behavior of IDAAR for Y? conforms to Freundlich′ s model reasonably. The thermodynamic adsorption parameter, enthalpy change Δ H of IDAAR for Y? is 18.6kJ· mol- 1. The complex molar ratio of the functional group of IDAAR to Y? is about 3∶ 1. The adsorption mechanism of IDAAR for Y? was examined by using chemical method and IR spectrometry.展开更多
The adsorption behavior and mechanism of a novel chelate resin, diglycolamidic acid resin (DAAR) for Er(Ⅲ) were investigated. The optima adsorption condition of DAAR for Er(Ⅲ) is pH 6.20 in HAc NaAc medium. The sta...The adsorption behavior and mechanism of a novel chelate resin, diglycolamidic acid resin (DAAR) for Er(Ⅲ) were investigated. The optima adsorption condition of DAAR for Er(Ⅲ) is pH 6.20 in HAc NaAc medium. The statically saturated adsorption capacity is 189 mg·g -1 resin at 298 K. The Er (Ⅲ) adsorbed on DAAR can be eluted reaching 100% by 2 mol·L -1 HCl used as eluant. The resin can be regenerated and reused without apparent decreasing of adsorption capacity. The apparent adsorption rate constant is k 298 =1.94×10 -5 s -1 . The apparent activation energy is 24.7 kJ·mol -1 . The adsorption behavior of DAAR for Er(Ⅲ) obeys the Freundlich isotherm. The thermodynamic adsorption parameters, enthalpy change Δ H of DAAR for Er(Ⅲ) is 24.1 kJ·mol -1 . The molar coordination ratio of the functional group of DAAR to Er (Ⅲ) is 3∶1. The adsorption mechanism of DAAR for Er (Ⅲ) was examined by using chemical method and IR spectrometry. The coordination compound is formed between oxygen atoms in the functional group of DAAR and Er(Ⅲ).展开更多
The adsorption behavior and the mechanism of a novel chelate resin, amino methylene phosphonic acid resin(APAR) for Cu(Ⅱ) were investigated. Cu(Ⅱ) was quantitatively adsorbed by APAR in the medium of pH=4 09. The s...The adsorption behavior and the mechanism of a novel chelate resin, amino methylene phosphonic acid resin(APAR) for Cu(Ⅱ) were investigated. Cu(Ⅱ) was quantitatively adsorbed by APAR in the medium of pH=4 09. The statically saturated adsorption capacity is 181 mg/(g resin). Cu(Ⅱ) adsorbed on APAR can be eluted by 1 0-3 0 mol/L HCl. The rate constant is k 298 =5 58×10 -5 s -1 . The adsorption of Cu(Ⅱ) on APAR follows the Freundlich isotherm. The Δ H of the adsorption is 3 91 kJ/mol. The apparent activation energy is E a=21 4 kJ/mol. The coordination molar ratio of APAR to Cu(Ⅱ) is 1/1. It is shown that the nitrogen and the oxygen atoms in the functional group of APAR coordinate to Cu(Ⅱ).展开更多
In this paper the sorption behavior of Yb(Ⅲ) onto the macroporous phosphonic acid resin (MPAR) is reported.Experimental results show that the statically saturated sorption capacity is 328 mg/g·resin;Yb(Ⅲ) adsor...In this paper the sorption behavior of Yb(Ⅲ) onto the macroporous phosphonic acid resin (MPAR) is reported.Experimental results show that the statically saturated sorption capacity is 328 mg/g·resin;Yb(Ⅲ) adsorbed on MPAR can be eluted by 1mol·L -1 HCl,elution percentage is 91.5%.The apparent rate constant is k 298 = 4.63×10 -5 s -1 .The sorption behavior of MPAR for Yb(Ⅲ) abides the Freundlich isotherm.The themodynamic parameter of sorption:enthalpy change ΔH for Yb(Ⅲ) is 50.4kJ·mol -1 .The coordination molar ratio of the functional group of MPAR to Yb(Ⅲ) is 3∶1.The bondforming conditions of MPAR for Yb(Ⅲ) is examined by IR spectrometry.展开更多
文摘The adsorption behavior and mechanism of a novel chelate resin, iminodiacetic acid resin (IDAAR) for Y? were investigated. The statically saturated adsorption capacity is 102mg· g- 1 resin at 298K in HAc NaAc medium at pH 5.7. Y? adsorbed on IDAAR can be reductively eluted by 1.0～ 4.0mol· L- 1 HCl used as eluant and the elution percentages are almost as high as 100% . The resin can be regenerated and reused without apparent decrease in adsorption capacity. The apparent adsorption rate constant is k298=3.36× 10- 5s- 1. The adsorption behavior of IDAAR for Y? conforms to Freundlich′ s model reasonably. The thermodynamic adsorption parameter, enthalpy change Δ H of IDAAR for Y? is 18.6kJ· mol- 1. The complex molar ratio of the functional group of IDAAR to Y? is about 3∶ 1. The adsorption mechanism of IDAAR for Y? was examined by using chemical method and IR spectrometry.
