利用乳化液膜系統萃取鋅(II)離子並合成硫化鋅微粒之研究

A Study on the Extraction of Zinc(II) Ions and Synthesis of Zinc Sulfide Particle by Using Emulsion Liquid Membrane System

蘇煜昇(Yu-Sheng Su)

指導教授 ： 蔡德華

國立臺北科技大學/工程學院/化學工程所/碩士(2006年)

摘要

乳化液膜系統是一種具有分離、濃縮及固化等特性之特殊分離系統，在重金屬離子萃取回收技術上，具有相當價值性。但乳化液膜會因本身的膨潤現象產生破裂，降低了液膜穩定性及萃取效率。
本論文在探討如何增加乳化液膜的萃取效率，並應用乳化液膜合成硫化鋅奈米粒子。萃取實驗部分，主要改變界面活性劑種類與用量、載劑用量、油相用量與外相溶液pH值濃度等不同操作條件，探討乳化液膜萃取效率，並找出最佳操作條件組合。使用的界面活性劑為Span系列(山梨醣醇酯)的油溶性界面活性劑中的Span20、Span80，以酸性萃取劑二(2-乙基己基)磷酸(D2EHPA)為載劑，煤油為油相溶劑，氯化鋅為外相溶液。實驗結果顯示，在相同條件下，界面活性劑Span20比Span80萃取效率好，用量控制在2 wt%時最理想。在內相有機溶液中隨著載劑D2EHPA含量增加萃取量明顯增大，並亦隨外相水溶液鋅離子濃度及pH值增加鋅離子萃取量增加。
在應用乳化液膜系統合成硫化鋅實驗部分，主要探討用不同的合成法及乳液組成所合成的硫化鋅微粒的影響。利用XRD，TEM結構分析，UV/VIS，PL光學分析，動態光散射儀，分析其微粒。

關鍵字

乳化液膜 ； 萃取 ； 界面活性劑 ； 二(2-乙基己基)磷酸 ； 鋅離子 ； 硫化鋅

並列摘要

The emulsification liquid membrane system is a noble separation method it can be used for separation, concentration and solidification, etc.. It finds eotentiol application in recovery of heavy metal ion, extraction. But emulsion liquid membrane will break due to swelling, which in turn reduces liquid membrane stability and extract efficiency.
This study discussed how to increase the extraction efficiency, of emulsion liquid membrane system and the use of emulsion liquid membrane for synthesizing ZnS nanometer. Extract the experiment part, change the active pharmaceutical kind of interface and consumption, pharmaceutical consumption, oil looks consumption in year different from thickness of foreign minister solution pH value, etc. and operate the condition mainly, probe into the emulsification liquid membrane and extract efficiency, and find out and operate the condition association bestly. The active pharmaceutical of interface used, for Span 20, Span 80 in the dissolving surfactant concentration of interface of oil of Span series (mountain pear candy alcohol ester), phosphoric acid (D2EHPA) year pharmaceutical with acid extraction two pharmaceutical (2 - second base own base), the kerosene is the oil looks solvent, ZnCl2 is the foreign minister solution. The experimental result shows, under the same condition, surface-active agent Span 20 of interface is better than Span 80 extracts efficiency, it is the most ideal that consumption is controlled in 2wt%. Inclusive to increase the extracting amount to obviously increase with the pharmaceutical D2EHPA content of year in the organic solution, and also increase ZnCl2 extracting amount of Zn2+ ion to increase with the thickness pH value of foreign minister's aqueous solution.
In the section on the use of emulsification liquid membrane system to for synthesizing ZnS, we probed into the influence of synthetic method and solution conposition on the ZnS particles formed XRD and TEM were used to explone the structure. Optical analyses such as UV/VIS and PL and dynamic light scattering spectrometer, were also used to measure the size of the particles.

並列關鍵字

Emulsion Liquid Membrane ； Extraction ； D2EHPA ； Zinc Ion ； Zinc Sulfide ； Surfactant

參考文獻

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