Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Toxic response of the bacterium Vibrio fischeri to sodium lauryl ether sulphate residues in excavated soils |
| Abstract | Sodium lauryl ether sulphate (SLES) is the main chemical component in several lubricant products used for soil conditioning in the mechanized excavation industry using Earth Pressure Balance-Tunnel Boring Machines. During the tunnelling process, huge amounts of excavated soil are produced and the SLES presence can affect the subsequent re-use of this material as a by-product. Currently, there is still no regulatory indication of reliable and sensitive bioassays for monitoring soil quality during the excavation process. The main objective of this work was to verify if the Vibrio fischeri screening test was suitable as a consistent and precautionary tool for this specific purpose. Firstly, the ecotoxicity (EC20 and EC50) of the SLES standard solution and three commercial products (SLES content from 10 to 50%) were evaluated to select the most environmental friendly product. Subsequently, soil samples from about 2 years of tunnelling in a real construction site, conditioned with the selected product, were evaluated for their environmental compatibility with the prescriptions of an Italian site-specific protocol. The latter established 2 mg/L as a threshold value for SLES concentration in soil water extracts and a no toxic response (<=20%) for the Vibrio fischeri test. The comparison of the bacterium bioluminescence inhibition values (%) with analytical determinations showed an ecotoxicity when SLES was >2 mg/L. The toxicity was directly related to SLES concentration, indicating that the V. fischeri test and the SLES analyses are suitable tools for assessing excavated soil as a by-product, ensuring its safe reuse in accordance with a green production process (circular economy). |
| Source | Ecotoxicology (Dordrecht. Online) |
| Keywords | Anionic surfactantTBM-EPB tunnellingSoil re-use managementSite specific protocolEnvironmental compatibilityCircular economy |
| Journal | Ecotoxicology (Dordrecht. Online) |
| Editor | Kluwer, Dordrecht, Paesi Bassi |
| Year | 2020 |
| Type | Articolo in rivista |
| DOI | 10.1007/s10646-020-02202-7 |
| Authors | L. Mariani, P. Grenni, Anna Barra Caracciolo, E. Donati, J. Rauseo, L. Rolando, L. Patrolecco |
| Text | 420309 2020 10.1007/s10646 020 02202 7 Anionic surfactant TBM EPB tunnelling Soil re use management Site specific protocol Environmental compatibility Circular economy Toxic response of the bacterium Vibrio fischeri to sodium lauryl ether sulphate residues in excavated soils L. Mariani, P. Grenni, Anna Barra Caracciolo, E. Donati, J. Rauseo, L. Rolando, L. Patrolecco Istitituto di Ricerca Sulle Acque IRSA CNR , Istituto Scienze Polari ISP CNR , Istituto dei Sistemi Biologici ISB CNR Sodium lauryl ether sulphate SLES is the main chemical component in several lubricant products used for soil conditioning in the mechanized excavation industry using Earth Pressure Balance Tunnel Boring Machines. During the tunnelling process, huge amounts of excavated soil are produced and the SLES presence can affect the subsequent re use of this material as a by product. Currently, there is still no regulatory indication of reliable and sensitive bioassays for monitoring soil quality during the excavation process. The main objective of this work was to verify if the Vibrio fischeri screening test was suitable as a consistent and precautionary tool for this specific purpose. Firstly, the ecotoxicity EC20 and EC50 of the SLES standard solution and three commercial products SLES content from 10 to 50% were evaluated to select the most environmental friendly product. Subsequently, soil samples from about 2 years of tunnelling in a real construction site, conditioned with the selected product, were evaluated for their environmental compatibility with the prescriptions of an Italian site specific protocol. The latter established 2 mg/L as a threshold value for SLES concentration in soil water extracts and a no toxic response <=20% for the Vibrio fischeri test. The comparison of the bacterium bioluminescence inhibition values % with analytical determinations showed an ecotoxicity when SLES was >2 mg/L. The toxicity was directly related to SLES concentration, indicating that the V. fischeri test and the SLES analyses are suitable tools for assessing excavated soil as a by product, ensuring its safe reuse in accordance with a green production process circular economy . Published version 21/03/2020 Toxic response of the bacterium Vibrio fischeri to sodium lauryl ether sulphate residues in excavated soils On Line First EcotoxicologySLESvsVibrio.pdf Articolo in rivista Kluwer 1573 3017 Ecotoxicology Dordrecht. Online Ecotoxicology Dordrecht. Online Ecotoxicology. Dordrecht. Online MARIANI LIVIA ROLANDO LUDOVICA luisa.patrolecco PATROLECCO LUISA anna.barracaracciolo BARRA CARACCIOLO ANNA paola.grenni GRENNI PAOLA enrica.donati DONATI ENRICA jasmin.rauseo RAUSEO JASMIN |