几种吸附树脂对硝基化合物吸附性能的研究

研究NJ－8、AM－1、Amberlite XAD-4、JX－101 4种吸附树脂对对硝基苯乙酮和对硝基苯甲酸的静态吸附行为。结果表明：江苏南大戈德环保科技有限公司研制的NJ－8和AM－1两种吸附树脂对硝基化合物的吸附效果较好。并研究NJ－8型吸附树脂的动态吸附和脱附行为，结果显示：NJ－8型吸附树脂对对硝基苯甲酸的吸附容量为128mg/g干树脂，对对硝基苯乙酮的吸附容量为383mg/g干树脂。用8%NaOH:乙醇（体积比1：1）洗脱吸附酸的树脂，用甲醇或乙醇洗脱吸附酮的树脂，体积为5BV时，温度分别为333K和313K，脱附率均接近100％。     

超高交联吸附树脂对苯甲酸的吸附研究

用新合成的NJ－8超高交联吸附树脂吸附苯甲酸，并与Amberlite XAD-4进行比较。从静态平衡吸附行为及其热力学性质讨论吸附机理。动态穿透吸附实验进一步验证了NJ－8提高交联吸附树脂对苯甲酸的吸附能力约为Amberlite XAD-4的1.6倍。     

吸附树脂和络合树脂联合处理对硝基苯乙酮生产废水的研究

本文采用南京大学研制的AM－1型吸附树脂和ND－900型络合树脂联合处理对硝基苯乙酮生产废水，系统地研究了流速、温度、废水的pH值等因素对树脂吸附性能的影响，以及以NaOH为脱附剂，其流速、浓度、温度等对树脂脱附性能的影响。当废水的处理量为30BV时，其CODCr总去队达93％，表明树脂吸附性能良好。     

非水体系中磺酸铜型树脂对苯胺衍生物的配位吸附

研究了磺酸铜型树脂在乙醇和正己烷中对3种芳胺的吸附行为，结果表明：磺酸铜型树脂在乙醇和正己烷中对苯胺，N－甲基苯胺和N，N－二甲基苯胺具有较好的吸附性能，且随着吸附质N原子上取代基的增加，吸附的亲和性逐渐减小，表现出明显的吸附选择性，因此，磺酸铜型树脂有望应用于在非小体系中吸附分离或去除某些难溶于水的天然产物如生物碱等物质。     

几种树脂对西红花糖苷的吸附性能的研究

本文系统研究了硅胶和几种国产吸附树脂对西红花提取物溶液的吸附与洗脱性能，包括树脂的筛选，洗脱剂的选择，并研究了pH，温度和西红花提取物的浓度对西红花提取在SZ－1吸附树脂上的吸附影响，结果表明，SZ－1吸附树脂对西红花提取物的吸附能力较强，洗脱能力为最好，其吸附性能和洗脱性能均优于常用色谱固定相硅胶，SZ－1吸附树脂的静态吸附容量为1．04g/g，动态吸附容量为0．5－0．6g/g，洗脱率可达98％以上，且吸附速度快，易于洗脱和再生。     

缩聚型邻苯二酚树脂的合成及对硼酸的吸附性能

合成了球状邻苯二酚－－甲醛树脂，并讨论了它对硼酸的吸附性能。结果表明，树脂可在中性和弱碱性条件下较好地吸附硼酸；测定了树脂蝗吸附等温曲线，树脂对硼酸的理论吸附量可达６．１４ｍｇ．Ｂ／ｇ干树脂，并且具有良好的动态吸附及洗脱性能。     

苯酚和苯胺在超高交联吸附树脂上的共吸附行为

研究了水溶液中苯酚和苯胺在超高交联吸附树脂NDA103、NDA101、NDA100上的竞争吸附和协同吸附行为.实验结果表明,单组分苯酚或苯胺水溶液和双组分共存水溶液中吸附质分子在超高交联吸附树脂上的吸附等温线均符合Langmuir模型.当双组分摩尔比为1∶1时,在较低平衡浓度范围内苯酚和苯胺在树脂上呈现竞争吸附行为,其主导机制是两种吸附质分子对树脂内外表面上π-π作用吸附位点的直接竞争;而在较高平衡浓度范围内呈现协同吸附行为,其主导机制是两种吸附质分子之间的氢键作用.吸附温度由293K升至313K时,苯酚和苯胺在NDA103上的协同吸附作用加强,而在NDA101和NDA100上的协同吸附作用变化不明显.     

