| Abstract | There is a growing concern about the simultaneous presence in the environment of different kinds of pollutants, because of the possible synergic or additive effects of chemical mixtures on ecosystems. Chlorpyrifos (CPF) is an organophosphate insecticide extensively used in agricultural practices. The anionic surfactant sodium lauryl ether sulphate (SLES) is the main component of several commercial products, including foaming agents used in underground mechanised excavation. Both compounds are produced and sold in high amounts worldwide and can be found in the environment as soil contaminants. The persistence of SLES and CPF in agricultural soils and their possible effects on the natural microbial community was evaluated in microcosms. The experimental set consisted of soil samples containing the autochthonous microbial community and treated with only SLES (70 mg/kg), only CPF (2 mg/kg) or with a mix of both compounds. Control microcosms (without the contaminants) were also performed. Soil samples were collected over the experimental period (0, 7, 14, 21 and 28 days) and analysed for CPF, SLES and the main metabolite of CPF (3, 5, 6-trichloropyridinol, TCP). The half-life time (DT) of each parent compound was estimated in all experimental conditions. At the same time, the abundance, activity and structure of the microbial community were also evaluated. The results showed that the co-presence of SLES and CPF did not substantially affect their persistence in soil (DT of 11 and 9 days with co-presence and 13 and 10 days, respectively, when alone); however, in the presence of SLES, a higher amount of the metabolite TCP was found. Interestingly, some differences were found in the bacterial community structure, abundance and activity among the various conditions. |
| Text | 425738 2020 10.1007/s11356 020 08840 y Scopus 2 s2.0 85084078243 CUPs . SLES . Soil . Persistence . Multiple contamination . 3 6 Trichloropyridinol . Foaming agents Co presence of the anionic surfactant sodium lauryl ether sulphate and the pesticide chlorpyrifos and effects on a natural soil microbial community Pescatore T.; Patrolecco L.; Rolando L.; Spataro F.; Rauseo J.; Grenni P.; Ademollo N.; Barra Caracciolo A. Water Research Institute National Research Council IRSA CNR , Rome, Water Research Institute National Research Council IRSA CNR , Rome, Italy, , , Italy; Water Research Institute National Research Council IRSA CNR , Rome, Water Research Institute National Research Council IRSA CNR , Rome, Italy, , , Italy; Department of Ecological and Biological Science DEB , Tuscia University, Viterbo, Department of Ecological and Biological Science DEB , Tuscia University, Viterbo, Italy, , Italy; Institute of Polar Sciences National Research Council ISP CNR , Rome, Institute of Polar Sciences National Research Council ISP CNR , Rome, Italy, , Italy There is a growing concern about the simultaneous presence in the environment of different kinds of pollutants, because of the possible synergic or additive effects of chemical mixtures on ecosystems. Chlorpyrifos CPF is an organophosphate insecticide extensively used in agricultural practices. The anionic surfactant sodium lauryl ether sulphate SLES is the main component of several commercial products, including foaming agents used in underground mechanised excavation. Both compounds are produced and sold in high amounts worldwide and can be found in the environment as soil contaminants. The persistence of SLES and CPF in agricultural soils and their possible effects on the natural microbial community was evaluated in microcosms. The experimental set consisted of soil samples containing the autochthonous microbial community and treated with only SLES 70 mg/kg , only CPF 2 mg/kg or with a mix of both compounds. Control microcosms without the contaminants were also performed. Soil samples were collected over the experimental period 0, 7, 14, 21 and 28 days and analysed for CPF, SLES and the main metabolite of CPF 3, 5, 6 trichloropyridinol, TCP . The half life time DT of each parent compound was estimated in all experimental conditions. At the same time, the abundance, activity and structure of the microbial community were also evaluated. The results showed that the co presence of SLES and CPF did not substantially affect their persistence in soil DT of 11 and 9 days with co presence and 13 and 10 days, respectively, when alone ; however, in the presence of SLES, a higher amount of the metabolite TCP was found. Interestingly, some differences were found in the bacterial community structure, abundance and activity among the various conditions. There is a growing concern about the simultaneous presence in the environment of different kinds of pollutants, because of the possible synergic or additive effects of chemical mixtures on ecosystems. Chlorpyrifos CPF is an organophosphate insecticide extensively used in agricultural practices. The anionic surfactant sodium lauryl ether sulphate SLES is the main component of several commercial products, including foaming agents used in underground mechanised excavation. Both compounds are produced and sold in high amounts worldwide and can be found in the environment as soil contaminants. The persistence of SLES and CPF in agricultural soils and their possible effects on the natural microbial community was evaluated in microcosms. The experimental set consisted of soil samples containing the autochthonous microbial community and treated with only SLES 70 mg/kg , only CPF 2 mg/kg or with a mix of both compounds. Control microcosms without the contaminants were also performed. Soil samples were collected over the experimental period 0, 7, 14, 21 and 28 days and analysed for CPF, SLES and themainmetabolite of CPF 3, 5, 6 trichloropyridinol, TCP . The half life time DT50 of each parent compoundwas estimated in all experimental conditions. At the same time, the abundance, activity and structure of the microbial community were also evaluated. The results showed that the co presence of SLES and CPF did not substantially affect their persistence in soil DT50 of 11 and 9 days with co presence and 13 and 10 days, respectively, when alone ; however, in the presence of SLES, a higher amount of the metabolite TCP was found. Interestingly, some differences were found in the bacterial community structure, abundance and activity among the various conditions. Published version http //www.scopus.com/record/display.url eid=2 s2.0 85084078243 origin=inward 13/04/2020 pubblicazione_ESPR Pubblicazione on line ESPR_Clorphyrifos.pdf Articolo in rivista Springer 0944 1344 Environmental science and pollution research international Environmental science and pollution research international Environ. sci. pollut. res. int. Environmental science and pollution research international. Environmental science and pollution research international Print Environmental science and pollution research Print ESPR Print 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 |
