Soil microbial biomass carbon and fatty acid composition of earthworm Lumbricus rubellus after exposure to engineered nanoparticles

Vito Armando Laudicina, Luigi Badalucco, Serena Carbone, Antonietta Gatti, Gilmo Vianello, Livia Vittori Antisari

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15 Citazioni (Scopus)

Abstract

The aim of this work was to investigate the effect ofengineered nanoparticles (NPs) on soil microbial biomass C(MBC) and on earthworm Lumbricus rubellus. An artificialsoil was incubated for 4 weeks with earthworms fed withvegetable residues contaminated by NPs, consisting of Ag,Co, Ni and TiO2. After the treatments, soils were analysed for MBC and total and water soluble metal-NPs, whereasearthworms were purged for 28 days and then analysedfor fatty acids (FAs) and total metal-NPs. Longitudinalsections of earthworms were investigated by environmentalscanning electron microscopy (ESEM), equipped withenergy-dispersive X-ray spectroscopy (EDS), to provideinsights about the retention and localization of NPs withinearthworms. The nanoparticles reduced the MBC content inthe following order Ag>Co>Ni, whereas TiO2 did not affectit. The ESEM-EDS analysis confirmed NP retention in earthwormguts and tissues. The solid/water coefficient of partitionsuggested that NPs interfered with living organisms due totheir presence in suspension. Among the 27 FAs identified inearthworm tissues, the eicosapentaenoic acid (20:5ω3) wasthe most abundant. The degree of unsaturation of FAs wasreduced by supplying NP-contaminated food.
Lingua originaleEnglish
pagine (da-a)261-269
Numero di pagine9
RivistaBiology and Fertility of Soils
Volume50
Stato di pubblicazionePublished - 2014

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All Science Journal Classification (ASJC) codes

  • Microbiology
  • Agronomy and Crop Science
  • Soil Science

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