하수슬러지 소각 비산재를 이용한 제올라이트의 합성 = Synthesis of Zeolite from Sewage Sludge Incinerator Fly Ash.

다국어 초록 (Multilingual Abstract)

This study is about zeolite synthesis from the sewage sludge incinerator fly ash of "S" sewage treatment center located in Seoul. For this purpose, the properties of the raw fly ash as starting material, the hydrothermal conditions for zeolite synthesis and the environmental applicabilities of synthesized zeolites were examined. The results are as followings ;

1. The fly ash from sewage sludge incinerator has large quantity of SiO2 and Al2O3 and their contents are 42.8 wt.% and 21.2 wt.% respectively. So the fly ash is considered to be possible starting material for zeolite synthesis. But according to the XRD analysis, Si-bearing phase is composed mainly of quartz matrix that is relatively not favorable to zeolite synthesis than glass matrix.

2. The results from leaching test of the fly ash showed that the concentration of hazardous metals were very low as compared with the Korea leaching standard of the Waste Management Law. But the concentration from total recoverable test of the fly ash were higher than the fertilizer standard of Fertilizer Management Law.

3. Major zeolite products synthesized by hydrothermal reaction are analcime in teflon vessel and zeolite P1 in borosilicate flask respectively. Optimum conditions for the synthesis of analcime were 1N of NaOH concentration, 16 hour of reaction time and 135℃ of reaction temperature. For the zeolite P1 formation, the proper conditions were demonstrated to be 5N of NaOH concentration, 16 hour reaction time and 130℃ of reaction temperature in this study.
4. Hazardous metal contents in the analcime product are similar with those in the raw fly ash. In case of the zeolite P1, the contents are reduced to nearly a half. But these zeolite products are not yet applicable as a fertilizer or a soil conditioner.

5. The raw fly ash and the analcime product showed NH4+ ion exchange capacity of 0~1.0 mg of NH4+g-1 and 3.0~7.4 mg of NH4+g-1, respectively. However, the zeolite P1 product reached exchange capacity to 14.6~17.8 mg of NH4+g-1. This values are in the range of those of natural clinoptilolite and phillipsite. From this point of view, zeolite synthesis from sewage treatment sludge incinerator fly ash is a good alternative for solid waste recycling.




Key Word : Sewage sludge incinerator fly ash, Zeolite synthesis, Analcime, Zeolite P1, NH4+ ion exchange capacity

목차 (Table of Contents)

• 국문요약 ⅰ
• 목 차 ⅲ
• List of Tables ⅴ
• List of Figures ⅵ
• 1. 서론 1
• 1.1 연구배경 및 목적 1
• 1.2 연구내용 및 범위 2
• 2. 이론적 배경 4
• 2.1 제올라이트 4
• 2.1.1 제올라이트 개요 4
• 2.1.2 제올라이트의 조성과 구조 6
• 2.1.3 제올라이트의 양이온 교환 15
• 2.2 제올라이트 합성 22
• 2.2.1 제올라이트 합성의 개요 22
• 2.2.2 제올라이트의 결정화(crystallization) 23
• 2.2.3 제안된 제올라이트 합성 메카니즘 27
• 2.2.4 제올라이트 합성에 영향을 주는 인자 28
• 3. 실험재료 및 방법 32
• 3.1 합성재료 32
• 3.2 실험방법 32
• 3.2.1 제올라이트 합성 32
• 3.2.2 Zeolite 생성물의 특성 조사 36
• 4. 결과 및 고찰 37
• 4.1 출발물질의 특성 37
• 4.2 제올라이트 합성 42
• 4.2.1 Teflon 재질의 반응용기를 이용한 제올라이트 합성 42
• 4.2.2 Borosilicate 재질의 반응용기를 이용한 제올라이트 합성 49
• 4.3 제올라이트 생성물의 중금속 함유량 54
• 4.4 제올라이트 생성물과 암모늄 이온과의 이온교환량 56
• 5. 결론 58
• 참고문헌 60
• Abstract 63