笼形聚偕氨肟树脂的研究──Ag(Ⅰ)在树脂上的吸附过程

测定了Ag+离子在笼形聚偕胺肟树脂（CAO）及其酸、碱处理产物（ACAO、BCAO）上的吸附容量．Ag+离子在BCAO树脂上吸附容量较高,但同非选择性吸附,在ACAO上的吸附容量则与处理树脂的酸的pKa值有关．用高pKa值的硼酸、苯酸和对氨基酚处理所得的ACAO树脂的吸附容量接近BCAO树脂的水平,认为是胶后胺肟基发生互变异构所致．吸附动力学表明Ag+离子在H3BO3/ACAO和C6H5OH/ACAO树脂上进行多层吸附．在吸附中伴随有氧化还原反应并生成Ag（O）微晶的过程．     

纤维素基磁性聚偕胺肟树脂吸附锂

研究了氯化锂浓度、树脂含量和溶液的ＰＨ对碱式纤维素基磁性聚偕胺肟树脂吸附Ｌｉ＾＋离子能力的影响。在适当条件下，每个偕胺肟基可吸附两个Ｌｉ＾＋离子。     

笼形聚偕胺肟树脂的研究贵金属在RCO2H／ACAO树脂上的交换吸附

用羧酸处理的笼形聚偕胺肟树脂（ＲＣＯ２Ｈ／ＡＣＡＯ）吸附Ｐｄ（Ⅱ）、Ｉｒ（Ⅳ）、Ｐｔ（Ⅳ）、Ａｇ（Ⅰ）、Ａｕ（Ⅲ）离子的能力与羧酸性质有关，巯其乙酸／ＡＣＡＯ树脂对Ｐｄ（Ⅱ）、Ｉｒ（Ⅳ）和Ａｕ（Ⅲ）吸附容量较高，乙二酸／ＡＣＡＯ树脂则对Ａｇ（Ⅰ）和Ｐｔ（Ⅳ）离子有稍强的吸附能力。除Ｐｄ（Ⅱ）外，ＲＣＯ２Ｈ／ＡＣＡＯ树脂吸附贵金属离子的能力低于笼形聚偕胺肟树脂（ＣＡＯ）和碱处理笼形聚偕胺肟树脂（ＢＣ     

笼形聚偕胺肟树脂的研究—酚处理对树脂吸附贵金属性能的影响

研究了笼形聚偕胺肟树脂（CAO）和酸式（ACAO）及碱式（BCAO）树脂对于苯酚、对-氨基酚、对-硝基酚、对-甲氨基酚和对-苯二酚的吸附和吸留作用，测定了酚处理树脂的中和当量。它反映了笼形树脂吸留外来物的特性。酚处理树脂有效地吸附Ag 、AuCl4－、PtCl62-、PdCl42-和IrCl62-等贵金属离子，吸附方式似乎与溶液的pH值有关。SEM观察表明，Ag 、Au－Cl4-和IrCl62-离子在吸附过程中被还原为零价态，在树脂表面生成形态各异的结晶。     

笼形聚偕胺肟树脂的研究：卤素及其化合物在树脂上的吸附

考查了碱处理笼形聚偕胺肟树脂和乙酸，硝酸或盐酸处理的笼形聚偕胺肟树脂对卤化物，卤酸盐和卤素的吸附行为。发现ＢＣＡＯ和ＨＯＡｃ／ＡＣＡＯ不吸附卤化物和卤酸盐；ＨＮＯ３／ＡＣＡＯ和ＨＣｌ／ＡＣＡＯ对两类化合物表现出不同吸附能力。     