酚醛型吸附树脂对茶碱的吸附性能研究

研究了酚醛型吸附树脂对茶碱的静态和动态吸附。结果表明3种树脂对茶碱的吸附量均达117－204mg/g，明显优于DuoliteS-761;酚醛型吸附树脂等温吸附茶碱的平衡吸附数据符合Langmuir方程，相关系数在0．99以上，因此，酚醛型吸附树脂吸附茶碱属单分子层吸附；用1mol/LHCl和W甲醇为80％复合溶液作为吸附树脂的洗脱剂，效果很好。     

ZK-1树脂对对甲基苯胺工业废水的柱吸附研究

选择NDA-150与ZK-01树脂作为吸附剂,以工业对甲基苯胺废水为研究对象,进行了树脂柱吸附废水的研究.工业对甲基苯胺废水中,对甲基苯胺含量为5300mg/L,吸附过程中,流量为1BV/h,温度为303K,NDA-150与ZK-01树脂分别吸附处理废水12BV、19BV时,废水中对甲基苯胺去除率为约98%.实验结果表明,ZK-01树脂吸附处理对甲基苯胺废水能力强于NDA-150,这是由于ZK-01树脂骨架上键联的弱酸基团与氨基生成酸碱络合物的结果.通过分析ZK-1树脂吸附-脱附处理对甲基苯胺废水的稳定性试验与脱附所得回收物质鉴定,ZK-1树脂具有运行稳定与回收物质可利用的特点.     

牛磺酸在大孔吸附树脂上的吸附-解吸行为研究

本文研究了S－8、D4020、NKA2、AB-8、D4006、NKA9、D3520、X－5等国产树脂对牛磺酸的吸附行为．S－8和D4020对牛磺酸的吸附能力较强,静态吸附容量在12mg／g以上．实验测定了28℃时牛磺酸在S－8和D4020上的吸附等温线,并研究了pH、盐析效应和温度对牛磺酸在S－8和D4020上吸附的影响,结果表明,温度对吸附影响很大．用80℃去离子水对吸附在树脂上的牛磺酸进行解吸,解吸率可达90％以上．     

超高交联吸附树脂吸附对硝基苯乙酮的热力学研究

比较两种超高交联聚苯乙烯吸附树脂NJ-8、AM-1与Amberlite XAD-4(以下简称XAD-4)对对硝基苯乙酮的静态吸附行为，根据吸附等温线研究了吸附热力学性质．在298～318K和研究的浓度范围内，NJ-8，AM-1、XAD-4对对硝基苯乙酮的吸附平衡数据符合Freundlich吸附等温方程．结果表明：吸附为放热过程，适当降低温度有利于吸附．计算了对硝基苯乙酮在NJ-8，AM-1、XAD-4树脂上的吸附焓变、自由能变，吸附熵变．对吸附行为作了合理的解释。     

超高交联树脂对苯胺和对硝基苯胺的吸附行为

吸附热力学;化学吸附;超高交联树脂对苯胺和对硝基苯胺的吸附行为     

A WATER-COMPATIBLE PHENOLIC HYDROXYL MODIFIED POLYSTYRENE AS AN ADSORBENT FOR ADSORBING PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS

1. INTRUDUCTION As most phenolic compounds are extremely toxic at the concentrations discharged into accepting effluents, the removal or destruction of phenolic compounds from such streams has become a significant environmental task [1]. Increasing concern for public health and environmental quality has led to the establishment of limits on the acceptable environmental levels of specific pollutants [2]. Consequently there has been a growing interest in developing and implementing various …     

A WATER-COMPATIBLE PHENOLIC HYDROXYL MODIFIED POLYSTYRENE AS AN ADSORBENT FOR ADSORBING PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS

A water-compatible phenolic hydroxyl modified polystyrene adsorbent (AM-1) foradsorbing and removing phenolic compounds from aqueous solutions was prepared by covalent bonding of phenolic hydroxyl groups to the surface of porous polystyrene-divinylbenzene beads, this resin can be used directly without wetting process. A comparison of the sorption properties of the new resin and Amberlite XAD-4 toward four phenolic compounds, phenol, p-cresol, p-chlorophenol,and p-nitrophenol was made. The capacities of equilibrium adsorption of AM-l for all four phenolic compounds increased around 20% over that of Amberlite XAD-4, which may be contributed to phenol hydroxyl group on the surface and the unusual pore distributior. At their dilute solution, the equilibrium adsorption capacities of AM-1 for phenol increased about 62% over that of Amberlite X4D-4, while equilibrium adsorption capacities of the other three phenolic compounds increased 4-35%, suggesting an advantage of AM-I over Amberlite XAD-4 in the collection of phenol.Freundlich isotherm equations and isosteric adsorption enthalpies for the four phenolic compounds indicate a physical adsorption process on the Amberlite XAD-4 and AM-I resins. Column studies for phenol show that AM-1 resin has excellent adsorption and desorption performance.     

