論文

査読有り
2010年8月

Distributions of polycyclic aromatic hydrocarbons in a sediment core from the north basin of Lake Biwa, Japan

Organic Geochemistry
  • Nobuyasu Itoh
  • ,
  • Shuji Tamamura
  • ,
  • Michio Kumagai

41
8
開始ページ
845
終了ページ
852
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.orggeochem.2010.04.002
出版者・発行元
Elsevier BV

We analyzed the vertical distributions of 19 polycyclic aromatic hydrocarbons (PAHs), total organic carbon (TOC), total nitrogen (TN) and stable carbon isotope ratio (delta(13)C) in a 27 cm sediment core from the north basin of Lake Biwa in order to elucidate changes in PAH sources and events possibly affecting the lake over the last few decades. Both TOC and TN increased gradually from the deepest layer (TOC, 1.2 wt.%; TN, 0.14 wt.%) to the uppermost layer (TOC, 4.0 wt.%; TN, 0.45 wt.%). The TOC/TN ratio, a useful indicator for distinguishing between aquatic and terrestrial plant sources, increased remarkably at 1113 cm (10.3-11.1 vs. 8.5-9.7 at other depths), indicating that large amounts of terrestrial material entered the lake when that layer was deposited. All PAHs except perylene gradually increased from the deepest layer, but not as clearly as TOC and TN. At 11-13 cm, all PAHs except perylene transiently decreased and perylene transiently increased. Since the PAH ratios used for the elucidation of sources did not change greatly throughout the core, we consider that the major source of PAHs in the lake has not changed during the last few decades. The brief decrease in PAHs at 11-13 cm could be the result of dilution by a large input of terrestrial material, which brought in perylene. (C) 2010 Elsevier Ltd. All rights reserved.

リンク情報
DOI
https://doi.org/10.1016/j.orggeochem.2010.04.002
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000280614600012&DestApp=WOS_CPL
ID情報
  • DOI : 10.1016/j.orggeochem.2010.04.002
  • ISSN : 0146-6380
  • Web of Science ID : WOS:000280614600012

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