초록 ▼

산업계에서 폐수로 많이 배출되는 클로로 페놀류 및 니트로 페놀류의 분석을 위하여 페놀류의 추출방법 및 검출방법을 연구하였다. 특히 극미량의 성분을 검출하기 위하여 유도체와 반응을 통하여 검출한계를 낮추며 이들의 크로마토그래피에서 용리 거동 현상을 연구하였다.일반적으로 다이옥신은 클로로 화합물들을 연소 시킬때 많이 생성되고 있으며 본 연구에서도 클로로 화합물의 소각시 형성되는 다이옥신류를 조사하고, 또한 열에 의해서 분해되는 분해산물들을 조사한다. 또한 다이옥신류의 분해에 의해서 독성 화합물이 생성되는지 여부가 발생되는지 연구하여,

산업계에서 폐수로 많이 배출되는 클로로 페놀류 및 니트로 페놀류의 분석을 위하여 페놀류의 추출방법 및 검출방법을 연구하였다. 특히 극미량의 성분을 검출하기 위하여 유도체와 반응을 통하여 검출한계를 낮추며 이들의 크로마토그래피에서 용리 거동 현상을 연구하였다.일반적으로 다이옥신은 클로로 화합물들을 연소 시킬때 많이 생성되고 있으며 본 연구에서도 클로로 화합물의 소각시 형성되는 다이옥신류를 조사하고, 또한 열에 의해서 분해되는 분해산물들을 조사한다. 또한 다이옥신류의 분해에 의해서 독성 화합물이 생성되는지 여부가 발생되는지 연구하여, 고온에서 그들의 분해 메카니즘에 대하여 연구하였다.

Abstract ▼

As the production of synthetic organic chemicals has been increased exponentially over the past several decades, it is obvious that the contamination of water, soil and air with such compounds is and will continue to be a major issue in environmental protection. Environmental samples are usually com

As the production of synthetic organic chemicals has been increased exponentially over the past several decades, it is obvious that the contamination of water, soil and air with such compounds is and will continue to be a major issue in environmental protection. Environmental samples are usually complex mixture of organic chemicals which cover an extremely diverse range of chemical types. These organic compounds are introduced into the environmental media by emission into the air, by industrial and domestic effluents, by waste production and generally incorrect final disposal, by using fertilizers and pesticides in agriculture, and by pollution accidents or by other human activities.The appearance of organic pollutants in environment and their identity can be analyzed based on the information obtained by gas and liquid chromatography in conjunction with mass spectrometry system. The reasons for its predominate use in the environmental analysis are excellent separartion efficiency, simultaneous detection and determination even when a pollutant cannot be completely separated from other compounds, and convenience in structural elucidation of unknown components.In this study, phenols at trace levels in wastewater were analyzed by gas chromatography - mass spectrometry in selected ion monitoring mode. To improve the sensitivity, silyl derivatization was employed and to improve the recovery yield, trimethylamine as salting agent was used in both solid phase extraction and liquid- liquid extraction methods.Some of polychlorinated dibenzo-p-dioxins (PCDDs) congeners were prepared by microscale pyrolysation of chlorophenates, and their structures were confirmed by gas chromatography - mass spectrometry. Gas chromatographic retention times for PCDDs increased with the increasing number of chlorines and that of vicinal chlorines whithin series of isomers. Thermolysis of PCDDs result in conversion to less chlorinated PCDDs under high temperature. The main decomposition pathways is reductive dechlorination and the chlorines in peri position are preferentially lost.

목차 Contents

• Chapter 1. Analysis of Chloro-and Nitro-Phenos in Wastewater using Gas Chromatography-Mass Spectrometry-Selected Ion Monitoring...11
• 1. Summary...12
• 2. Introduction...12
• 3. Experimental...13
• 4. Results and Discussion...15
• 5. Conclusion...18
• 6. References...19
• 7. Figure and Table Captions...20
• 8. Figures...21
• Chapter 2. Formation of Polychlorinated Dibenzo-p-Dioxins and Their Thermal Decomposition Products from Pyrolysis Reactions of Chlorophenates...32
• 1. Abstract...33
• 2. Introduction...33
• 3. Experimental...34
• 4. Results and Discussion...34
• 5. Conclusion...36
• 6. References...36
• 7. Figure and Table Captions...38
• 8. Figures...39
• Chapter 3. Formation of Tetra-chlorinated Dibenzo-p-Dioxins and Their Thermal Decomposition Products from Pyrolysis Reactions of Tri-chlorophenates...41
• 1. Abstract...42
• 2. Introduction...42
• 3. Experimental...43
• 4. Results and Discussion...44
• 5. Conclusion...46
• 6. References...47
• 7. Figure and Table Captions...48
• 8. Figures...49