Historical gold mining increased metal(loid) concentrations in lake sediments from Nova Scotia, Canada
Abstract
Introduction
Methods and materials
Study region and lakes
Lake | Gegogan | Thomas | Muddy | Charles | Loon |
---|---|---|---|---|---|
Latitude (decimal degrees) | 45.0783 | 44.792 | 44.788 | 44.715 | 44.703 |
Longitude (decimal degrees) | −62.0045 | −63.607 | −63.611 | −63.548 | −63.507 |
Maximum depth (m) | 2.2 | 17 | 3.5 | 28.1 | 6.6 |
Surface area (km2) | 0.21 | 1.12 | 0.1 | 1.35 | 0.75 |
Sampling date | April 2022 | November 2021 | November 2021 | May 2019 | May 2019 |
Sediment coring depth (m) | 2.0 | 16.7 | 3.3 | 28.1 | 6.6 |
Field work
Radiometric dating
Metal(loid) analysis
Data analysis
Results
Radiometric dating
Trends in sedimentary metal(loid) concentrations
CCME Interim Sediment Quality Guidelines (ISQGs)
Sedimentary arsenic and mercury enrichment factors
Probable effects concentration quotients (PEC-Q)
Discussion
Sedimentary As and Hg contamination due to historical gold mining and mineral processing
Sediment quality guidelines and paleotoxicity in mine-impacted lakes
Implications for ecosystem recovery and aquatic biota
Acknowledgements
References
Supplementary material
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