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Dioxins released from chemical accidents

机译：化学事故中释放出的二恶英

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摘要

Discrepancies in environmental budgets of dioxrn-like compounds may be explained by emissions from accidents involving chlorinated organic chemicals. This source may have important implications for regulation inventories. FEW chemicals cause as much concern and controversy as the toxic and environmentally persistent dioxin-like compounds, a group that includes the dibenzo-dioxins and dibenzo-furans (generically known as the dioxins) and coplanar polychlorinated biphenyls (PCBs). Dioxins have never been made for commercial purposes (other than as environmental standards) but they arise as trace pollutants in the manufacture, use and disposal of chlorinated organic compounds. The" amount of dioxins in the environment increased markedly following the expansion of the chlorine-based sector of the chemical industry in the 1940s~2. From the 1950s to the late 1970s, PCBs were made in large quantities and widely used as commercial transformer and capacitor fluids, but their production is now banned in many parts of the world because of alarms about environmental contamination.
机译：类似于二恶英类化合物的环境预算差异可能由涉及氯化有机化学物的事故排放引起。该来源可能对监管清单有重要影响。 FEW化学品引起的毒性和环境持久性的二恶英样化合物引起了同样的关注和争议，二恶英类化合物包括二苯并二恶英和二苯并呋喃（通常称为二恶英）和共面多氯联苯（PCB）。二恶英从来没有用于商业目的（除了作为环境标准），而是在制造，使用和处置氯化有机化合物时作为痕量污染物而产生的。随着1940s〜2化工行业中基于氯的行业的扩张，环境中的二恶英数量显着增加。从1950年代到1970年代后期，PCB大量生产并广泛用作商业变压器和电容器液，但由于有关环境污染的警报，现在世界上许多地方都禁止生产电容器液。

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  • 来源
    《Nature》 |1995年第6530期|p.353-354|共2页
  • 作者

    Andrew A. Meharg; Daniel Osborn;

  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
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