Influence of phosphonic acids and EDTA on bacterial copper toxicity
| Autor: | Philippe M. Chazal, VÉronique Deluchat, Eric D. van Hullebusch |
|---|---|
| Přispěvatelé: | Deluchat, Véronique, Groupement de Recherche Eau, Sol, Environnement (GRESE), Université de Limoges (UNILIM), Laboratoire Géomatériaux et Environnement (LGE), Université Paris-Est Marne-la-Vallée (UPEM) |
| Jazyk: | angličtina |
| Rok vydání: | 2001 |
| Předmět: |
Aminotris(methylene)phosphonic acid (ATMP)
Health Toxicology and Mutagenesis Inorganic chemistry Microtox 0207 environmental engineering chemistry.chemical_element 02 engineering and technology 010501 environmental sciences medicine.disease_cause 01 natural sciences chemistry.chemical_compound Copper toxicity 1' disphosphonic acid (HEDP) medicine Environmental Chemistry Methylene 020701 environmental engineering Escherichia coli 0105 earth and related environmental sciences Ligand [SDE.IE]Environmental Sciences/Environmental Engineering Escherechia coli EDTA medicine.disease Pollution Copper chemistry Hydroxyethane-1 [SDE.IE] Environmental Sciences/Environmental Engineering ATMP |
| Zdroj: | Toxicological and Environmental Chemistry Toxicological and Environmental Chemistry, Taylor & Francis, 2001, 82, pp.75-91 |
| ISSN: | 0277-2248 |
| Popis: | International audience; The influence of hydroxyethane-1,1′diphosphonic acid (HEDP) and aminotris(methylene) phosphonic acid (ATMP) on bacterial copper toxicity and comparisons with EDTA was studied. Two tests were used throughout the study, the normalised Microtox test and an assay (I24) based on Escherichia coli inhibition. The concentration range studied was mainly near the ones that are nowadays detected in the environment: 10-8-10-6M. A chemical approach was also performed in order to determine the speciation of the inhibitory copper forms in the working conditions used. Ligands lower copper toxicity after 10-6M, but protection by HEDP was lower than that of both EDTA and ATMP. For [ligand]/[copper] ratios close to 0.5 (with [ligand] > 10-6M), copper resistance increased in both tests in the presence of EDTA and ATMP but not in the presence of HEDP. For [ligand]/[copper] ratios close to 0.1 (with [ligand] = 10-7M) the presence of ATMP and EDTA seems to increase E. coli sensitivity to free copper. |
| Databáze: | OpenAIRE |
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