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標題: 固定化零價鐵與銅薄膜之製備及應用
Preparation and Application of Immobilized Zero-Valent Iron and Copper Membranes
作者: 孫幸宜
關鍵字: 化學工程類
Nanoscale zero-valent iron membrane
Immobilized copper ion membrane
Zero-valent copper membrane
摘要: There are various methods for immobilizing inorganic nanoparticles or metal ions onto thepolymeric membranes, such as coating, deposition, entrapment, chemical coupling, etc., to form thecomposite membranes. In this project, chemical coupling method is suggested for preparing theimmobilized zero-valent iron or copper membranes to apply in pollutant adsorption or degradation,regarding the fact that the inorganic nanoparticles or metal ions will be immobilized on the surfaceand accessible for the solutes in liquid to touch, thus reducing the mass-transfer limitation. In thefirst year, this project aims to prepare the immobilized nanoscale zero-valent iron (NZVI)membranes for the degradation of azo dyes or phenolic compounds. Ferric ions will be introducedand adsorbed onto the cation-exchange membrane and then reduced to zero-valent ironnanoparticles by adding the reducing agent in an anaerobic environment. The NZVI membraneproperties and pollutant degradation performance for three kinds of cation-exchange membranes(with phosphate, sulfonic acid, and carboxyl groups, respectively) will be investigated. The NZVImembrane design can offer multiple functions in parallel: microfiltration, water softening (byadsorbing metal ions via cation-exchange), and pollutant degradation. It is hoped to become apromising water treatment technique.In the second year, this project will focus on the preparation of immobilized copperion/zero-valent copper membrane for analyte enrichment. Two types of membranes are proposed forthis study. One is the acid-pretreated glass fiber membrane, whose OH groups will be coupled withAPTES (3-aminopropyl triethoxysilane) to form the amine-terminated membrane. The other is theconductive polymer membrane with amine groups. Cu2+ ions will be introduced to the abovemembranes and initiate the strong Lewis acid-base interaction with the amine groups to form theimmobilized copper ion membranes. Alkylamine molecules will be next added and interacted withthe immobilized copper ion membranes through the Lewis acid-base interaction. Then, the alkylgroups will be exposed and the membranes will become hydrophobic. The hydrophobic membranescan be applied to the adsorption of polychlorinated biphenyl or phenolic compounds. The desorptionstep will be carried out by either using the reducing agent for the glass fiber membrane or applyinga potential to the conductive polymer membrane to reduce Cu2+ ions to Cu, thus significantlyweakening the Lewis acid-base interaction. The adsorbed analytes should then elute together withthe alkylamine. Since the copper ion reduction step is very fast and no organic solvents are requiredfor desorption, the immobilized copper ion/zero-valent copper membrane proposed in this project isa time-efficient and environmentally friendly technique for water quality analysis.
其他識別: NSC100-2221-E005-060
Appears in Collections:化學工程學系所



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