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首页> 外文会议>International symposium on halogenated persistent organic pollutants >RECORDS OF POLYCHLORINATED DIBENZO-P-DIOXINS (PCDD), AND DIBENZO-PFURANS (PCDF) IN SEDIMENT CORE FROM AN URBAN LAKE IN CENTRAL CHILE
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RECORDS OF POLYCHLORINATED DIBENZO-P-DIOXINS (PCDD), AND DIBENZO-PFURANS (PCDF) IN SEDIMENT CORE FROM AN URBAN LAKE IN CENTRAL CHILE

机译：智利中部城市湖泊沉积物中多氯联苯对二恶英（PCDD）和二苯并呋喃（PCDF）的记录

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摘要

Dated sediment cores provide an excellent way to investigate the historical input of persistent organic pollutants into the environment and to identify possible sources of pollution. The vertical distribution of Polychlorinated dibenzo-pdioxins (PCDD), and dibenzo-p-furans (PCDF) was investigated in sediment cores from Chica de San Pedro Lake in central Chile to elucidate their historical trend inputs over the last fifty years. Sediment cores were analysed for PCDD/F using HRGC/MS and radioisotopically dated using 210Pb. Organic carbon content (OC) was also measured. Results showed that average PCDD/F (pg g-1 dry weight (d.w.)) concentration was 765 ±551. The percentage of organic carbon was not variable with an average value of 8 ± 1. Analysis of PCDD/F congener composition identified a common pattern of Dioxins. High chlorinated PCDD/F (OCDD and OCDF) were the most abundant congeners, accounting for 70-90% of the total PCDD/Fs composition. Historical deposition patterns indicate a decrease of PCDD/F down the sediment core, with the highest pick detected during 1996 (62 pg cm2 year-1) and 1970 (57). These results are in agreement with the history of industrial activities and other settlements of this Region. Since, the Chica of San Pedro Lake is not directly affected by industrial activities the loading of PCDD/Fs into the lake sediments might be influenced mostly by atmospheric transport and deposition processes. This data are a useful contribution to the knowledge of PCDD/F levels in Chile.
机译：过时的沉积物核芯是研究持久性有机污染物向环境中的历史输入并确定可能的污染源的极好方法。在智利中部奇卡德圣佩德罗湖的沉积岩心中研究了多氯二苯并二恶英（PCDD）和二苯并对呋喃（PCDF）的垂直分布，以阐明其过去五十年的历史趋势输入。使用HRGC / MS分析沉积物核的PCDD / F，并使用210Pb进行放射性同位素测年。还测量了有机碳含量（OC）。结果显示平均PCDD / F（pg g-1干重（d.w.））浓度为765±551。有机碳的百分比没有变化，平均值为8±1。对PCDD / F同类物的分析确定了二恶英的常见模式。高氯化物PCDD / F（OCDD和OCDF）是最丰富的同类物，占PCDD / Fs总量的70-90％。历史沉积模式表明，沉积物核心向下的PCDD / F下降，在1996年（62 pg cm2 year-1）和1970年（57）检测到最高采出量。这些结果与该地区工业活动和其他定居点的历史相吻合。由于San Pedro湖的奇卡河不受工业活动的直接影响，因此PCDD / Fs进入湖底沉积物的负荷可能主要受大气传输和沉积过程的影响。这些数据对智利的PCDD / F含量知识很有帮助。

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  • 来源
  • 会议地点 Beijing(CN)
  • 作者

    Pozo K; Mariottini M; Barra R; Lazzerini F; Monti M L; Urrutia R; Parra O; Focardi S;

  • 作者单位

    Department of Environmental Sciences,University of Siena,Via Mattioli 4,53100,Siena,Italy;

    Department of Environmental Sciences,University of Siena,Via Mattioli 4,53100,Siena,Italy;

    Center for Environmental Sciences EULA-Chile,Universidad de Concepción,Barrio Universitario s,casilla 160-C,Concepción,Chile;

    Department of Environmental Sciences,University of Siena,Via Mattioli 4,53100,Siena,Italy;

    Department of Environmental Sciences,University of Siena,Via Mattioli 4,53100,Siena,Italy;

    Center for Environmental Sciences EULA-Chile,Universidad de Concepción,Barrio Universitario s,casilla 160-C,Concepción,Chile;

    Center for Environmental Sciences EULA-Chile,Universidad de Concepción,Barrio Universitario s,casilla 160-C,Concepción,Chile;

    Department of Environmental Sciences,University of Siena,Vi;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境分析化学;
  • 关键词

    PCDD/F; sediments; Chica de San Pedro Lake; 210Pb;

    机译：PCDD / F;沉积物; Chica de San Pedro Lake; 210Pb;

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