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首页> 外文期刊>Chemosphere >Destruction and formation of polychlorinated dibenzo-p-dioxins and dibenzofurans during pretreatment and co-processing of municipal solid waste incineration fly ash in a cement kiln
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Destruction and formation of polychlorinated dibenzo-p-dioxins and dibenzofurans during pretreatment and co-processing of municipal solid waste incineration fly ash in a cement kiln

机译：水泥窑中城市固体垃圾焚烧飞灰的预处理和共处理过程中，多氯联苯对二恶英和二苯并呋喃的破坏和形成

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During a three-day industrial trial, municipal solid waste incineration fly ash (FA) was co-processed in a cement kiln after water-washing pretreatment for waste-to-resource conversion. All inputs and outputs were sampled to obtain the dioxin fingerprints. During washing, the relative contents of polychlorinated dibenzo-p-dioxins and dibenzofurans in FA, washed FA and sludge were basically the same and only a simple physical migration resulted. During drying, only physical processes resulted, which included volatilization and migration. Minimal dioxins residue remained in the clinker, cement kiln dust and flue gas, and the dioxins degraded completely. Through co-processing, the dioxins degraded obviously. The main compounds synthesized include 1,2,3,4,7,8-hepta-chlorodibenzo-p-dioxin, 2,3,7,8-tetra- chlor-odibenzofuran and octa-chlorodibenzofuran. A comparison of dioxins fingerprints in the clinker, cement kiln dust and flue gas under baseline and co-processing conditions showed that co-processing had no effect on the cement kiln production. The baseline sample also contained a certain amount of dioxins, possibly because of the 'memory effect' and heterogeneous formations. The dioxins concentrations in the clinker and FA were far lower than the national standards. Thus, no environmental risk results during co-processing. (C) 2018 Elsevier Ltd. All rights reserved.
机译：在为期三天的工业试验中，在水洗预处理后将城市固体废物焚烧飞灰（FA）在水泥窑中进行了共处理，以实现废物到资源的转化。采样所有输入和输出以获得二恶英指纹。洗涤过程中，FA，洗涤后的FA和污泥中多氯二苯并-对-二恶英和二苯并呋喃的相对含量基本相同，仅导致简单的物理迁移。在干燥过程中，仅产生物理过程，包括挥发和迁移。残留在熟料，水泥窑粉尘和烟道气中的二恶英残留量最小，二恶英完全降解。通过共处理，二恶英明显降解。合成的主要化合物包括1,2,3,4,7,8-庚-氯二苯并-对二恶英，2,3,7,8-四氯-二苯并呋喃和八-氯二苯并呋喃。在基线和协同处理条件下，对熟料，水泥窑粉尘和烟气中二恶英指纹图谱的比较表明，协同处理对水泥窑的生产没有影响。基线样品还包含一定量的二恶英，可能是由于“记忆效应”和异质形成所致。熟料和FA中的二恶英浓度远低于国家标准。因此，在协同处理期间不会导致环境风险。 （C）2018 Elsevier Ltd.保留所有权利。

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