Toward a time trend analysis of dioxin emission and exposure
Toward a time trend analysis of dioxin emission and exposure
复制标题
二恶英排放和暴露的时间趋势分析
DOI：
--
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
S. Masunaga
中科院分区：
文献类型：
--
作者：
S. Masunaga
对旧农用化学品样品中的二恶英杂质进行了分析。一些除草剂被2,3,7,8-氯取代的二恶英同系物污染。利用这些新数据以及文献中报告的杂质和排放数据，估算了使用氯化芳香族化合物和一些焚烧活动产生的二恶英排放的时间趋势。结果表明，20世纪60年代和1970年代二恶英排放量较高，然后二恶英排放量（PCDD/Fs）和毒性当量（TEQ）均下降。除草剂是高排放期的主要来源。 20世纪80年代中期以后，焚烧源成为主要来源。过去 40 年环境中二恶英排放总量的重要性顺序估计为氯硝基苯酚 (CNP) > 五氯苯酚 (PCP) > 城市固体废物焚烧 (MSWI) ≅ 工业废物焚烧 (IWI)（以 PCDD/F 计），以及 PCP > CNP > PCB > MSWI （以 I-TEQ 计）≅ IWI。
Old agrochemical samples were analyzed for their dioxin impurities. Some herbicides were contaminated with 2,3,7,8-chlorine-substituted dioxin congeners. Using these new data as well as impurity and emission data reported in the literature, the time trends for dioxin emissions from the use of chlorinated aromatic compounds and some incineration activities have been estimated. The results indicate that dioxin emission was high during 1960s and 1970s and then decreased in terms of both amount of dioxin (PCDD/Fs) and toxic equivalent (TEQ). Herbicides were the major sources in the high emission period. After the mid-1980s, incineration sources became major. The order of importance in terms of total dioxin emission into the environment during the past 40 years is estimated to be chloronitrofen (CNP) > pentachlorophenol (PCP) > municipal solid waste incineration (MSWI) ≅ industrial waste incineration (IWI) in terms of PCDD/Fs and PCP > CNP > PCB > MSWI ≅ IWI in terms of I-TEQ.