Interfacial Phenomena in the Extraction Kinetics of Nickel(II) with 2′-Hydroxy-5′-nonylacetophenone Oxime
Interfacial Phenomena in the Extraction Kinetics of Nickel(II) with 2′-Hydroxy-5′-nonylacetophenone Oxime
复制标题
2′-羟基-5′-壬基苯乙酮肟萃取镍(II)动力学中的界面现象
DOI：
--
复制
发表时间：
1986
期刊：
影响因子：
--
通讯作者：
K. Shibata
中科院分区：
文献类型：
--
作者：
H. Watarai;Manabu Takahashi;K. Shibata
用高速搅拌装置研究了正庚烷/水体系中（E）-2′-羟基-5 ′-壬基苯乙酮肟的界面吸附及其对镍（II）离子萃取动力学的影响.界面肟浓度与有机相浓度相关，服从Langmuir等温线。肟的界面活性也通过界面张力测量来测量。镍（II）离子的初始提取率与肟的界面浓度（而不是体相浓度）、镍离子浓度成线性比例，与氢离子浓度成反比。这些结果支持了萃取速率控制步骤是在界面处形成1：1络合物的机理。
The interfacial adsorption of (E)-2′-hydroxy-5′-nonylacetophenone oxime and its role in the extraction kinetics of the nickel(II) ion with the oxime were investigated in heptane/aqueous phase systems by means of a high-speed stirring apparatus. The interfacial oxime concentration was correlated to the organic phase concentration, obeying the Langmuir isotherm. The interfacial activity of the oxime was also measured by means of interfacial tension measurements. The initial extraction rate of nickel(II) ion was linearly proportional to the interfacial concentration of the oxime (rather than to the bulk-phase concentration), to the nickel-ion concentration, and inversely to the hydrogen-ion concentration. These results supported the mechanism that the rate-determining step in the extraction is the 1:1 complex formation at the interface.