笼形聚偕胺肟树脂的研究─—卤素及其化合物在树脂上的吸附

考查了碱处理笼形聚偕胺肟树脂（BCAO）和乙酸、硝酸或盐酸处理的笼形聚偕胺肟树脂（HOAC／ACAO、HNO。／ACAO、HCI／ACAO）对卤化物、卤酸盐和卤素的吸附行为。发现BCAO和HOAC／ACAO不吸附卤化物和卤酸盐；HNO3/ACAO和HCl/ACAO对两类化合物则表现出不同的吸附能力。BCAO和ACAO均吸附溴和碘，并符合Freundlich和Langmuir等温吸附方程。研究了溴在BCAO上的吸附动力学，讨论了吸附机理。     

笼形聚偕胺肟树脂的研究──(NH_4)_2IrCl_6在碱式树脂上吸附与还原过程

超当量吸附是碱式笼形聚偕胺肟树脂（BCAO）吸附氯铱酸铵的特征之一．被吸附的氯铱酸铵与浴液中树脂的偕胺肟基的摩尔比为3．0，表明物理吸附在吸附过程中起主导作用．吸附结果是氯铱酸铵和偕胺肟基结合而成1：1络合物，并且发生了氧化还原反应，后者从扫描电镜观察得到证实。     

含西佛碱键的多羟基树脂的合成及对硼酸的吸附性能

分别用亲水性的聚乙烯胺和疏水性的聚苯乙烯为载体，合成了一系列含不同长度间隔臂的多羟基螯合树脂，并讨论了树脂对硼酸的吸附、洗脱性能，结果表明树脂在中性、弱酸性条件下可较好地吸附硼酸；吸附速率与载体的亲水性和间隔壁长度有关；测定了吸附反应表观活化能以及吸附硼酸后可用０．５Ｎ盐酸洗脱。     

锂在纤维素基磁性聚偕胺肟载锰树脂上的吸附

研究了Li+在纤维素基磁性聚偕胺肟载锰树脂（MMAO）上的吸附行为。实验结果表明，每一吸附中心与两个Li+离子结合．吸附容置随LiCl浓度和吸附中心密度的增大相应增大．在合适条件下，吸附容量达58gLi／kgMnO2。     

纤维素基磁性聚偕胺肟树脂的研究——溴在树脂上的氧化还原反应

用羟胺作模拟物与溴反应，测定了吸溴前后的酸式纤维素基磁性聚偕胺肟树脂的红外光谱，结合Ｆｒｅｕｎｄｌｉｃｈ及Ｌａｎｇｍｕｉｒ等温吸附方程的分析和吸溴前后树脂重量变化的测定，证明纤维素基磁性聚偕胺肟树脂吸溴后随即发生氧化还原反应，偕胺肟基被氧化为羧基，溴则被还原为溴离子，在溴浓度较高时，纤维素葡萄糖单元上的羟基被溴代或被氧化成羰酸，若葡萄糖苷键氧化断裂，将导致大分子降解。     

硅胶自环己烷溶液中吸附苯甲酸和苯的计量置换吸附模型

在293~313 K温度范围, 研究了硅胶在环己烷溶液中对苯甲酸和苯的吸附. 发现苯甲酸能非常好地服从计量置换吸附模型(SDM-A). 在用SDM-A处理苯的吸附时, 出现折线形的吸附等温线, 折线的转折点正好是单分子层吸附与多分子层吸附的分界点. 基于SDM-A, 研究了吸附热力学, 建立了吸附热力学的计算公式. 发现在环己烷溶液中苯甲酸被硅胶吸附是自发的、放热的熵增大过程, 而苯被吸附是自发的放热的熵减少过程, 苯甲酸的吸附自由能大于苯, 而吸附焓小于苯, 这是因为苯甲酸有更大的亲吸附剂作用和疏溶剂作用的结果.     

氨基修饰超高交联树脂对没食子酸的吸附性能

以亲水性小分子有机酸没食子酸作为研究对象,研究了氨基修饰超高交联树脂对没食子酸的吸附行为和机理.结果表明,氨基修饰超高交联树脂WJN-10对没食子酸有较高的吸附容量和吸附作用力;π-π共轭作用是树脂WJN-10吸附没食子酸主要作用力;WJN-10吸附没食子酸是物理吸附主导;吸附速率主要受控于颗粒内扩散过程;WJN-10对没食子酸有较好的吸附-脱附性能.     

