Heavy metal contamination in coastal sediments and soils near the Brazilian Antarctic Station, King George Island
Entry ID: ECA053

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Summary
Abstract: The natural and anthropogenic processes controlling sediment chemistry in Admiralty Bay, King George Island, Antarctica was investigate, calling the attention on the area affected by the Brazilian Antarctic Station Comandante Ferraz (Ferraz). Total and bioavailable concentrations of sixteen elements were determined in 32 sediment and 14 soils samples. Factor analysis allowed us to distinguish three groups of samples: (1) Ferraz sediments, with higher content of total trace metals and organic matter; (2) control sediments, with intermediate characteristics; (3) Ferraz soils, with higher bioavailability of most metals due to its oxidizing condition and low organic matter content. Major elements such as Fe, Al, Ca and Ti presented similar levels in all three groups. Enrichment factor calculations showed that paints, sewage and petroleum contamination enhanced metal concentrations in Ferraz surface sediments as follows: B, Mo, and Pb (>90%); V and Zn (70–80%); Ni, Cu, Mg, and Mn (30–40%). Despite evidence of contamination in these sediments, the low bioavailability, probably caused by iron-sulfide, indicates small environmental risks.

Temporal Coverage
Start Date: 2002-12-21
Stop Date: 2003-03-20


Location Keywords
OCEAN > SOUTHERN OCEAN > SOUTH SHETLAND ISLANDS
GEOGRAPHIC REGION > POLAR
CONTINENT > ANTARCTICA


Science Keywords
LAND SURFACE >EROSION/SEDIMENTATION >SEDIMENT CHEMISTRY    [Definition]


ISO Topic Category
ENVIRONMENT


Platform
FIXED OBSERVATION STATIONS    [Information]


Instrument
ICP-ES >INDUCTIVELY COUPLED PLASMA EMISSION SPECTROSCOPY


Keywords
trace metals
St.George Island


Data Set Progress
COMPLETE


Data Center
Universidade Federal Fluminense    [Information]
Data Center URL: http://www.uff.br

Data Center Personnel
Name: EMMANOEL SILVA-FILHO
Phone: +55 2127174189
Email: geoemma at vm.uff.br
City: Nitero´i
Province or State: RJ
Postal Code: 24020-007
Country: Brazil



Creation and Review Dates
DIF Creation Date: 2012-07-05
Last DIF Revision Date: 2012-07-30

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