Assessing the environmental availability of sulfamethoxazole and its acetylated metabolite in agricultural soils amended with compost and manure: an experimental and modeling study

Anais Goulas (1) , Nicolas Sertillanges (2) , Patricia Garnier (1) , Valerie Dumeny (1) , Valerie Bergheaud (1) , Pierre Benoit (1) , Claire-Sophie Haudin (1)

1 ECOSYS - Ecologie fonctionnelle et écotoxicologie des agroécosystèmes
2 LBE - Laboratoire de Biotechnologie de l'Environnement [Narbonne]

The recycling of sludge compost and farmyard manure in agriculture can lead to the introduction of sulfonamide antibiotics and their acetylated metabolites into soils. The quality and the biodegradability of the exogenous organic matter (EOM) containing antibiotic residues is determinant for their environmental availability and fate in soils (Goulas et al., 2016). This study combined experimental and modeling approaches in order to: 1) assess the fraction of sulfamethoxazole (SMX) and N-acetyl-sulfamethoxazole (AcSMX) available in EOM-amended soils by using soft extractions (CaCl2, EDTA or cyclodextrin solutions) during a 28-day incubation; and 2) better understand the dynamics of sulfonamide residues in amended soils in connection with their availability and the mineralization of EOM organic matter thanks to the COP-Soil model (Geng et al. 2015). This model proposes several options to couple the biotransformation of organic pollutants (OP) with the decomposition of EOM in soil. The microbial degradation can be simulated by co-metabolism and specific-metabolism. The model also accounts for the formation of non-extractable residues (NER) via both physicochemical and microbial routes

Domaines: Sciences du Vivant [q-bio]

Anais Goulas, Nicolas Sertillanges, Patricia Garnier, Valerie Dumeny, Valerie Bergheaud, et al.. Assessing the environmental availability of sulfamethoxazole and its acetylated metabolite in agricultural soils amended with compost and manure: an experimental and modeling study. EGU 2017, European Geophysical Union General Assembly 2017, Apr 2017, Vienne, Austria. pp.EGU2017-6782-1. ⟨hal-01535208⟩