Imperial College London
Alternate

ProfessorDominikWeiss

Faculty of Engineering, Department of Earth Science & Engineering

Professor of Environmental Geochemistry
 
 
 
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Contact

 

+44 (0)20 7594 6383d.weiss

 
 
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Location

 

2.39Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Araújo:2016:10.1016/j.chemgeo.2016.12.004,
author = {Araújo, DF and Boaventura, GR and Machado, W and Viers, J and Weiss, D and Patchineelam, SR and Ruiz, I and Rodrigues, APC and Babinski, M and Dantas, E},
doi = {10.1016/j.chemgeo.2016.12.004},
journal = {Chemical Geology},
pages = {226--235},
title = {Tracing of anthropogenic zinc sources in coastal environments using stable isotope composition},
url = {http://dx.doi.org/10.1016/j.chemgeo.2016.12.004},
volume = {449},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The use of zinc isotopes to trace anthropogenic sources in coastal areas has been tested in this study. We determined the stable isotopic composition of zinc in sediment cores, suspended particulate matter (SPM) and rocks collected at the Sepetiba Bay (southeastern Brazil), an estuarine lagoon heavily impacted by metallurgic activities. These isotopic signatures were compared with those from willemite ore, which represent the main mineral refined by the major industrial source of zinc. The aim was to test if this tracer system enables to identify sources and sinks of anthropogenic zinc and to reconstruct the temporal and spatial evolution of zinc contamination. The zinc isotopic compositions (expressed using the δ66Zn notation relative to the JMC 3-0749-L solution) showed significant variations in the sediment cores, the SPM, and willemite ore minerals, ranging between − 0.01 and + 1.15‰. Spatial and temporal analysis of sediments samples fit well in a model of mixing involving three main end-members: i) Terrestrial background (δ66ZnJMC = + 0.28 ± 0.12‰, 2σ); ii) marine detrital material (δ66ZnJMC = + 0.45 ± 0.03‰, 2σ); and iii) a major anthropogenic source associated with electroplating wastes released into the bay (δ66ZnJMC = + 0.86 ± 0.15‰, 2σ). Sediment cores collected in the mud flats showed high correlation between δ66Zn and zinc enrichment factors, suggesting good preservation of the isotopic records of natural and anthropogenic sources. The sediment core sampled from a mangrove wetland located in a zone impacted by the metallurgy presented levels of zinc up to 4% (sediment dry weight) and preserved the isotopic signatures of electroplating wastes, despite evidences that post depositional processes slightly changed the isotopic signatures in some layers from this core toward heavier δ66ZnJMC values (above + 1.0‰). A two component mixing model su
AU  - Araújo,DF
AU  - Boaventura,GR
AU  - Machado,W
AU  - Viers,J
AU  - Weiss,D
AU  - Patchineelam,SR
AU  - Ruiz,I
AU  - Rodrigues,APC
AU  - Babinski,M
AU  - Dantas,E
DO  - 10.1016/j.chemgeo.2016.12.004
EP  - 235
PY  - 2016///
SN  - 1872-6836
SP  - 226
TI  - Tracing of anthropogenic zinc sources in coastal environments using stable isotope composition
T2  - Chemical Geology
UR  - http://dx.doi.org/10.1016/j.chemgeo.2016.12.004
UR  - http://hdl.handle.net/10044/1/43438
VL  - 449
ER  -
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