电化法研究壳聚糖树脂与游离酸的相互作用

利用电化实验技术，跟踪观察交联壳聚糖树脂吸附低浓度游离酸的行为，讨论了酸和甲醇浓度等因素对吸附的影响，利用固-液相互作用方程，求取吸附剂一吸附质相互作用能。实验结果表明，交联壳聚糖树脂吸附低浓度游离酸的过程是遵循单分子层机制进行的，表观吸附速率常数随着吸附质浓度和外加甲醇含量的增大而减小，表观吸附速率常数与吸附剂一吸附质相互作用能（U）存在线性相关。     

电导法研究树脂与游离酸的相互作用

利用电导实验技术跟踪树脂吸附游离酸的行为 ,讨论了外加盐和乙醇等因素对吸附的影响 ,利用固 -液相互作用方程求取吸附剂 -吸附质相互作用能。实验结果表明 ,树脂吸附游离酸 ,其表观吸附速率常数随着外加盐离子浓度的增大而减少 ;表观吸附速率常数与吸附剂 -吸附质相互作用能存在线性关系。     

不同反离子类型D354树脂吸附游离酸性能研究

利用吸附质-分子探针-电导法,研究吸附过程的特性,讨论不同类型反离子的变形性和离子势对D354树脂吸附游离酸的影响。根据固-液相互作用方程求取吸附剂-吸附质相互作用能（U）,实验结果表明,D354树脂吸附低浓度游离酸的过程遵循单分子层机理。吸附剂-吸附质相互作用能制约表观吸附速率常数（k）,k、U两者存在线性相关性。     

流动注射分光光度法研究壳聚糖树脂吸附阴离子染料

利用流动注射分光光度法技术，跟踪观察交联壳聚糖树脂吸附阴离子染料的行为，讨论了外加氯化钠或甲醇以及温度等因素对吸附的影响。利用固－液相互作用方程，求取了吸附剂－吸附质相互作用能。实验结果表明，交联壳聚糖树脂吸附 子染料，其表观吸附速率常数随体系中氯化钠浓度或甲醇含量的增大而减小，随温度的升高而增大；交联壳聚糖树脂吸附酸性铬蓝K染料的表观活化能力26.095kJ/mol。     

基于吸附质-分子探针的阴离子聚合物微球吸附性能研究

制备了SO42-、NO3-、ClO4-和F-、Cl-、Br-、I-两种新型阴离子苯乙烯-二乙烯苯聚合物微球,基于吸附质-分子探针电导法,研究了阴离子聚合物吸附低浓度游离酸的性能,考察了阴离子类型和温度对吸附行为的影响。实验结果表明,在30℃时,吸附游离酸的过程,遵循单分子层机理进行吸附。吸附剂-吸附质相互作用能U制约表观吸附速率常数K,两者存在线性相关性,K、U均随阴离子的离子势增大呈逐渐减小的趋势。吸附过程为吸热的,吸附焓变ΔH为10.87 kJ.mol-1。吸附过程谱维数ds增大,导致表观吸附速率常数降低。吸附质对吸附剂的亲和能Ua随吸附质-吸附剂相互作用参数K2增大而减小。     

3-N-乙酰基-2-取代芳基-5-[5''-甲基-异噁唑-3'']-Δ3-1,3,4－噁唑啉类化合物的合成

保护氨基的壳聚糖微球经环氧氯丙烷交联得到不溶于酸的吸附剂，与氯乙酸在碱性条件下反应，合成了羧甲基壳聚糖树脂，并用FT-IR对树脂进行了表征。其吸附Pb^2 的实验结果表明，在1h内有最快的吸附速率，吸附受pH值影响。在pH=5时，对Pb^2 的吸附量为1．12mmol／g，比壳聚糖树脂提高了70％。     

外界环境对弱碱性阴离子树脂吸附游离酸的影响

利用电导实验技术跟踪弱碱性阴离子树脂吸附低浓度游离酸的行为 ,研究了外加盐和醇等介质对吸附的影响。实验结果表明 ,弱碱性阴离子树脂吸附低浓度游离酸 ,其吸附速率随外加盐和醇的增加而减小     

胺基修饰的高度交联聚苯乙烯树脂对间苯二酚吸附行为研究

研究了AH系列胺基修饰的超高交联树脂对水溶液中间苯二酚的静态吸附行为特征,结果表明,它们对间苯二酚的吸附容量明显高于母体交联树脂NDA-100和大孔弱碱性阴离子交换树脂D301.AH系列树脂与吸附质分子之间不仅有范德华作用力,还存在着氢键等作用力.该类树脂对间苯二酚的吸附为自发的放热过程,属于以物理作用为主兼有弱化学作用的吸附过程.吸附速率符合准一级动力学方程,表观吸附速率常数随树脂胺基含量的升高而降低.     

氨基膦酸螯合树脂吸附重稀土的研究

研究了重稀土在氨基膦酸树脂的吸附行为.试验结果表明,氨基膦酸树脂对重稀土的吸附在pH=5.0的HAc-NaAc缓冲溶液时最佳;298K时静态饱和吸附容量为332mg/g干树脂;用2mol/L盐酸洗脱,洗脱率为91.2%;等温吸附服从Freundlich经验式;吸附反应中△H=10.76kJ/mol,表观速率常数k298=1.223×10-4s-1,表观活化能Ea=3.2kJ/mol.     

