Investigation on the humification of municipal solid waste incineration residue and its effect on the leaching behavior of dioxins
Investigation on the humification of municipal solid waste incineration residue and its effect on the leaching behavior of dioxins
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DOI：
10.1016/j.wasman.2004.04.004
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发表时间：
2004-01-01
期刊：
影响因子：
8.1
通讯作者：
Osako, M
中科院分区：
文献类型：
--
作者：
Kim, YJ;Osako, M
摘要本研究以城市生活垃圾焚烧残渣为研究对象，通过对腐殖化产物的鉴定，研究了垃圾焚烧残渣的腐殖化过程，并通过间歇浸出试验考察了二恶英的可降解性。样品为填埋后6-8年从蒸渗仪中挖出的焚烧残留物。腐殖物质的调查结果表明，从样品的颜色和提取物的光学特性来看，从表层到30-70 cm深度的土层中腐殖物质含量最高。试验结果表明，随着腐殖化程度的加深，二恶英的淋溶浓度逐渐增加，并与各层渗滤液中溶解有机碳（DOC）有较好的相关性。腐殖化作用首先从表层开始进行，腐殖化过程中生成的DOC可能优先携带高氯代二恶英化合物，如O 8 CDD，形成DOC-二恶英复合物。根据深度的内容和浸出浓度进行比较，我们观察到，不仅减少二恶英含量，但也增加了浸出的高氯二恶英在较深的层与堆肥的蒸渗仪。这种倾向似乎是生物活动的结果。(C)2004 Elsevier Ltd.保留所有权利。
in this study, we investigated the humification of municipal solid waste incineration residue through identification of extracted humic substances, and examined the leachability of dioxins by batch leaching test. The samples were incineration residues excavated from lysimeters 6-8 years after being filled. The results of investigation of humic substances showed that the top layers from the surface to a depth of 30-70 cm contained more humic substances than the other layers judging from the color of the samples and optical characteristics of the extracts. In particular, humification in the lysimeter filled with a small amount of compost had progressed through all the layers, not only the top one.The tests revealed that the leaching concentrations of dioxins increased with advanced humification and showed relatively good correlation to dissolved organic carbon (DOC) of leachate at each lysimeter. Humification advances from the surface first, and DOC generated from the humification may preferentially carry down the highly chlorinated dioxin compounds such as O8CDD as DOC-dioxin complexes. Comparing the content and leaching concentration according to depth, we observed not only a decrease in dioxin content but also an increase in leaching of the highly chlorinated dioxins at deeper layers in the lysimeters with the compost. This tendency seemed to result from biological activities. (C) 2004 Elsevier Ltd. All rights reserved.