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  

“CAGE”POLYAMIDOXIME ADSORBENTS:EFFECT OF THE RESINS TREATED WITH PHENOLS ON THE ADSORPTIVITY FOR NOBLE METALS

作　　者：吴锦远[1] 扬超雄 

机构地区：[1]中国科学院广州化学研究所,广州510650

出　　处：《离子交换与吸附》1997年第3期252-260,共9页Ion Exchange and Adsorption

基　　金：广东省自然科学基金

摘　　要：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。The adsorption and occlusion of phenol, 4 - aminophenol, 4 - nitrophenol, 4 methylaminophenol sulfate and hydroquinone by cage polyamidoxime adsorbent (CAO) and the products obtained by nitric acid treatment(ACAO) and sodium hydroxide treatment(BCAO) were investigated. The neutralization equivalent of phenol -treated resins(ph/ACAO) were measured. It shows that the occlusion for foreign substances is a characteristics of the cage resins.Ag + .AuCl4- PtCl62-PdCl42- and IrCl62- ions are adsorbed effectively by ph/ACAO. The mode of absorption is dependent on the pH of the ionic solutions. From SEM observation, it is found that Ag+ .AuCl4 and IrCl62- ions are reduced to zero valent metals during the adsorption process so as to generate much crystals in various shapes which densely covered on the adsorbents.

关 键 词：笼形树脂 聚偕氨肟 酚处理 贵金属 吸附 吸留 

分 类 号：O647.33[理学—物理化学]