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PCDD and PCDF emissions from simulated sugarcane field burning

机译：模拟甘蔗田间燃烧产生的PCDD和PCDF排放

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摘要

The emissions from simulated sugarcane (Saccharum officinarum) field burns were sampled and analyzed for polychlorinated dibenzodioxins and dibenzofurans (PCDDs and PCDFs). Sugarcane leaves from Hawaii and Florida were burned in a manner simulating the natural physical dimensions and biomass density found during the practice of preharvest field burning. Eight composite burn tests consisting of 3-33 kg of biomass were conducted, some with replicate samplers. Emission factor calculations using sampled concentration and measured mass loss compared well to rigorous carbon balance methods commonly used in field sampling. The two sources of sugarcane had distinctive emission levels, as did tests on separate seasonal gatherings of the Florida sugarcane. The average emission factor for two tests of Hawaii sugarcane was 253 ng toxic equivalents (TEQ)/kg of carbon burned (ng TEQ/kg(Cb)) (rsd = 16%) and for two gatherings of Florida sugarcane was 25 ng TEQ/kg(Cb) (N = 4, rsd = 50%) and 5 ng TEQ/kg(Cb) (N = 2, rsd = 91%). The Hawaii sugarcane, as well as most of the Florida sugarcane, had emission values which were well above the value of 5 ng TEQ/kg(Cb) commonly attributed to biomass combustion. Application of this emission factor range to the amount of U.S. sugarcane fields burned suggests that this practice may be a relatively minor source of PCDDs and PCDFs in the U.S. national inventory, but the limited sample size and range of results make this conclusion tenuous.
机译：对模拟甘蔗田（Saccharum officinarum）田间焚烧的排放物进行采样并分析多氯代二苯并二恶英和二苯并呋喃（PCDD和PCDF）。来自夏威夷和佛罗里达的甘蔗叶以模拟自然物理尺寸和收获前田间燃烧过程中发现的生物量密度的方式进行燃烧。进行了八项由3-33千克生物质组成的复合燃烧测试，有些使用了重复采样器。使用采样浓度和测得的质量损失进行的排放因子计算与现场采样中常用的严格碳平衡方法进行了比较。两种来源的甘蔗都有不同的排放水平，对佛罗里达甘蔗的单独季节性采集进行的测试也是如此。夏威夷甘蔗的两次测试的平均排放因子为253 ng有毒当量（TEQ）/ kg燃烧的碳（ng TEQ / kg（Cb））（rsd = 16％），佛罗里达州的两次采集的平均排放因子为25 ng TEQ / kg（Cb）（N = 4，RSD = 50％）和5 ng TEQ / kg（Cb）（N = 2，RSD = 91％）。夏威夷甘蔗以及佛罗里达州的大多数甘蔗的排放值均远高于通常归因于生物质燃烧的5 ng TEQ / kg（Cb）。将该排放因子范围应用于美国甘蔗田的燃烧量表明，这种做法在美国国家清单中可能是PCDD和PCDF的相对次要来源，但是有限的样本量和结果范围使这一结论变得微不足道。

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  • 来源
    《Environmental Science & Technology》 |2006年第20期|p. 6228-6234|共7页
  • 作者

    Gullett BK; Touati A; Huwe J; Hakk H;

  • 作者单位

    US EPA, Off Res & Dev, Natl Risk Management Res Lab, Res Triangle Pk, NC 27711 USA;

    ARCADIS Geraghty & Miller Inc, Res Triangle Pk, NC 27709 USA;

    USDA ARS, Univ Stn, Fargo, ND 58105 USA;

  • 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 环境化学;
  • 关键词

    PARTICULATE MATTER; AEROSOLS; FOREST; WASTE;

    机译：颗粒物;气溶胶;森林;废物;

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