English  |  正體中文  |  简体中文  |  Items with full text/Total items : 18055/20253 (89%)
Visitors : 24694579      Online Users : 438
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/34320

    標題: A comparison of atmospheric geochemistry through lichens from volcanic and non-volcanic areas, north Taiwan
    作者: Lin, Le-Qi
    Lu, Hsueh-Yu
    Pi, Ju-Lien
    Liou, Tai-Sheng
    Chen, Wen-Fu
    Hsieh, Pei-Shan
    貢獻者: Natl Chung Cheng Univ, Dept Earth & Environm Sci
    SUNY Buffalo, Dept Mech & Aerosp Engn, Buffalo
    Chia Nan Univ Pharm & Sci, Dept Tourism & Management
    Ind Technol Res Inst, Green Energy & Environm Res Labs
    關鍵字: Northern Taiwan
    lichens as bioindicators
    rare earth elements
    lead isotopes
    日期: 2021
    上傳時間: 2023-11-11 11:43:08 (UTC+8)
    摘要: Lichens are abundant with functional groups that are capable of adsorbing dissolved metals in moisture and intercepting suspended particles in the atmosphere. Using lichen chemistry as an indicator is a prominent method of assessing a long-term baseline of atmospheric quality. This study collected foliose lichens, Parmelia sp., from an area with intensive post-volcanic activity (Tatun Volcano Group) and a deep mountain trail (Nan-ao Trail) in northern Taiwan. The geochemical results show that the lichens from Nan-ao have much higher enrichment factors (EFs) for most metals than those from the Tatun Volcano Group, which revealed that the geochemistry of Nan-ao lichens is dominated by interception of suspended particles rather than absorption of lichen surface. In addition, the fact that no Eu-negative anomaly (Eu/Eu* approximate to 1.0) can be observed in the normalized patterns of rare earth elements of lichens from Nan-ao reconBrms the derivation. In contrast, lichens from the Tatun Volcano Group are characterized by lower enrichment factors of metals, evident from Ce-negative and Eu-positive anomalies (Ce/Ce* < 0.6 and Eu/Eu* > 1.0), which implies that the lichen chemistry may be principally established by the chemical adsorption of functional groups on the lichen surface. In addition, the extraordinary enrichment factors of Ca, Mg, Na, and K of lichens near the northern coast (EF > 10) prove the involvement of seawater aerosol on the atmospheric chemistry. The lead isotopic compositions reveal that unleaded gasoline could be the dominant source of lead for Nan-ao lichens (Pb-207/Pb-206 > 0.86 and Pb-208/Pb-206 < 2.105), while the local andesite provides the lead to lichens from the Tatun Volcano Group. However, the Tatun Volcano Group is very close to Taipei City, with all kinds of anthropogenic activities, which also contribute a considerable amount of lead to the atmosphere.
    關聯: J EARTH SYST SCI, v.130, n.4, pp.228
    Appears in Collections:[觀光事業管理系(含溫泉所)] 期刊論文

    Files in This Item:

    File Description SizeFormat
    s12040-021-01724-w.pdf1024KbAdobe PDF47View/Open

    All items in CNU IR are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback