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계면활성제 공존시 MSW 소각장 비산재의 다이옥신 용출 거동
( Masahiro Osako ),( Yong-jin Kim ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.2
몇몇의 계면활성제 종류의 공동작용하에 처리 및 비처리 비산재이시로부터 다이옥신 용출반응은 batch 용출실험에 의해 조사되었고 계면활성제의 공존하의 환경상태의 소수성 유기오염물질(HOPs)의 최대 용출능 평가가 아니라 처리된 비산재로부터 다이옥신 용출능 감소률 평가이다. 계면활성제의 증가로 인한 다이옥신 용출능의 증가는 용출실험을 통해 알수있다. 이 실험을 통해 Ardrich humic acid은 계면활성제 사이에 표면 활성도가 가장 강하였다. 몇몇 방법에 의해 처리되어진 비산재의 용출능을 비교할 때 각각 처리되어진 비산재에 의한 계면활성제의 흡수에 의존한 용출능의 감소와는 다르다. The leaching behavior of dioxins from raw and treated fly ash (FA) under coexistence of several types of surface-active agents (SAA) was examined by batch leaching tests to obtain significant information not only for evaluating maximum leachability of hydrophobic organic pollutants (HOPs) under the severe environment in which SAAs coexist, but also for evaluating the reduction efficiency of dioxin leachability from the treated FA. Enhancement of dioxin leachability by the addition of SAAs was observed in the leaching test. Moreover, there was a large difference in the potential for leachability enhancement due to each CMC based on the chemical properties of the SAAs. Ardrich humic acid has the strongest surface activity among the SAAs used in this experiment. When comparing the leachability in FA that was treated by several methods, it was observed that there was also a difference in the reduction efficiency of leachability, depending on adsorption of SAAs by each treated FA.
( Yongjin Kim ),( Masahiro Osako ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.2
소각잔류 물질의 처리 및 처분에 관한 대부분의 이상적 처리/처분 방법은 유기, 무기 오염 물질의 안정화/환원/분해에 의해 자연환경에 저장시키는 것이다. 오염물의 안정화는 외부로 배줄될 수 있는 잠재성을 가지지 않도록 방지하고, 탄화 및 클레이 형성에 이해 금속을 고정 시키며, 휴믹화에 의해 유기물질을 안정화하는 것을 의미한다. 본 연구에서, 휴믹물질의 추출과 식별 및 SEM에 의한 미세구조의 관측을 통해 소각 잔재물의 고형화 가능성에 대하여 연구하였다. 본 연구에서는 모형 매립조에 채워진 후 5-7년 정도 된 시료를 채굴하여 시료로 하였다. 모형매립조는 다음과 같은 물질로 채워졌다. (1) 유기 또는 무기 약제 처리된 비산재 및 바닥재 혼합물, (2) 유기 또는 무기 약제 처리된 비산재, 바닥재, 파쇄 폐기물 및 MSW 퇴비의 5%를 혼합한 것, (3) 바닥재 휴믹 물질의 추출 및 연구 결과에서 표면으로부터 깊이 30-70cm의 상층에서는 소각의 냄새가 없으며, 약간의 잡초 뿌리 등을 포함하고 있다. 그러므로, 그 층은 추출물의 색과 광학적 특성으로 판단하는 다른 층에 비교하여 많은 휴믹 물질을 포함하고 있다. 특히, 약간의 퇴비가 채워진 모형 매립조의 휴믹화는 상층 뿐아니라 전층에서 진행되었다. SEM, EDX를 이용한 비산재의 표면변화를 관찰하였다. 퇴비와 혼합된 비산재는 풍부한 유기물에 의해 둘러 싸여져 있었으며, 반면에 퇴비가 없는 비산재는 소각 잔류물에서 발생된 풍부한 칼슘 물질로 둘러 싸여 있었다. 결과적으로, 퇴비와 같은 일정한 질의 유기물질이 소각 잔류물의 휴믹화 및 탄화를 포함한 고형화를 가속시키는 것으로 나타났다. The ideal method of treating or disposing of incineration residue is to restore it to the natural environment by stabilization, reduction and degradation of inorganic and organic pollutants. The stabilization of pollutants means preventing the possibility of spreading, which involves fixing metals by carbonation and clay formation, and stabilizing organic materials by humification. The authors call this the “soilification process”, to distinguish it from carbonation by aging. In this study, we investigated the possibility of soilification of incineration residue through extraction and identification of humic substances, and through observations of the microstructure by SEM. The samples used in this study were incineration residues excavated from lysimeters 5 to 7 years after filling. The lysimeters were filled with (1) mixtures of organic or inorganic agent-treated fly ash and bottom ash, (2) mixtures of organic or inorganic agent-treated fly ash, bottom ash, crushed wastes and 5% of MSW compost, and (3) only bottom ash. The results of extraction and investigation of humic substances showed that the top layers from the surface to a depth of 30-70 cm had no odor of incineration and contained the roots of some weeds, and so the layers contained a lot of humic substances compared with the other layers judging from the color and optical characteristics of the extracts. Especially, humification of the lysimeter filled with a little compost had progressed through all layers, not only the top layer. We also observed surface changes of fly ash by SEM (scanning electron microscope) and EDX (energy dispersive X-ray analysis). The fly ash mixed with compost was surrounded by organic-rich matter, while that without compost was surrounded by calcium-rich matter resulting from incineration residue. As a result, a certain quantity of organic matter such as compost appeared to have accelerated the soilification including humification and carbonation of incineration residues.
A CASE STUDY ON THE SOILIFICATION OF INCINERATION RESIDUE
( Yongjin Kim ),( Masahiro Osako ) 한국폐기물자원순환학회 2002 APLAS Vol.2002 No.1
The ideal method of treating or disposing of incineration residue is to restore it to the natural environment by stabilization, reduction and degradation of inorganic and organic pollutants. The stabilization of pollutants means preventing the possibility of spreading, which involves fixing metals by carbonation and clay formation, and stabilizing organic materials by humification. The authors call this the “soilification process”, to distinguish it from carbonation by aging. In this study, we investigated the possibility of soilification of incineration residue through extraction and identification of humic substances, and through observations of the microstructure by SEM. The samples used in this study were incineration residues excavated from lysimeters 5 to 7 years after filling. The lysimeters were filled with (1) mixtures of organic or inorganic agent-treated fly ash and bottom ash, (2) mixtures of organic or inorganic agent-treated fly ash, bottom ash, crushed wastes and 5% of MSW compost, and (3) only bottom ash. The results of extraction and investigation of humic substances showed that the top layers from the surface to a depth of 30-70 cm had no odor of incineration and contained the roots of some weeds, and so the layers contained a lot of humic substances compared with the other layers judging from the color and optical characteristics of the extracts. Especially, humification of the lysimeter filled with a little compost had progressed through all layers, not only the top layer. We also observed surface changes of fly ash by SEM (scanning electron microscope) and EDX (energy dispersive X-ray analysis). The fly ash mixed with compost was surrounded by organic-rich matter, while that without compost was surrounded by calcium-rich matter resulting from incineration residue. As a result, a certain quantity of organic matter such as compost appeared to have accelerated the soilification including humification and carbonation of incineration residues.