摘要
本文研究了Ｃｄ（Ⅱ）在三正辛胺－ 煤油支撑液膜体系中影响Ｃｄ（Ⅱ）迁移的各种因素，并测定了有关条件下Ｃｄ（Ⅱ）跨越膜的渗透系数Ｐ。结果表明，膜相载体三正辛胺浓度适度增加，Ｃｄ（Ⅱ）迁移的渗透系数Ｐ增加。三正辛胺浓度增至０．８ｍ ｏｌ／Ｌ时，Ｐ值下降。搅拌转速、料液中Ｈ＋ 浓度和Ｃｄ（Ⅱ）浓度、温度均影响Ｃｄ（Ⅱ）的迁移。反萃剂醋酸铵比氢氧化钠好，煤油比四氧化碳更适宜作膜溶剂。三正辛胺－ 煤油支撑液膜体系能快速地迁移Ｃｄ（Ⅱ）。
The effects of carrier concentration, H + concentration and Cd(Ⅱ) concentration in feed solution, stirring rate, membrane solvent, stripping agent and temperature on the transport of Cd(Ⅱ) ions through a TNOA-kerosene supported liquid membrane were studied in this work. The permeability coefficient, P(cm/s) of Cd(Ⅱ) ions through the supported liquid membrane has been measured. The experimental results showed that the Cd(Ⅱ) ions in feed solution was efficiently transported into the strip solution by the tri-n-octyl amine-kerosene supported liquid membranes.
出处
《水处理技术》
CAS
CSCD
1999年第6期330-334,共5页
Technology of Water Treatment
基金
湖南省科委应用课题基金
关键词
镉离子
支撑液膜
萃取
膜分离
cadmium ions
tri-n-octyl amine
supported liquid membrane
kerosene
