聚乙烯亞胺的合成及廢水中微量重金屬吸附之研究

Preparations of Polyethyleneimines for Trace Heavy Metallic Ions Enrichment

梁智瑋(Chih-wei Liang)

指導教授 ： 陳幹男

淡江大學/理學院/化學學系碩士班/碩士(2010年)

https://doi.org/10.6846/TKU.2010.00550

摘要

本論文是以聚乙烯亞胺的合成和微量重金屬之吸附為主要目的。因為含有微量重金屬的水溶液仍會為害人體，所以在水處理上，要如何將水中重金屬離子的含量降至最低成為本研究主要目標所在。
本研究使用含有胺基的TMPTA-Az為螯合金屬離子之主體，加入最佳化比例Acrylic acid使之形成網狀聚合物N-PEI(Networked Polyethyleneimine)；藉由此種交聯特性，本研究順利製作出將TMPTA-Az附著於二氧化矽上可以達到增加螯合表面積進而增加螯合效率的方法。另外利用交聯聚合物本身並不溶於水之特性，我們可以放心將此種螯合劑與水相溶液接觸，且不會帶走螯合劑，確保重複利用可行性Cu2+10次循環仍有70%的再螯合率(20分鐘酸洗條件)，再螯合率87%(1天酸洗條件)；Pb2+10次循環仍有60%的再螯合率(20分鐘酸洗條件)，(1天酸洗條件)。
本研究針對材料特性分析Cu2+、Pb2+金屬離子濃度變化探討、最佳螯合時間探討(40分鐘，Cu2+ 與 Pb2+)、溫度變化探討(83℃，Cu2+ 與 Pb2+)、pH值變化探討(pH5.3，Cu2+ 與 Pb2+)，最後討論PEI等溫吸附模式。

關鍵字

聚乙烯亞胺 ； 螯合 ； 重金屬

並列摘要

In this research, it well-known that human were hurt by trace heavy metal. So we utilized the subject of TMPTA-AZ and suitable ratio of Acrylic acid that synthesized crosslinking polymer. It called “polyethyleneimine” that can chelated metal ion forming complex . Crosslinking polymer can insoluble in water base solution. The feature is good, because we need a base to concentrated trace heavy metal. The metal ion usually appears in water solution.
We successfully created the TMPTA-Az that can be attached to the silica surface area to increase the chelating efficiency.
N-PEI/SiO2 recycles and reuse had a good result for cupric ion (10cycles, 70% chelating efficiency in 20min acid wash; 87% chelating efficiency in 1 day acid wash) and lead ion(10cycles, 60% chelating efficiency in 20min acid wash; 76% chelating efficiency in 1 day acid wash)
N-PEI/SiO2 Material properties of cupric ion(maximum chelating efficiency, 0.141Cu2+/N), lead ion(maximum chelating efficiency, 0.135Pb2+/N) concentrations of metal ions, the best time of adsorption(40 min for Cu2+ and Pb2+ ), changes of temperature(83℃ for Cu2+ and Pb2+), value changes of pH(pH5.3 for Cu2+ and Pb2+), and finally discuss the PEI adsorption isotherm.

並列關鍵字

Polyethyleneimine ； Chelating ； Enrichment

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