| Title | Environmental compatibility of soils debris conditioned with foaming agents containing sodium lauryl ether sulphate in a tunnelling scenario |
| Abstract | A wide use of foaming agents as lubricants is required in mechanized tunneling. Their main component, the anionic surfactant sodium lauryl ether sulphate (SLES), can remain in residual concentrations in soil debris, influencing their potential reuse as by-product. This study aimed at evaluating the environmental fate and e
ects of a foaming product used for conditioning soils collected from real excavation sites, in the presence/absence of an anti-clogging polymer, both containing SLES. Soil microcosm experiments were set-up and incubated for 28 days. Over time, soils and their water extracts (elutriates) were collected to perform both ecotoxicological tests (Vibrio fischeri, Lepidium sativum, Eisenia foetida, Hetereocypris incongruens, Danio rerio) and SLES analysis. The results showed that, just after conditioning, SLES did not exert any hazardous e
ect on the organisms tested except for the bacterium V. fischeri, which was the most sensitive to its presence. However, from day seven the toxic e
ect on the bacterium was never observed thanks to the SLES decrease in the elutriates (<2 mg/L). SLES degraded in soils (half-lives from 9 to 25 days) with higher disappearance rates corresponding to higher values of microbial abundances. This study highlights the importance of site-specific studies for assessing the environmental reuse of spoil materials. |
| Source | Water (Basel) 12 (8) |
| Keywords | TBM-EPB excavationSLESspoil materialecotoxicity |
| Journal | Water (Basel) |
| Editor | Molecular Diversity Preservation International, Basel, |
| Year | 2020 |
| Type | Articolo in rivista |
| DOI | 10.3390/w12082074 |
| Authors | Patrolecco L., Pescatore T, Grenni P, Mariani L, Rolando L, Finizio A, Spataro F, Rauseo J, Ademollo N, Muzzini VG, Lacchetti I, Barra Caracciolo A |
| Text | 437598 2020 10.3390/w12082074 TBM EPB excavation SLES spoil material ecotoxicity Environmental compatibility of soils debris conditioned with foaming agents containing sodium lauryl ether sulphate in a tunnelling scenario Patrolecco L., Pescatore T, Grenni P, Mariani L, Rolando L, Finizio A, Spataro F, Rauseo J, Ademollo N, Muzzini VG, Lacchetti I, Barra Caracciolo A Patrolecco L., Spataro F, Rauseo J, Ademollo N ISP CNR Pescatore T, Grenni P, Mariani L, Rolando L, Barra Caracciolo A IRSA CNR Finizio A Universita Milano Bicocca Muzzini VG IRET CNR Lacchetti I ISS A wide use of foaming agents as lubricants is required in mechanized tunneling. Their main component, the anionic surfactant sodium lauryl ether sulphate SLES , can remain in residual concentrations in soil debris, influencing their potential reuse as by product. This study aimed at evaluating the environmental fate and e ects of a foaming product used for conditioning soils collected from real excavation sites, in the presence/absence of an anti clogging polymer, both containing SLES. Soil microcosm experiments were set up and incubated for 28 days. Over time, soils and their water extracts elutriates were collected to perform both ecotoxicological tests Vibrio fischeri, Lepidium sativum, Eisenia foetida, Hetereocypris incongruens, Danio rerio and SLES analysis. The results showed that, just after conditioning, SLES did not exert any hazardous e ect on the organisms tested except for the bacterium V. fischeri, which was the most sensitive to its presence. However, from day seven the toxic e ect on the bacterium was never observed thanks to the SLES decrease in the elutriates <2 mg/L . SLES degraded in soils half lives from 9 to 25 days with higher disappearance rates corresponding to higher values of microbial abundances. This study highlights the importance of site specific studies for assessing the environmental reuse of spoil materials. ; ; ; 12 Published version Articolo in rivista Molecular Diversity Preservation International 2073 4441 Water Basel Water Basel Water Basel Water. Basel MARIANI LIVIA ROLANDO LUDOVICA tanitapescatore PESCATORE TANITA luisa.patrolecco PATROLECCO LUISA anna.barracaracciolo BARRA CARACCIOLO ANNA paola.grenni GRENNI PAOLA nicoletta.ademollo ADEMOLLO NICOLETTA francesca.spataro SPATARO FRANCESCA jasmin.rauseo RAUSEO JASMIN |
