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The adsorption properties of XSD-296 for Cr(Ⅵ) were studied by using chemical analysis and infrared spectrometry. Experimental results show that XSD-296 resin has a good adsorption ability for Cr(Ⅵ) at pH=2.6 in the HAc-NaAc medium. The statically saturated adsorption capacity is 235 mg/g resin. The apparent activation energy of adsorption reaction, Ea, is 16.73 kJ/mol, and the thermodynamic parameters are △H=11.62 kJ/mol, △G298 K=-4.13 kJ/mol. The adsorption behavior of resin for Cr(Ⅵ) is in accordance with Freundlich adsorption isotherm. Cr(Ⅵ ) adsorbed on resin can be eluted by 5%NaCl-5%NaOH or 5%NH4Cl-5%NH3-H2O quantitatively. Infrared spectra and adsorption mechanism show that the functional group of resin coordinates with Cr(Ⅵ) to form co-ordination compound. The coordination molar ratio of the functional group of resin to Cr(Ⅵ) is 1:1. 相似文献
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4—氨基—三氮唑树脂对钼(Ⅵ)的吸附性能及其机理研究 总被引:13,自引:2,他引:11
在Ph=5.0的Hac-NaAc体系中,4-氨基-三氮唑树脂(4-ATR)对Mo(Ⅵ)有较好的吸附性.静态饱和吸附容量As=189.5mg/g·R,用1~3moll-1Ha可以将吸附的Mo定量洗脱.298K测得吸附热力学参数△H=-27.3kJ·mol 相似文献
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钇在大孔膦酸树脂上的吸附行为及其机理舒增年熊春华郑玉华(丽水师范专科学校,丽水323000)关键词:大孔膦酸树脂钇吸附机理大孔膦酸树脂吸附某些金属离子的研究已见报道[1~3],然而用膦酸树脂在HAcNaAc介质中吸附Y(Ⅲ)的研究未见报道。本文研究... 相似文献
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4-氨基吡啶树脂吸附铬(VI)的研究 总被引:27,自引:5,他引:22
4-氨基毗啶树脂(4-APR)对CrQ(VI的吸附在pH=2时最佳,静态饱和吸附容量163.6mgCr(VI)/g树脂,用4.5molL-1NaOH溶液能洗脱。测得298K时表观吸附速率常数k298=6.25×10-4S-1。等温吸附遵循Freundlich曲线,吸附机理表明4-APR功能上的N与Cr(VI)发生配位键合,配位摩尔比为11。 相似文献
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The adsorption and mechanism of Re(VII) on resin D318 were studied using chemical methods and IR spectrometry. At pH 5.2, the static and dynamic saturation adsorption capacities were 351.4 and 366.5 mg&;#8226;g&;#61485;1, respectively. The adsorption behavior obeyed the Freundlich empirical equation and the adsorption rate constant k298 was 6.37×10&;#61485;4 s&;#61485;1. The desorption percentage was up to 99.7% when 2.0 mol&;#8226;L&;#61485;1 KSCN was used for dynamic desorption. 相似文献
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The adsorption capability of D318 resin for Cr(VI) was investigated by chemistry analysis. Experimental results show that
D318 resin has the best adsorption ability for Cr(VI) at pH=3.16 in HAc-NaAc medium. The statically saturated adsorption capacity
of the resin is 265.4 mg/g. The thermodynamic adsorption parameters, enthalpy change ΔH and free energy change ΔG
298 of the adsorption reaction are 4.81 and −5.16 kJ/mol, respectively. The apparent activation energy E
a is 22.4 kJ/mol. The adsorption behavior obeys the Freundlich isotherm. The molar coordination ratio of the functional group
of resin to Cr(VI) is 3:2. Cr(VI) adsorbed on D318 resin can be eluted by 5%NaOH-5%NaCl quantitatively.
Foundation item: Project (Y304121) supported by the Natural Science Foundation of Zhejiang Province, China 相似文献