共查询到20条相似文献,搜索用时 78 毫秒
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三唑螯合树脂AMTR的合成及对Au(Ⅲ)吸附性能研究 总被引:4,自引:0,他引:4
合成以氯甲基化聚苯乙烯为骨架,以4-氨基-3,5-二甲基-1,2,4-三唑为功能基(AMT)的新型三唑螯合树脂AMTR,讨论了酸度、时间、浓度等因素对树脂吸附Au(Ⅲ)的影响,另对树脂的吸附选择性及洗脱性能加以说明。 相似文献
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以胺树脂为载体含羟基(巯基)的螯合树脂的合成及吸附性能 总被引:1,自引:0,他引:1
以胺树脂为载体含羟基(巯基)的螯合树脂的合成及吸附性能倪才华,徐羽梧(荆州师专化学系,江陵,434100)(武汉大学化学系)关键词螯合树脂,吸附性能,巯基,羟基,贵金属螯合树脂用于贵金属的浓缩与回收工作一直引人注目.不少含硫氮的螯合树脂对于某些贵金属... 相似文献
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通过NP树脂在不同pH时对La~(3+)、Y~(3+)、UO_2~(2+)、Zr~(4+)和Fe~(3+)等离子的吸附试验,表明NP树脂在较宽的pH范围内对La~(3+)和Y~(3+)离子有良好的吸附性,如选择适当pH,可达到与其它伴生元素分离的目的。NP树脂在pH=4时,对La~(3+)的交换容量为1mmol La~(3+)/g干树脂。然而吸附速度较慢为该树脂不足之处。 相似文献
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水杨酸型螯合树脂对Fe(Ⅲ)离子的螯合吸附行为 总被引:2,自引:0,他引:2
以5-氨基水杨酸(ASA)为胺化试剂,使氯甲基化的交联聚苯乙烯(CMCPS)微球表面的苄氯基团发生亲核取代反应,制得了水杨酸型螯合树脂ASA-CPS.研究了该螯合树脂对金属离子的螯合吸附行为,探讨了其吸附热力学与吸附机理,考察了介质pH值对树脂螯合吸附性能的影响以及树脂对不同金属离子的螯合吸附能力.实验结果表明,水杨酸型螯合树脂ASA-CPS对重金属离子具有强螫合吸附性能,尤其对Fe3+子表现出很强的螯合吸附能力,常温下吸附容量可达21 g/100 g.吸附过程属熵驱动的化学吸附过程,升高温度,吸附容量增高;在可抑制金属离子水解的pH范围内,介质的pH值越高,螯合吸附能力越强;对于性质不同的金属离子,ASA-CPS的吸附性能是有差别的,吸附容量的顺序为Fe3+>Ni2+>Cu2+>Zn>3+ 相似文献
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新型SGN螯合树脂吸附贵金属性能和机理的研究 总被引:14,自引:2,他引:14
本文首次研究自制的氨基胍基螫合树脂吸附贵金属的行为。测定了树脂在HCl及H_2SO_4介质吸附贵金属的分配系数和吸附百分率,并研究了各种贵金属的吸附速率、以及酸度和温度等对吸附过程的影响。并提出树脂对贵金属配阴离子的配位和交换共存的吸附历程。 相似文献
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含羟基(巯基)的叔胺型螯合树脂的合成及吸附性能倪才华(湖北荆州师范专科学校化学系荆沙434100)徐羽梧(武汉大学化学系武汉430072)关键词螯合树脂,巯基,吸附性能,贵金属已有研究表明:含硫氮的资合树脂对于贵金属离子有优良的吸附性能l’一又N,N... 相似文献
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聚苯乙烯负载2-氨基-5-乙基-1,3,4-噻二唑螯合树脂的合成及其吸附性能 总被引:2,自引:0,他引:2
以氯甲基化聚苯乙烯 (PS)、一缩二乙二醇 (DEG)、二缩三乙二醇 (TEG)为原料,通过亲水性悬臂将杂环功能基2-氨基5-乙基-1,3,4-噻二唑 (AETZ) 引入到聚苯乙烯-二乙烯苯母体中,合成了两种新型螯合树脂 (PS-DEG-AETZ,PS-TEG-AETZ),并对两种树脂进行了红外光谱和元素分析表征.测定了该树脂对Cu2 、Pb2 、Zn2 、Ag 、Hg2 等金属离子的吸附性能.结果表明,PS-DEG-AETZ,PS-TEG-AETZ对Hg2 、Ag 的静态吸附量分别为0.41mmol/g和0.30mmol/g,对Cu2 、Pb2 、Zn2 的吸附量为零,表现出很好的吸附选择性,亲水性悬臂长度的增加有利于树脂吸附量的增加. 相似文献
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大孔聚丙烯醛-呋喃-2-硫代酰腙螯合树脂的合成及其性能的初步研究 总被引:1,自引:0,他引:1
合成了一新型高分子骨架,大孔内烯醛-苯乙烯-二乙烯苯三元共聚物树脂骨架,通过其含有的活泼醛基与呋喃-2-硫代酰肼螯合剂进行高分子反应,制备了一种含氮、硫配位原子的螯合树脂,聚丙烯醛-呋喃-2-硫代酰腙。对其与贵金属离子的吸附性能进行了初步研究,结果表明,该树脂对金、钯及铂具有选择性吸附作用,吸附容量分别为1.20mmol/g干树脂,0.37mmol/g干树脂及0.28mmol/g干树脂。 相似文献
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三价金配合物抗肿瘤活性研究* 总被引:1,自引:0,他引:1
三价金配合物具有潜在的抗肿瘤活性,是目前金属药物领域的研究热点。本文按配位原子的不同总结了稳定三价金配合物的结构特征,按其生物活性的构效关系、生物靶点和作用机制综述了三价金配合物抗肿瘤活性研究的最新成果:配体的结构特点以及离去基团对三价金配合物的体外细胞毒性影响较大;介绍了用于检测三价金配合物与可能的生物靶分子之间的相互作用的多种物理和生物学方法,重点关注了相互作用的模式,如嵌入/静电吸引/共价结合等,并解释了三价金配合物抗肿瘤活性的原因。最后提出了一些研究新思路,以期有助于设计得到靶标明确的具有良好药理活性的抗肿瘤药物。 相似文献
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铜印迹螯合树脂对金属离子的吸附特性 总被引:2,自引:0,他引:2
研究了铜印迹螯合树脂与非印迹螯合树脂对金属离子的吸附性能,结果表明:铜印迹树脂对Cu^2 、Ni^2 、Zn^2 的吸附量比非印迹树脂有显著增大,两者对Cu^2 的吸附速率均较快,其表观吸附速率分别为0.044s^-1和0.040s^-1;印迹树脂对Cu^2 的吸附可用Langmuir或Freundlish等温式来描述;其动态吸附曲线与离子的起始浓度相关;用0.5mol/L HCl即可快速洗脱吸附的Cu^2 ,树脂具有较强的再生能力,可以重复使用。 相似文献
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Iogann Tolbatov Alessandro Marrone Cecilia Coletti Nazzareno Re 《Molecules (Basel, Switzerland)》2021,26(24)
