Formation of toxic chemicals including dioxin-related compounds by combustion from a small home waste incinerator.
Formation of toxic chemicals including dioxin-related compounds by combustion from a small home waste incinerator.
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DOI：
10.1016/j.chemosphere.2005.04.060
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发表时间：
2006
期刊：
影响因子：
8.8
通讯作者：
T. Nakao;O. Aozasa;S. Ohta;H. Miyata
中科院分区：
文献类型：
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作者：
T. Nakao;O. Aozasa;S. Ohta;H. Miyata
我们调查了在一个小型的家庭垃圾焚烧炉燃烧和分析了烟气和残余灰形成的二恶英相关化合物多氯二苯并二恶英，多氯二苯并呋喃，和共面多氯联苯及其前体多氯苯，多氯苯酚，多氯二苯醚，多氯联苯。特别是，我们调查了焚烧材料的组合物上的释放的化合物和每种化合物的所有同源物的总浓度的同源物的比例的效果。准备了八种不同的样品进行焚烧，其中四种样品完全由纸、枯叶、天然木材或建筑材料组成。其余四个样品主要含有纸张，但也含有其他成分，如纤维，不含氯塑料，含氯塑料和铜电线。燃烧样品中不含氯的塑料的存在并没有增加二恶英或二恶英前体的排放总量。相比之下，含氯塑料导致烟道气和残余灰烬中多氯二恶英的总释放量增加数倍。铜线导致多氯二恶英和二恶英前体释放总量进一步增加数倍，但有一个例外：添加含氯塑料导致多氯联苯增加数倍，但进一步添加铜后仅略有增加（2.52%）。随着含氯塑料和铜的加入，同源比率倾向于更高的氯化合物，但结果远非均匀。我们的研究结果表明，有毒的二恶英释放从小型家庭垃圾焚烧炉必须被认为是显着的，特别是如果即使是少量的含氯塑料或铜燃烧。
We investigated combustion in a small home waste incinerator and analyzed both flue gas and residual ash for formation of the dioxin-related compounds polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and coplanar polychlorinated biphenyls and their precursors polychlorinated benzenes, polychlorinated phenols, polychlorinated diphenyl ethers, and polychlorinated biphenyls. Particularly, we investigated the effect of the incinerated material’s composition on both the congener ratios of released compounds and the total concentration of all congeners of each compound. Eight different samples were prepared for incineration with four samples consist entirely paper, dead leaves, natural wood, or building materials. The remaining four samples contained mostly paper, but also other components such as fiber, non-chlorine-containing plastics, chlorine-containing plastics, and copper electric wire. The presence of non-chlorine-containing plastic in combustion samples did not increase overall dioxin or dioxin-precursor emissions. In contrast, chlorine-containing plastic resulted in a several-fold increase in total polychlorinated dioxins released, in both flue gas and residual ash. Copper wire resulted in a further several-fold increase in total polychlorinated dioxins and dioxin precursors released, with one exception: the addition of chlorine-containing plastic resulted in a many-fold increase in polychlorinated biphenyls, but only a modest further increase (∼52%) with the further addition of copper. Homologue ratios tended toward higher-chlorine compounds as chlorine-containing plastic and Cu were added, but the results were far from uniform. Our results show that toxic dioxin release from small home waste incinerators must be considered significant, especially if even small amounts of chlorine-containing plastics or copper are burned.