A comparison of atmospheric geochemistry through lichens from volcanic and non-volcanic areas, north Taiwan

doi:10.1007/s12040-021-01724-w

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Title:	A comparison of atmospheric geochemistry through lichens from volcanic and non-volcanic areas, north Taiwan
Authors:	Lin, Le-Qi Lu, Hsueh-Yu Pi, Ju-Lien Liou, Tai-Sheng Chen, Wen-Fu Hsieh, Pei-Shan
Contributors:	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
Keywords:	Northern Taiwan lichens as bioindicators rare earth elements lead isotopes
Date:	2021
Issue Date:	2023-11-11 11:43:08 (UTC+8)
Publisher:	INDIAN ACAD SCIENCES
Abstract:	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.
Relation:	J EARTH SYST SCI, v.130, n.4, pp.228
Appears in Collections:	[Dept. of Tourism Management] Periodical Articles

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