National Center for Environmental Research and Training, National Institute of Ecology, Av. Periférico Sur No. 5000, Coyoacán, Distrito Federal, Mexico.
Chemosphere. 2012 May;87(9):1003-8. doi: 10.1016/j.chemosphere.2011.11.038. Epub 2011 Dec 20.
Open burning for waste disposal is, in many countries, the dominant source of polychlorinated dibenzodioxins, dibenzofurans and biphenyls (PCDD/PCDF/PCB) release to the environment. To generate emission factors for open burning, experimental pile burns of about 100 kg of household waste were conducted with emissions sampling. From these experiments and others conducted by the same authors it is found that less compaction of waste or active mixing during the fire--"stirring"--promotes better combustion (as evidenced by lower CO/CO(2) ratio) and reduces emissions of PCDD/PCDF/PCB; an intuitive but previously undemonstrated result. These experiments also support previous results suggesting PCDD/PCDF/PCB generation in open burning - while still highly variable - tends to be greater in the later (smoldering) phases of burning when the CO/CO(2) ratio increases.
在许多国家，露天焚烧是多氯二苯并对二恶英、多氯二苯并呋喃和多氯联苯（PCDD/PCDF/PCB）向环境释放的主要来源。为了生成露天焚烧的排放因子，进行了约 100 公斤的生活垃圾实验堆焚烧和排放采样。从这些实验和同一作者进行的其他实验中发现，废物压实程度较低或火灾期间的主动混合——“搅拌”——促进了更好的燃烧（表现为较低的 CO/CO(2) 比值），并减少了 PCDD/PCDF/PCB 的排放；这是一个直观但以前未证明的结果。这些实验还支持了先前的结果，表明在露天焚烧中生成 PCDD/PCDF/PCB——尽管仍然高度可变——在 CO/CO(2) 比值增加时，燃烧的后期（闷烧）阶段往往更大。
