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Heavy metal contamination in coastal sediments and soils near the Brazilian Antarctic Station, King George Island.

Abstract：

:This paper investigates the natural and anthropogenic processes controlling sediment chemistry in Admiralty Bay, King George Island, Antarctica, emphasizing 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.

journal_name

Mar Pollut Bull

journal_title

Marine pollution bulletin

authors

Santos IR,Silva-Filho EV,Schaefer CE,Albuquerque-Filho MR,Campos LS

doi

10.1016/j.marpolbul.2004.10.009

subject

Has Abstract

pub_date

2005-02-01 00:00:00

pages

185-94

issue

2

eissn

0025-326X

issn

1879-3363

pii

S0025-326X(04)00343-1

journal_volume

50

pub_type

杂志文章

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