1. Are acid volatile sulfides (AVS) important trace metals sinks in semi-arid mangroves?
- Author
-
Queiroz HM, Nóbrega GN, Otero XL, and Ferreira TO
- Subjects
- Acids, Biological Availability, Geologic Sediments, Iron, Metals analysis, Trace Elements analysis, Water Pollutants, Chemical, Metals, Heavy analysis, Soil chemistry, Sulfides analysis, Wetlands
- Abstract
Acid-volatile sulfides (AVS) formation and its role on trace metals bioavailability were studied in semi-arid mangroves. The semi-arid climatic conditions at the studied sites, marked by low rainfall and high evapotranspiration rates, clearly limited the AVS formation (AVS contents varied from 0.10 to 2.34μmolg
-1 ) by favoring oxic conditions (Eh>+350mV). The AVS contents were strongly correlated with reactive iron and organic carbon (r=0.84; r=0.83 respectively), evidencing their dominant role for AVS formation under semi-arid conditions. On the other hand, the recorded ΣSEM/AVS values remained >1 evidencing a little control of AVS over the bioavailability of trace metals and, thus, its minor role as a sink for toxic metals., (Copyright © 2017 Elsevier Ltd. All rights reserved.)- Published
- 2018
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