An unsteady-state fugacity model has been developed and validated as a predictive tool that will be useful in the planning phase of aquatic ecotoxicological tests. The model predicts the compound concentration trends in water and biota in experimental aquaria, with respect to the chemical and experimental conditions. The model has been validated with two echinoderm species, Paracentrotus lividus and Antedon mediterranea after a 28-days exposure to p,p'-DDE or triphenyltin chloride (TPT-CI), respectively. Differences between the predicted vs. measured concentrations of these compounds in water and biota were generally below a factor of two for both compounds. The model here proposed considers three different compartments, water, animals, and glass, and five loss processes: volatilisation, glass adsorption, abiotic degradation, bioconcentration and biotransformation. In particular, adsorption onto glass materials was introduced into the model by means of two equations (R-2 values of 0.86 and 0.90) relating the adsorption rate constant and glass-water partition coefficient on the base of the physical-chemical properties of the compound (log K-ow). The model can be applied during the planning phase of ecotoxicological tests and for understanding the behaviour of the compound at this micro-ecosystem scale after the tests have been performed.

A dynamic model for predicting chemical concentrations in water and biota during the planning phase of aquatic ecotoxicological tests / P. Tremolada, M. Sugni, G. Gilioli, A. Barbaglio, F. Bonasoro, M.D. Candia Carnevali. - In: CHEMOSPHERE. - ISSN 0045-6535. - 75:7(2009), pp. 915-923.

A dynamic model for predicting chemical concentrations in water and biota during the planning phase of aquatic ecotoxicological tests

P. Tremolada
Primo
;
M. Sugni
Secondo
;
A. Barbaglio;F. Bonasoro
Penultimo
;
M.D. Candia Carnevali
Ultimo
2009

Abstract

An unsteady-state fugacity model has been developed and validated as a predictive tool that will be useful in the planning phase of aquatic ecotoxicological tests. The model predicts the compound concentration trends in water and biota in experimental aquaria, with respect to the chemical and experimental conditions. The model has been validated with two echinoderm species, Paracentrotus lividus and Antedon mediterranea after a 28-days exposure to p,p'-DDE or triphenyltin chloride (TPT-CI), respectively. Differences between the predicted vs. measured concentrations of these compounds in water and biota were generally below a factor of two for both compounds. The model here proposed considers three different compartments, water, animals, and glass, and five loss processes: volatilisation, glass adsorption, abiotic degradation, bioconcentration and biotransformation. In particular, adsorption onto glass materials was introduced into the model by means of two equations (R-2 values of 0.86 and 0.90) relating the adsorption rate constant and glass-water partition coefficient on the base of the physical-chemical properties of the compound (log K-ow). The model can be applied during the planning phase of ecotoxicological tests and for understanding the behaviour of the compound at this micro-ecosystem scale after the tests have been performed.
Ecotoxicological aquatic tests; Loss processes; Modelling; p,p′-DDE; Triphenyltin chloride
Settore BIO/05 - Zoologia
Settore BIO/07 - Ecologia
Article (author)
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/61632
Citazioni
  • ???jsp.display-item.citation.pmc??? 0
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 4
social impact