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Copper bioavailability in a coastal environment of Northern Chile: comparison of bioassay and analytical speciation approaches.

Abstract：

:An integrated approach including chemical speciation analyses and microalgal bioassays was used to assess the impact of copper from copper mining on a coastal area in Northern Chile. Dissolved copper ranged from <1 microg l(-1) at reference sites to 48 microgl(-1) at sites close to the mine discharge. Dissolved copper at sites closest to the discharge always exceeded seawater complexing capacities determined by anodic stripping voltammetry (ASV), and consequently labile copper was always detected (1-37 microg l(-1)). Agreement between ASV-labile copper and copper retained by cation exchange (ALSA) columns was excellent. Measured labile copper also accurately predicted bioavailable copper determined by growth inhibition of Nitzschia closterium and enzyme inhibition in Dunaliella tertiolecta. Seawater from Caleta La Lancha had the highest dissolved and labile copper and was the most toxic to micro-algal growth and enzyme activity. Previous studies at this site confirmed it had the lowest level of biodiversity, suggesting that copper may have both direct and indirect effects on these communities.

journal_name

Mar Pollut Bull

journal_title

Marine pollution bulletin

authors

Stauber JL,Andrade S,Ramirez M,Adams M,Correa JA

doi

10.1016/j.marpolbul.2005.05.008

subject

Has Abstract

pub_date

2005-11-01 00:00:00

pages

1363-72

issue

11

eissn

0025-326X

issn

1879-3363

pii

S0025-326X(05)00210-9

journal_volume

50

pub_type

杂志文章

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