Gandon-Ros Gerard, Nuñez Samuel S, Ortuño Nuria, Aracil Ignacio, Gómez-Rico María Francisca, Conesa Juan A
Institute of Chemical Process Engineering, University of Alicante, P.O. Box 99, E-03080 Alicante, Spain.
Department of Chemical Engineering, University of Alicante, P.O. Box 99, E-03080 Alicante, Spain.
Polymers (Basel). 2021 Mar 9;13(5):835. doi: 10.3390/polym13050835.
Persistent organic pollutant inhibition in the combustion process of polyvinyl chloride (PVC) by prior addition of an inhibitor is currently being studied, reducing the emission of pollutants, and thus reducing the large amount of waste PVC destined for landfill. In this work, the use of sewage sludge (SS) as an alternative to chemical inhibitors to improve the quality emissions of the incineration of polyvinyl chloride waste (PVC e-waste) was studied and optimized. Different combustion runs were carried out at 850 °C in a laboratory tubular reactor, varying both the molar ratio R (0.25, 0.50, 0.75) between inhibitors (N + S) and chlorine (Cl) and the oxygen ratio λ (0.15, 0.50) between actual oxygen and stoichiometric oxygen. The emissions of several semivolatile compounds families such as polycyclic aromatic hydrocarbons (PAHs), polychlorobenzenes (ClBzs), and polychlorophenols (ClPhs), with special interest in the emissions of the most toxic compounds, i.e., polychlorinated dibenzo--dioxins and polychlorinated dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs), were analyzed. A notable decrease in PCDD/F and dl-PCB formation was achieved in most of the experiments, especially for those runs performed under an oxygen-rich atmosphere (λ = 0.50), where the addition of sludge was beneficial with inhibition ratios Ri ≥ 0.25. An inhibition ratio of 0.75 showed the best results with almost a 100% reduction in PCDD/F formation and a 95% reduction in dl-PCB formation.
目前正在研究通过预先添加抑制剂来抑制聚氯乙烯（PVC）燃烧过程中的持久性有机污染物，以减少污染物排放，从而减少大量 destined for landfill 的废弃 PVC。在这项工作中，研究并优化了使用污水污泥（SS）替代化学抑制剂以提高聚氯乙烯废物（PVC 电子废物）焚烧质量排放的方法。在实验室管式反应器中于 850℃进行了不同的燃烧试验，改变抑制剂（N + S）与氯（Cl）之间的摩尔比 R（0.25、0.50、0.75）以及实际氧气与化学计量氧气之间的氧气比λ（0.15、0.50）。分析了几种半挥发性化合物家族的排放，如多环芳烃（PAHs）、多氯苯（ClBzs）和多氯酚（ClPhs），特别关注毒性最大的化合物的排放，即多氯二苯并 - 二恶英和多氯二苯并呋喃（PCDD/Fs）以及类二恶英多氯联苯（dl-PCBs）。在大多数实验中，PCDD/F 和 dl-PCB 的形成显著减少，特别是在富氧气氛（λ = 0.50）下进行的那些试验中，添加污泥是有益的，抑制率 Ri≥0.25。抑制率为 0.75 时显示出最佳结果，PCDD/F 的形成几乎减少了 100%，dl-PCB 的形成减少了 95%。
原文中“destined for landfill”表述不完整，推测可能是“destined for landfill disposal”之类，这里按字面翻译为“destined for landfill”。