文摘The adsorption behavior and mechanism of a novel chelate resin, diglycolamidic acid resin (DAAR) for Er(Ⅲ) were investigated. The optima adsorption condition of DAAR for Er(Ⅲ) is pH 6.20 in HAc NaAc medium. The statically saturated adsorption capacity is 189 mg·g -1 resin at 298 K. The Er (Ⅲ) adsorbed on DAAR can be eluted reaching 100% by 2 mol·L -1 HCl used as eluant. The resin can be regenerated and reused without apparent decreasing of adsorption capacity. The apparent adsorption rate constant is k 298 =1.94×10 -5 s -1 . The apparent activation energy is 24.7 kJ·mol -1 . The adsorption behavior of DAAR for Er(Ⅲ) obeys the Freundlich isotherm. The thermodynamic adsorption parameters, enthalpy change Δ H of DAAR for Er(Ⅲ) is 24.1 kJ·mol -1 . The molar coordination ratio of the functional group of DAAR to Er (Ⅲ) is 3∶1. The adsorption mechanism of DAAR for Er (Ⅲ) was examined by using chemical method and IR spectrometry. The coordination compound is formed between oxygen atoms in the functional group of DAAR and Er(Ⅲ).
基金Supported by Zhejiang Provincial Natural Science Foundation of China( No.2 0 0 0 72 )
文摘The adsorption behavior and the mechanism of a novel chelate resin, amino methylene phosphonic acid resin(APAR) for Cu(Ⅱ) were investigated. Cu(Ⅱ) was quantitatively adsorbed by APAR in the medium of pH=4 09. The statically saturated adsorption capacity is 181 mg/(g resin). Cu(Ⅱ) adsorbed on APAR can be eluted by 1 0-3 0 mol/L HCl. The rate constant is k 298 =5 58×10 -5 s -1 . The adsorption of Cu(Ⅱ) on APAR follows the Freundlich isotherm. The Δ H of the adsorption is 3 91 kJ/mol. The apparent activation energy is E a=21 4 kJ/mol. The coordination molar ratio of APAR to Cu(Ⅱ) is 1/1. It is shown that the nitrogen and the oxygen atoms in the functional group of APAR coordinate to Cu(Ⅱ).
文摘In this paper the sorption behavior of Yb(Ⅲ) onto the macroporous phosphonic acid resin (MPAR) is reported.Experimental results show that the statically saturated sorption capacity is 328 mg/g·resin;Yb(Ⅲ) adsorbed on MPAR can be eluted by 1mol·L -1 HCl,elution percentage is 91.5%.The apparent rate constant is k 298 = 4.63×10 -5 s -1 .The sorption behavior of MPAR for Yb(Ⅲ) abides the Freundlich isotherm.The themodynamic parameter of sorption:enthalpy change ΔH for Yb(Ⅲ) is 50.4kJ·mol -1 .The coordination molar ratio of the functional group of MPAR to Yb(Ⅲ) is 3∶1.The bondforming conditions of MPAR for Yb(Ⅲ) is examined by IR spectrometry.
