青藏高原多环芳烃(PAHs)湖泊沉积记录
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- 英文论文题名：Sedimentary records of polycyclic aromatic hydrocarbons(PAHs) in remote lakes across the Tibetan Plateau
- 论文作者：周瑞辰 ; 杨瑞强 ; 景传勇
- 英文论文作者：Rui-Chen Zhou ; Rui-qiang Yang ; Chuan-yong Jing ; Research Centre for Eco-Environmental Sciences ; CAS
- 年：2016
- 作者机构：中国科学院生态环境研究中心;
- 论文关键词：青藏高原 ; 多环芳烃 ; 沉积物
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十六分会：环境化学
- 语种：中文
- 分类号：X524
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十六分会 ; 环境化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：261k
- 原文格式：D
- 会议级别：全国
摘要
偏远地区湖泊沉积物是研究历史环境事件的重要载体。本研究采集了青藏高原南北剖面5个湖泊的沉积物,重建了百年尺度多环芳烃(PAHs)的时间趋势。PAHs的输入通量总体呈现持续增加的趋势。沉积物中PAHs主要以轻组分(2-3环芳烃)为主(平均占87%),但值得注意的是近年来较重组分(4-6环芳烃)的百分含量持续增加(Fig.1),表明西藏本地高温燃烧源的贡献在显著增加。
Sediment cores from five lakes across the Tibetan Plateau were used as natural archives to study the time trends of polycyclic aromatic hydrocarbons(PAHs).The depositional flux of PAHs generally showed an increasing trend from the deeper layers towards the upper layer sediments.The fluxes of PAHs were low with little variability before the 1950 s,and then gradually increased to the late 1980 s,with a faster increasing rate after the 1990 s.PAHs are dominated by the lighter 2&3-ring homologues with the averaged percentage over 87%,while it is notable that the percentage of heavier 4-6 ring PAHs generally increased in recent years,which suggests the contribution of local high-temperature combustion sources becoming more predominant.
Sediment cores from five lakes across the Tibetan Plateau were used as natural archives to study the time trends of polycyclic aromatic hydrocarbons(PAHs).The depositional flux of PAHs generally showed an increasing trend from the deeper layers towards the upper layer sediments.The fluxes of PAHs were low with little variability before the 1950 s,and then gradually increased to the late 1980 s,with a faster increasing rate after the 1990 s.PAHs are dominated by the lighter 2&3-ring homologues with the averaged percentage over 87%,while it is notable that the percentage of heavier 4-6 ring PAHs generally increased in recent years,which suggests the contribution of local high-temperature combustion sources becoming more predominant.
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