一种新型甘油三酯吸附剂的制备及其对血清中甘油三酯的吸附性能研究

合成了一种新型的甘油三酯吸附剂-磺化羟乙基化交联壳聚糖，用其对血浆中甘油三酯进行吸附．实验结果表明，该吸附剂最高可使血清中的甘油三酯降低76．9％（每克树脂吸附量为6．25mg），而对血清中总蛋白（TP）的吸附较少．     

THE EFFECT OF MEDIUM ON ADSORPTION OF FREE ACID BY CROSSLINKED CHITOSAN RESIN

The adsorption of free acid of low concentration by crosslinked chitosan resin was followed by electrochemical experimental technique.The effect of acid concentration and the media on adsorption was discussed.The experimental results show that both the apparent rate constant and the interaction energy between the adsorbent and adsorbate are decreased while the concentration of hydrochloric acid is increased.In the adsorption system.the adsorption was effected by addiiton of organic solvent.     

Adsorption of uranium ions by crosslinked polyester resin functionalized with acrylic acid from aqueous solutions

In this paper, the crosslinked polyester resin containing acrylic acid functional groups was used for the adsorption of uranium ions from aqueous solutions. For this purpose, the crosslinked polyester resin of unsaturated polyester in styrene monomer (Polipol 353, Poliya) and acrylic acid as weight percentage at 80 and 20%, respectively was synthesized by using methyl ethyl ketone peroxide (MEK_p, Butanox M60, Azo Nobel)-cobalt octoate initiator system. The adsorption of uranium ions on the sample (0.05 g copolymer and 5 mL of U(VI) solution were mixed) of the crosslinked polyester resin functionalized with acrylic acid was carried out in a batch reactor. The effects of adsorption parameters of the contact time, temperature, pH of solution and initial uranium(VI) concentration for U(VI) adsorption on the crosslinked polyester resin functionalized with acrylic acid were investigated. The adsorption data obtained from experimental results depending on the initial U(VI) concentration were analyzed by the Freundlich, Langmuir and Dubinin–Radushkevich (D–R) adsorption isotherms. The adsorption capacity and free energy change were determined by using D–R isotherm. The obtained experimental adsorption data depending on temperature were evaluated to calculate the thermodynamic parameters of enthalpy (ΔH°), entropy (ΔS°) and free energy change (ΔG°) for the U(VI) adsorption on the crosslinked polyester resin functionalized with acrylic acid from aqueous solutions. The obtained adsorption data depending on contact time were analyzed by using adsorption models such as the modified Freundlich, Elovich, pseudo-first order and pseudo-second-order kinetic models.     

A STUDY ON THE ADSORPTION OF LOW CONCENTRATION FREE ALKALI BY SUBACID RESIN

The absorption of free alkali at low concentration by subacid resin was traced with electric conductance method,the effect of temperature on the adsorption,the activation energy of adsorption (Ea) and interaction energy(U) was studied.The result showed that,the process of low concentration alkali adsorption by subacid resin was in accordance with mechanism of monomolecular layer absorption,in addition,with the increasing of temperature,the interaction energy between adsorbate and sorbent increase,so did the surface adsorption rate(k),and linear correlation existed between interaction energy(U) and temperature(T).     

A STUDY ON THE ADSORPTION OF LOW CONCENTRATION FREE ALKALI BY SUBACID RESIN

1. INTRODUCTIONIn the purification process of food, drug, and biological products, usually the material to be purified were not neutral. Application of traditional neutralization method with acid or alkali could increase electrolyte content in the material to be purified. Due to the capability of the adsorption of free alkali by subacid resin, the defect of electrolyte absorption in neutralization could be avoided when used in the purification of food, drug, and biological products [1]. H…     

ADSORPTION OF MACROPOROUS PHOSPHONIC ACID RESIN FOR INDIUM

The adsorption kinetics and mechanism of a nrovel chelate resin, macroporous phosphonic acid resin (PAR) for In(Ill) were investigated Tile statically saturated adsorption capacity is 216mg·g^-1resin at 298K in HAc-NaAc medium. Tire apparent adsorption rate constant is k298=4.84×10^-5 s^-1. Tile adsorption behavior of PAR for In(Ill) obeys the Freundlich isotherm. The thermodynamic adsorption parameters, enthalpy change △H, free energy change △G and entropychange △S of PAR for In(Ⅲ) are 11.5kmol, -12.6kJmol and 80.8Jmol.K, respectively. The apparent activation energy is Ea=3.5k.l/mol. Tire molar coordination ratio of the functional group of PAR to In(Ⅲ) is about 3:1.     

离子交换树脂吸附乙酰丙酸的动力学研究

研究了大孔弱碱性树脂D310对乙酰丙酸的静态吸附动力学特征.采用批式离子交换法,考察了树脂粒径、溶液浓度、搅拌速率、温度对交换过程的影响,并用动边界模型对乙酰丙酸的离子交换过程进行了描述..结果表明,离子交换过程的控制步骤为颗粒扩散控制,搅拌速率和反应温度对交换速率无显著影响,吸附速率随乙酰丙酸初始浓度的增加而升高.交换过程的反应速率常数k0为0.8315,反应级数n为0.5313,表观活化能Ea为9.504kJ/mol,并得到了动力学总方程式.