TOXIC COMBUSTION BY-PRODUCTS FROM THE INCINERATION OF CHLORINATED HYDROCARBONS AND PLASTICS
TOXIC COMBUSTION BY-PRODUCTS FROM THE INCINERATION OF CHLORINATED HYDROCARBONS AND PLASTICS
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DOI：
10.1016/0045-6535(94)90212-7
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发表时间：
1994-01-01
期刊：
影响因子：
8.8
通讯作者：
YANG, GS
中科院分区：
文献类型：
--
作者：
BLANKENSHIP, A;CHANG, DPY;YANG, GS
用热重分析仪对聚偏二氯乙烯和聚氯乙烯进行热解，并收集副产物进行化学分析和生物测定。三氯乙烯也用不同浓度的氯化化合物在甲烷的层流扩散火焰中燃烧。采用气相色谱-质谱联用技术对过滤器上收集的烟尘颗粒和吸附管上收集的火焰后气体进行了提取和分析。使用对2,3,7,8-四氯二苯并-对二恶英敏感的体外过度角化生物测定法评估提取物的潜在毒性。化学分析发现多环芳烃和氯化多环芳烃是主要的热解产物。由这两种聚合物热解产生的产物产生了明确的阳性生物测定反应。从三氯乙烯火焰中获得的大多数产物与火焰释放的烟灰颗粒有关。主要产品有六氯环戊二烯、氯化苯、多环芳烃、杂化烯等一系列氯化芳香族化合物。二氯甲烷提取液的生物测定反应为阳性。
Polyvinylidene chloride and polyvinyl chloride were pyrolyzed in a thermal gravimetric analyzer and by-products were collected for chemical analysis and bioassay. Trichloroethylene was also burned in a laminar diffusion flame of methane with varying concentrations of the chlorinated compound. Soot particulates collected on filters and post-flame gases collected on sorbent tubes were extracted and analyzed using gas chromatography-mass spectrometry. Extracts were evaluated for potential toxicity using an in vitro hyperkeratinization bioassay that is sensitive to 2,3,7,8-tetrachlorodibenzo-p-dioxin. Chemical analyses identified polycyclic aromatic hydrocarbons and chlorinated PAHs as the major pyrolysis products. Products generated from the pyrolysis of both polymers yielded definite positive bioassay responses. Most of the products obtained from the trichloroethylene flame were associated with soot particles emitted from the flame. A series of chlorinated aromatic compounds, including hexachlorocyclopentadiene and chlorinated benzenes, polycyclic aromatics, and fulvalenes were identified as major products. Dichloromethane extracts of the soots elicited a positive bioassay response.