Geochemical partitioning of lead in biogenic carbonate sediments in a coral reef depositional environment
| Autor: | Guillermo Horta-Puga |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Geologic Sediments
010504 meteorology & atmospheric sciences Range (biology) Geochemistry Carbonates 010501 environmental sciences Aquatic Science Oceanography 01 natural sciences Sedimentary depositional environment chemistry.chemical_compound Organic matter Reef Mexico 0105 earth and related environmental sciences chemistry.chemical_classification geography geography.geographical_feature_category Terrigenous sediment Discharge Coral Reefs Coral reef Pollution chemistry Lead Carbonate Geology Environmental Monitoring |
| Zdroj: | Marine pollution bulletin. 116(1-2) |
| ISSN: | 1879-3363 |
| Popis: | The fate of trace elements in reef depositional environments has not been extensively investigated. The aim of this study was to determine the partitioning of Pb in sediments of the Veracruz Reef System, and its relation to local environmental sources. Lead was determined in four geochemical fractions: exchangeable (3.8 ± 0.4 μg g− 1), carbonate (57.0 ± 13.6 μg g− 1), organic matter (2.0 ± 0.9 μg g− 1), and mineral (17.5 ± 5.4 μg g− 1). For the mineral fraction, lead concentrations were higher in those reefs influenced by river discharge or by long-distance transport of terrigenous sediments. The bioavailable concentration of lead (range: 21.9–85.6 μg g− 1) indicates that the Veracruz Reef System is a moderately polluted area. As expected, the carbonate fraction contained the highest proportion of Pb (70%), and because the reef framework is largely made up of by biogenic carbonate sediments, hence, it is therefore the most important repository of Pb in coral reef depositional environments. |
| Databáze: | OpenAIRE |
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