...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Estimating the Atmospheric Deposition of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans from Soils
【24h】

Estimating the Atmospheric Deposition of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans from Soils

机译：估算土壤中多氯联苯对二恶英和二苯并呋喃的大气沉降

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) were studied in soils to determine if, and under what conditions, soil acts as a conservative matrix forthe collection of atmospheric deposition. Studies of four soil cores showed that 80% of the PCDD/F load was contained in the top 15 cm of the core. Concentrations were highly correlated with organic carbon, indicating that sorption to organic carbon is the dominant mechanism. Study of two other cores did not exhibit this behavior due to low soil organic carbon and to heavy PCDD/F loading from the atmosphere. Soils and lake sediments were collected in similar geographic regions, and the soil-derived and lake sediment-derived PCDD/F fluxes were compared. The percent relative standard deviation of four soil-lake sediment pairs ranged from ±1% to ±26%, and the fluxes ranged from 180 to 990 ng m~(-2) yr~(-1). Comparison of homologue profiles also showed good agreement. Analysis of field duplicate soil samples gave percent relative standard deviations ranging from ±5% to ±59% with fluxes ranging from 2 to 470 ng m~(-2) yr~(-1). The results of this study suggest that soils can be used to estimate the deposition of PCDD/F from the atmosphere. This will allow us to easily expand the worldwide database of PCDD/F flux estimates.
机译：在土壤中研究了多氯二苯并-对-二恶英和二苯并呋喃（PCDD / F），以确定土壤是否以及在什么条件下充当收集大气沉积物的保守基质。对四个土壤岩心的研究表明，PCDD / F载荷的80％包含在岩心的顶部15 cm。浓度与有机碳高度相关，表明对有机碳的吸附是主要机制。由于土壤有机碳含量低以及大气中PCDD / F的负荷过大，对其他两个岩心的研究没有表现出这种行为。在相似的地理区域内收集土壤和湖泊沉积物，并比较了土壤和湖泊沉积物的PCDD / F通量。四个土壤-湖泊沉积物对的相对标准偏差百分比在±1％至±26％之间，通量范围在180至990 ng m〜（-2）yr〜（-1）之间。同源物谱的比较也显示出良好的一致性。野外重复土壤样品的分析得出相对标准偏差百分比为±5％至±59％，通量范围为2至470 ng m〜（-2）yr〜（-1）。这项研究的结果表明，土壤可用于估算大气中PCDD / F的沉积。这将使我们能够轻松扩展PCDD / F通量估计值的全球数据库。

著录项

  • 来源
    《Environmental Science & Technology》 |1995年第8期|p.2090-2098|共9页
  • 作者

    LOUIS P. BRZUZY; RONALD A. HITES;

  • 作者单位

    School of Public and Environmental Affairs and Department of Chemistry, Indiana University, Bloomington, Indiana 47405;

  • 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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号