Accounting of media conditions in the Life Cycle Impact Assessment of Metals on Aquatic Ecosystems

Morten Birkved, Jerome Payet

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    Impact from metals play a major role in all Life Cycle Impact Assessment (LCIA) studies. Nevertheless, LCIA methods are typically not adapted for such compounds ignoring problems of speciation and bioavailability. Current uncertainty on metal toxicity estimates are on average twice as high as for other chemical compounds (Figure1). Perspectives for the reduction of uncertainty on metals toxicity are presented below. Focusing on the example of chromium (VI), the main factors influencing the toxic response from Daphnia (hardness and pH) are identified. Analysis is based on ecotoxicological data (US. EPA, 2002). 80 Acute Daphnia magna EC50 on 4 different chromium compounds, all with the same oxidation state (VI), were retrieved: chromic acid diNa salt (N=14), potassium dichromate (N=40), potassium chromate (N=14) and sodium chromate (N=12). Two statistical methods are used for the assessment of the influence of media condition on the toxicity : Partial Least Square projection to latent Structure Regression (PLSR) was carried out to estimate the relative variable importance and linear regression was used to, identify the relation between media parameters the response of Daphnia magna.
    Original languageEnglish
    Title of host publicationSETAC Europe 13th Annual Meeting Hamburg, Germany, 27 April - 1 May 2003: Abstracts
    EditorsSETAC Europe
    Place of PublicationBrussels
    PublisherSETAC Europe
    Publication date2003
    Publication statusPublished - 2003
    EventSETAC Europe 13th annual meeting : Understanding the complexity of environmental issues. A way to sustainability - Hamburg, Germany, 27 april - 1 may
    Duration: 1 Jan 2003 → …
    Conference number: 13

    Conference

    ConferenceSETAC Europe 13th annual meeting : Understanding the complexity of environmental issues. A way to sustainability
    Number13
    CityHamburg, Germany, 27 april - 1 may
    Period01/01/2003 → …

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