超高交联吸附树脂对芳香有机物的吸附机理

通过3种吸附树脂AmberliteXAD-4、AM-1和JX101对芳香化合物苯胺、苯酚和苯甲酸在不同温度下的吸附特征,利用前线轨道理论进行了合理解释。结果表明,吸附剂表面进行适当的修饰,可以改变吸附剂的LUMO或HOMO,使吸附质分子与吸附剂表面的功能基产生化学作用,从而产生额外的化学吸附量,为优化设计吸附剂提供了理论指导。     

THERMODYNAMIC STUDY OF ADSORPTION OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTION BY A WATER-COMPATIBLE HYPERCROSSLINKED POLYMERIC ADSORBENT

Equilibrium data for the adsorption of phenolic compounds, i.e., phenol, p-cresol, p-chlorophenol and p-nitrophenol from aqueous solutions by a water-compatible hypercrosslinked polymeric adsorbent (NJ-8) within temperature range of 283-323 K were obtained and correlated with a Freundlich-type of isotherm equation, so that equilibrium constants KF and n were obtained. The capacities of equilibrium adsorption for all the four phenolic compounds on the NJ-8 from aqueous solutions are around 2 times as high as those of Amberlite XAD-4, which may be attributed to the unusual micropore structure and the partial polarity on the network. The values of the enthalpy (always negative) are indicative of an exothermic process, which manifests the adsorption of all the four phenolic compounds on the two polymeric adsorbents to be a process of physical adsorption. The negative values of free energy change show that the solute is more concentrated on the adsorbent than in the bulk solution. The absolute free energy values of adsorption for NJ-8 are always higher than those for Amberlite XAD-4, which indicates that phenolic compounds are preferentially adsorbed on NJ-8. The negative values of the adsorption entropy are consistent with the restricted mobilities of adsorbed molecules of phenolic compounds as compared with the molecules in solution. The adsorption entropy values of phenolic compounds for NJ-8 are lower than those for Amberlite XAD-4, which means the micropores of NJ-8 require more orderly arranged adsorbate.     

Schiff碱螯合树脂的合成及其对金属离子的吸附规律

以交联聚苯乙烯为母体的大孔螯合树脂的合成及其应用已有文献报道,我们根据光亮镀镍工艺的特定要求,合成了4种对Cu²⁺具有良好吸附性能的Schiff碱大孔新型螯合树脂。     

A WATER—COMPATIBLE PHENOLIC HYDROXYL ODIFIED POLYSTYRENE AS AN ADSORBENT FOR ADSORBING PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS

A water-compatible phenolic hydroxyl modified polystyrene adsorbent (AM-1) for adsorbing and removing phenolic compounds from aqueous solutions was prepared by covalent bonding of phenolic hydroxyl groups to the surface of porous polystyrene-divinylbenzene beads,this resin can be used directly without wetting process.A comparison of the sorption properites of the new resin and Amberlite XAD-4 toward four phenolic compounds,phenol,p-cresol,p-chlorophenol,and p-nitrophenol was made.The capacities of equilibrium adsorption of AM-1 for all four phenolic compounds increased around 20% over that of Amberlite XAD-4,which may be contributed to pheonl hydroxyl group on the surface and the unusual poe distribution.At their dilute solution,the equilibrium adsorption capacities of AM-1 for phenol increased aout 62% over that of Amberlite XAD-4,while equilibrium adsorption capacities of the other three phenolic compounds increased 4-35%,suggesting an advantage of AM-1 over Amberlite XAD-4 in the collection of phenol.Freundlich isotherm equations and isosteric adsorption enthalpies for the four phenolic compunds indicate a physical adsorption process on the Amberlite XAD-4 and AM-1 resins,Column studies for phenol show that AM-1 resin has excellent adsorption and desorption performance.     

一种亲水的酚羟基修饰聚苯乙烯树脂对酚类化合物的吸附热力学

在283-323K和研究的浓度范围内,苯酚、对甲苯酚、对氯苯酚和对硝基苯酚在亲水性的酚羟基修饰聚苯乙烯树脂（AM-1）与大孔吸附树脂（Amberlite XAD-4)上平衡吸附数据符合Freundlich吸附等温方程。酚类化合物在AM-1上的吸附容量比在Amberlite XAD-4上的吸附容量增加20%以上,这主要得益于AM-1表面的酚羟基入树脂的微孔结构。在较稀的溶液中AM-1对苯酚的吸附量比AmberliteXAD-4对苯酚的吸附量增加60%,表明AM-1对苯酚有特殊的选择性。Freundlich吸附等温线、相对吸附容量以及等量吸附焓表明,四种酚在两种树脂上的吸附是物理吸附过程。对酚类化合物被两种树脂吸附的吸附焓、自由能、吸附熵也作了测试,并对吸附行为作了合理的解释。