硅胶自水溶液中吸附丙酸和丁酸的计量置换吸附模型

实验研究了硅胶在293、303和313 K下,从水溶液中对丙酸和丁酸的吸附.发现该吸附服从液 固吸附中的计量置换吸附模型（SDM A）.根据吸附模型的线性参数研究了吸附热力学和吸附机理.该吸附是一个自发的、放热的熵减少过程.丁酸的标准吸附自由能比丙酸大,而标准吸附焓比丙酸小.推导出了实验条件下吸附自由能变化的计算公式.     

应用理论计算研究MCM-22分子筛相邻酸性位上乙烯和苯的吸附

应用ONIOM计算方法研究了MCM-22分子筛超笼12元环上存在两个酸性位时的酸强度及其与骨架铝之间距离的关系,并研究了乙烯和苯分子吸附的规律.计算采用52T簇模型和B3LYP/6-31G**/MNDO方法.结果表明,存在两个酸性位且两个骨架铝之间间隔1个骨架硅时,酸强度比孤立的酸性位明显降低;当间隔的硅原子数增加时,酸强度呈上升趋势,间隔3个以上骨架硅时,其酸强度与孤立的酸性位几乎没有差别.对于乙烯的吸附,当两个骨架铝之间间隔1~4个骨架硅时,其吸附能几乎没有差别(31~35 kJ/mol);对于苯的吸附,当两个骨架铝之间间隔1个骨架硅时,其吸附能有所提高,因为两个桥羟基同时对苯分子产生氢键吸附作用.当两个骨架铝之间的距离增大时,苯的吸附能几乎相同(21~29 kJ/mol).若两个乙烯分子或苯分子同时吸附在双酸性位上,其吸附能与单个分子在孤立酸性位吸附时几乎没有差别.应用自然键轨道计算分析了吸附配合物的电子结构,进一步探明了乙烯和苯在分子筛酸性位上吸附的本质.     

腐植酸对砷的吸附作用研究

腐植酸中含有大量的极性基团,对金属离子有较强的吸附性能。运用氢化物-原子荧光光谱法,以泥炭腐植酸为原料,研究了腐植酸对砷(V)离子的吸附作用和腐植酸吸附剂中砷的回收,并得出了最佳的吸附和脱附条件。实验考察了酸度、时间分别对吸附和脱附的影响。结果表明,泥炭腐植酸对砷吸附的最佳模型为Freundlich吸附方程,当溶液成中性时腐植酸对砷的吸附量较大且趋于平稳。砷的浓度为1μg/mL,溶液的pH值为7,吸附时间控制在55min时,吸附效果最佳,最大吸附率为85.49%。脱附的最佳条件为:pH值14,脱附时间20min。     

Adsorption behavior of urokinase by polypropylene film modified with amino acids as affinity groups

In order to prepare a new-type adsorbent with an affinity ligand, polypropylene films modified with amino acid groups such as -phenylalanine (Phe), , -Phe, -cysteine (Cys), and , -tryptophane (Try), were prepared by radiation-induced grafting of glycidyl methacrylate (GMA) onto polypropylene (PP) films and subsequent amination of poly-GMA graft chains. The physical and chemical properties of the GMA-grafted PP film and the PP film modified with amino acid groups were investigated by IR and XPS. The adsorption of urokinase for the PP films modified with four kinds of amino acid groups were examined under various conditions, such as the contents of the amino acid group and pH value. The adsorption of urokinase increased with the increasing content of the amino acid group. The adsorption of the PP film modified with four kinds of amino acid groups was in the following order: -Phe> , -Phe> , -Try> -Cys. The adsorption amounts of urokinase by the PP film modified with four kinds of amino acid groups at pH 7.4 was higher than that at pH 9.0.     

