- 作者： 劉春櫻; 方嘉德; 劉清標
- 作者服務機構： 國立臺灣大學化學系
- 中文摘要：
本研究以疊氮法由 Amberlite IRC-50樹脂母體製得硫代羥?酸鉗合離子交換樹脂。測定此種樹脂對鈷(Ⅱ)、銅(Ⅱ)、汞
(Ⅱ)、鎳(Ⅱ)、鉛(Ⅱ)、鋅(Ⅱ)、鐵(Ⅲ)、鉬(Ⅵ)和鈾(Ⅵ)等金屬離子在不同酸度下的吸收能力，發現此種樹脂對大部份上述離子的回
收率係隨pH值的增加而增加，約pH 4左右即可完全回收。而金屬離子於樹脂中的平衡速率甚快速，銅、鈷、鈾金屬離子
吸收量達百分之五十的飽和程度分別為1分鐘、0.5分鐘和3.5分鐘。在25°C，離子強度為0.2M條件下，樹脂之硫代經
?酸根酸解離常數為，其與鐵(Ⅲ)、鈾(Ⅵ)、銀(Ⅰ)、銅(Ⅱ)、汞(Ⅱ)、釩(Ⅴ)和鉬(Ⅵ)所形成錯化合物的形成常數分別為
，108.07' 107.39，107.63，及。此種樹脂管柱並配合流動系統用於ppb含量的鈾(Ⅵ)、鐵(Ⅲ)、銅(Ⅱ)和鉛
(Ⅱ)合成溶液的濃縮回收，並且應用於自來水中銅(Ⅱ)、鐵(Ⅲ)和鉛(Ⅱ)的含量分析。本研究並進一步探討外來鉗合試劑對利用
此種樹脂濃縮回收稀薄金屬離子溶液的影響。t - 英文摘要： A new chelating ion exchanger containing the thiohydroxamate groups was prepared from AmberliteIRC-50. The adsorption capacities of the proposed resin for Co(Ⅱ), Cu(Ⅱ), Hg(Ⅱ), Ni(Ⅱ), Pb(Ⅱ), Zn(Ⅱ),Fe(Ⅲ), Mo(Ⅵ) and U(Ⅵ) were measured at various pH values. The uptake of the metal ions increasedwith pH and was quantitative over pH 4 for most of the metal ions. The half saturation time of the resinfor Cu(Ⅱ), Co(Ⅱ) and U(Ⅵ) were 1 min, 0.5 min, and 3.5 min, respectively. The value of the dissociationconstant of the thiohydroxamlc acid group was and the conditional stability constants of resin forFe(Ⅲ), U(Ⅵ), Ag(Ⅰ), Cu(Ⅱ), Hg(Ⅱ), V(Ⅴ) ana Mo(Ⅵ) were andrespectively, at 25°C and μ= 0.2 M (KCl). An investigation also has been made of the uptake oftrace elements from both deionized water and tap water by a flow system of the short column of thethiohydroxamate resin. The effect of the determination of some metal ions in the presence of stronglycomplexed ligands is also discussed.
- 中文關鍵字： chelating resin; thiohydroxamic acid; flow system
- 英文關鍵字： --
