서지주요정보
자연산 점토와 실리카흄을 이용한 유해폐기물 안정화 방안 연구 = Stabilization/solidification of hazardous wastes using organophilic clay and silica-fume
서명 / 저자 자연산 점토와 실리카흄을 이용한 유해폐기물 안정화 방안 연구 = Stabilization/solidification of hazardous wastes using organophilic clay and silica-fume / 전관수.
저자명 전관수 ; Jun, Kwan-Soo
발행사항 [대전 : 한국과학기술원, 1995].
Online Access 제한공개(로그인 후 원문보기 가능)원문

소장정보

등록번호

8005704

소장위치/청구기호

학술문화관(문화관) 보존서고

DCE 95003

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

As one of major deficiencies in cement-based waste stabilization/solidification (S/S) processes is their difficulty in treating inorganic wastes containing organic material, reactive mineral admixtures and organophilic clays are studied as potential pozzolanic reagents and pre-solidification adsorbents of organic components. Cement-based stabilization/solidification of hazardous wastes containing heavy metal and organic has been investigated using chrome tannery waste. This work investigated the use of Na-bentonite and briquette ash as adsorbents for the organic components and heavy metals of industrial wastes, and silica-fume as an pozzolanic reagent to improve the solidified wastes with cement. Chrome tannery wastes containing up to 1.5% organic carbon and 1.2% chromium were treated with sodium bentonite and briquette ash. Organic components and heavy metal of wastes were well adsorbed by the adsorbents. Solidification of the waste/clay/silica-fume mixes produced a monolithic mass with high strength and very low leaching of the organic compounds and the metals. This study has shown that Na-bentonite and briquette ash could be successful adsorbents for the organic contaminant and heavy metals in industrial wastes and enabled them to be treated by cement-based solidification. Also the use of silica-fume to get high compressive strength and low penetration was highly effective. Cement-based solidification with the Na-bentonite, briquette ash, and silica-fume gave solid products which set rapidly and were far stronger and more homogeneous than the sole cement-based solidification. Leaching organic compounds and heavy metal from the stabilized products were very low. The TOC was reduced by 60% to 78% for the wastes tested compared with the conventional cement-based solidified waste, and the release of heavy metal was reduced by 52% to 70%. This paper presents microstructural studies of interactions between silica fume, Na-bentonite, containing adsorbed organically contaminated harzardous wastes, and a cement matrix. Such interactions must be as fully understood as possible if the long-term integrity of the silica fume/organophilic clay/cement mixes, in whatever formulation, is to be assured in S/S applications. The scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS) analysis of the wastes/OPC mix showed that the ettringite crystals were in needle shape deposited in the voids or on the surface of hydration material. Microstructural studies of solidified wastes with silica fume and/or Na-bentonite showed that their presence caused an inhibition to the ettringite formation. The results indicated that the incorporation of silica fume and/or Na-bentonite into the cement matrix minimized the detrimental effects of organic materials on the cement hydration reaction.

서지기타정보

서지기타정보
청구기호 {DCE 95003
형태사항 x, 127 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Kwan-Soo Jun
지도교수의 한글표기 : 신항식
지도교수의 영문표기 : Hang-Sik Shin
학위논문 학위논문(박사) - 한국과학기술원 : 토목공학과,
서지주기 참고문헌 : p. 122-127
주제 Hazardous waste.
Silica fume.
유해성. --과학기술용어시소러스
안정화. --과학기술용어시소러스
점토. --과학기술용어시소러스
Cement coating.
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