Influence of some organic ligands on the adsorption of lead by agricultural soil

The adsorption of lead onto agricultural soil in the presence of organic compounds such as, humic acid, gallic acid or phenol was studied. The study included the factors affecting the adsorption process such as contact time, pH, adsorbent dose, metal concentration and organic ligands concentration. The experimental isotherm data were found to fit both Langmuir and Freundlich isotherms. The results show that the pseudo second-order equation provides the best correlation for the adsorption process. The results indicate that both humic acid and phenol increase the adsorption of lead while gallic acid slightly decreases the adsorption.     

Adsorption of Inorganic and Organic Arsenic Compounds by Aluminium-loaded Coral Limestone

Coral limestones were treated with an aqueous solution of aluminium sulfate and thereby aluminium-loaded coral limestones (Al-CL) were prepared. By use of Al-CL as an adsorbent, the adsorption of inorganic arsenic compounds (arsenate [As(V)] and arsenite [As(III)] and of organic arsenic compounds (methylarsonic acid, dimethylarsinic acid, and arsenobetaine) was examined. The adsorption ability of Al-CL is superior to that of iron(III)-loaded coral limestone (Fe-CL) for As(V), As(III), methylarsonic acid and dimethylarsinic acid. The adsorption of As(V) and As(III) is almost independent of the initial pH over a wide range (2 or 3 to 11). The addition of other anions, such as chloride, nitrate, sulfate and acetate, in the solution does not affect the adsorption of As(V) and As(III), whereas the addition of phosphate greatly interferes with the adsorption. Arsenic adsorption is effectively applied to a column-type operation and the adsorption capability for As(V) is 150 μg/g coral limestone.     

Cationic dye adsorption by poly(N-isopropylacrylamide/maleic acid) copolymeric hydrogels prepared by gamma rays

N-isopropylacrylamide/maleic acid hydrogels containing different quantities of maleic acid have been synthesized with γ-radiation. The hydrogels were used in experiments on swelling, diffusion and adsorption of a cationic dye methylene blue. The diffusion of MB into the hydrogels was found to be the non-Fickian type. The factors influencing adsorption capacity of the hydrogel such as gel composition, and irradiation dose were systematically investigated. The equilibrium data for dye adsorption was better described by the Freundlich isotherm than Langmuir isotherm model. The kinetic studies showed that the pseudo-second-order kinetic model fits better than the data obtained from pseudo-first-order model.     

Adsorption of benzoic acid from aqueous solution by three kinds of modified bentonites

Benzoic acid removal is important for the water treatment, and adsorption is an efficient treatment process. Three kinds of modified bentonites, hydroxy-aluminum pillared bentonite (Al(OH)-Bent), octadecyl trimethyl ammonium chloride modified bentonite (OTMAC-Bent), and both octadecyl trimethyl ammonium chloride and hydroxy-aluminum modified bentonite (Al(OH)-OTMAC-Bent) were prepared and characterized by XRD, FTIR, and BET analysis. Experiments were conducted on the adsorption of benzoic acid by the prepared modified bentonites at different temperatures in batch experiments. The results show benzoic acid adsorption capabilities of Na-Bent and Al(OH)-Bent are even low, but high for OTMAC-Bent and Al(OH)-OTMAC-Bent. Optimal conditions for the adsorption of benzoic acid on OTMAC-Bent and Al(OH)-OTMAC-Bent were as follows: pH of 3.5, 0.04 g/mL adsorbent, and contact time of 90 min. Increased adsorption with temperature indicates that the adsorptions of benzoic acid onto Al(OH)-OTMAC-Bent and OTMAC-Bent are spontaneous and endothermic. The adsorption data could be well interpreted by the Langmuir model and Temkin Equation. The adsorption efficiency was higher than 85%, suggesting that OTMAC-Bent and Al(OH)-OTMAC-Bent are excellent adsorbents for effective benzoic acid removal from water.