巯基树脂吸附银的行为及机理

引　言将性能优良的配位基连在高分子骨架上 ,并应用于催化、吸附、稀有金属回收等方面 ,是高分子配位化学发展的一个重要趋向[1～ 5] .含S配位原子的螯合树脂在一定条件下对贵金属有特殊的吸附作用[6,7] ,在分离、富集贵金属等方面有广阔的应用前景 .本文研究了巯基树脂对银的     

Adsorption of XSD-296 resin for Cr（Ⅵ）

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.     

氨基膦酸树脂吸附铈的研究

研究了铈(Ⅲ)在氨基磷酸树脂上的吸附行为。试验结果在pH5.0时,静态饱和吸附容量为197mg/g干树脂;用2mol.L-1HCl洗脱,洗脱率为98.1%;表观速率常数k298=2.71×10-5s-1;等温吸附服从Freundlich经验式;吸附反应中的△Ho=50.0kJ.mol-1,△So=286J.mol-1.K-1,△Go=-35.1kJ.mol-1。树脂功能基与Ce3+的配比为2∶1;并用红外光谱探讨了树脂与铈的成键。     

4—氨基—三氮唑树脂对钼（Ⅵ）的吸附性能及其机理研究

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     

氨基膦酸树脂吸附镝的研究①

研究了氨基膦酸树脂对镝(Ⅲ)的吸附性能及其机理。在pH4.5～5.7的HAc-NaAc体系中该树脂对镝有较好的吸附性能;静态吸附饱和容量为每g树脂238mg;用2mol     

4-氨基吡啶树脂吸附铬(VI)的研究

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。     

大孔膦酸树脂吸附铈的研究

本文对大孔膦酸树脂吸附柿的性能及其机理进行了研究。发现ｐＨ＝４．６时，静态饱和吸附容量为２２３．８ｍｇ／ｇ·树脂，用０．６ｍｏｌ／ＬＮａＣｌ－０．２ｍｏｌ／ＬＨＣｌ溶液定量洗脱；等温吸附服从Ｆｒｅｕｎｄｌｉｃｈ经验式；吸附反应中的△Ｈ＝１４．７８ｋＪ／ｍｏｌ，△Ｇ＝－３６．８６ｋＪ／ｍｏｌ和△Ｓ＝１７３．２９Ｊ／ｍｏｌ·Ｋ。化学分析表明，吸附物中树脂功能基与Ｃｅ（Ⅱ）的配位比为３：１。用红外光谱探讨了吸附反应机理。     

钇在大孔膦酸树脂上的吸附行为及其机理

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ＨＡｃＮａＡｃ介质中吸附Ｙ（Ⅲ）的研究未见报道。本文研究...     

D318阴离子交换树脂对铼（VII）的吸附

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.     

Adsorption and desorption properties of D318 resin for Cr（Ⅵ）

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