High-precision analysis on annual variations of heavy metals, lead isotopes and rare earth elements in mangrove tree rings by inductively coupled plasma mass spectrometry

Yu, Ke-Fu, Kamber, Balz S., Lawrence, Michael G., Greig, Alan and Zhao, Jian-Xin (2007) High-precision analysis on annual variations of heavy metals, lead isotopes and rare earth elements in mangrove tree rings by inductively coupled plasma mass spectrometry. Nuclear Instruments & Methods In Physics Research Section B-beam Interactions With Materials And Atoms, 255 2: 399-408. doi:10.1016/j.nimb.2006.11.127


Author Yu, Ke-Fu
Kamber, Balz S.
Lawrence, Michael G.
Greig, Alan
Zhao, Jian-Xin
Title High-precision analysis on annual variations of heavy metals, lead isotopes and rare earth elements in mangrove tree rings by inductively coupled plasma mass spectrometry
Journal name Nuclear Instruments & Methods In Physics Research Section B-beam Interactions With Materials And Atoms   Check publisher's open access policy
ISSN 0168-583X
Publication date 2007-01-01
Sub-type Article (original research)
DOI 10.1016/j.nimb.2006.11.127
Volume 255
Issue 2
Start page 399
End page 408
Total pages 10
Place of publication Amsterdam
Publisher Elsevier Science Bv
Collection year 2008
Language eng
Subject C1
270704 Landscape Ecology
780104 Earth sciences
Abstract Annual variations from 1982 to 1999 of a wide range of trace elements and reconnaissance Pb isotopes (Pb-207/Pb-206 and Pb-208/Pb-206) were analyzed by solution ICP-MS on digested ash from mangrove Rhizophora apiculata, obtained from Leizhou Peninsula, along northern coast of South China Sea. The concentrations of the majority of elements show a weak, declining trend with growth from 1982 to 1999, punctuated by several high concentration spikes. The declining trends are positively correlated with ring width and negatively correlated with inferred water-use efficiency, suggesting a physiological control over metal-uptake in this species. The episodic metal concentration-peaks cannot be interpreted with lateral movement or growth activities and appear to be related to environmental pollution events. Pb isotope ratios for most samples plot along the 'Chinese Pb line' and clearly document the importance of gasoline Pb as a source of contaminant. Shale-normalised REE + Y patterns are relatively flat and consistent across the growth period, with all patterns showing a positive Cc anomaly and elevated Y/Ho ratio. The positive Ce anomaly is observed regardless of the choice of normaliser, in contrast to previously reported REE patterns for terrestrial and marine plants. This pilot study of trace element, REE + Y and Pb isotope distribution in mangrove tree rings indicates the potential use of mangroves as monitors of historical environmental change. (c) 2006 Elsevier B.V. All rights reserved.
Keyword Instruments & Instrumentation
Nuclear Science & Technology
Physics, Atomic, Molecular & Chemical
Physics, Nuclear
trace elements
Pb isotopes
rare earth elements
tree ring
mangrove
human activity
Coal-forming Plants
Soil-grown Plants
Historical Changes
Pollution History
Patterns
Pine
Cadmium
Ratios
Oak
Pb
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Tue, 19 Feb 2008, 02:48:03 EST