Owing to the growing hardware capabilities and the enhancing efficacy of computational methodologies, computational chemistry approaches have constantly become more important in the development of novel anticancer metallodrugs. Besides traditional Pt-based drugs, inorganic and organometallic complexes of other transition metals are showing increasing potential in the treatment of cancer. Among them, Au(I)- and Au(III)-based compounds are promising candidates due to the strong affinity of Au(I) cations to cysteine and selenocysteine side chains of the protein residues and to Au(III) complexes being more labile and prone to the reduction to either Au(I) or Au(0) in the physiological milieu. A correct prediction of metal complexes’ properties and of their bonding interactions with potential ligands requires QM computations, usually at the ab initio or DFT level. However, MM, MD, and docking approaches can also give useful information on their binding site on large biomolecular targets, such as proteins or DNA, provided a careful parametrization of the metal force field is employed. In this review, we provide an overview of the recent computational studies of Au(I) and Au(III) antitumor compounds and of their interactions with biomolecular targets, such as sulfur- and selenium-containing enzymes, like glutathione reductases, glutathione peroxidase, glutathione-S-transferase, cysteine protease, thioredoxin reductase and poly (ADP-ribose) polymerase 1. 相似文献
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《Journal of Saudi Chemical Society》2022,26(6):101564
A new aminophosphonic acid chelating resin was successfully prepared via electron beam irradiation grafting combined with chemical modification and used for the efficient removal of La(III). Firstly, glycidyl methacrylate (GMA) was grafted to polystyrene microspheres (PS) via electron beam co-radiation to obtain PS-PGMA microspheres, then followed by the amination with diethylenetriamine (DETA) to formed PS-PGMA-DETA (PGD) microspheres through nucleophilic substitution between amino and epoxy group, and finally PS-PGMA-DETA-PA (PGDP) microspheres was obtained by phosphorylation with phosphorous acid (PA). The obtained chelating resin absorbent was characterized by Fourier-transform infrared (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), which demonstrated that the millimetric aminophosphonic acid chelating resin were successfully prepared with well-defined morphology and enhanced thermal stability. The X-ray photoelectron spectroscopy (XPS) characterization results confirmed a possible adsorption mechanism, which is mainly based on the chelation and coordination of N and O in PDGP with La(III) in the solution. A series of parameters were taken into account in the adsorption experiment, such as absorbed dose, GMA concentration, dosage of PGDP, pH, contact time, temperature, and the initial concentrations of La(III). The maximum adsorption capacity obtained from the research can be achieved 288.69 mg/g at 298.15 K, pH = 6. The kinetic sorption for for La(III) fitted the type 1 pseudo-second-order (R2 = 0.9981), which revealed that the La(III) are chemisorbed on the surface of the PGDP. It was concluded that the La(III) adsorption conformed to the Freundlich equation, indicating a multilayer adsorption process. Thermodynamic data indicated that the La(III) uptake process was a spontaneous and endothermic. In addition, this research provided a new irradiation grafting method for rare earth ions removal. 相似文献