Modelling the fate of PAH added with composts in amended soil according to the origin of the exogenous organic matter

The Science of the Total Environment
Khaled BrimoP Garnier

Abstract

A new model that was able to simulate the behaviours of polycyclic aromatic hydrocarbons (PAH) during composting and after the addition of the composts to agricultural soil is presented here. This model associates modules that describe the physical, biological and biochemical processes involved in PAH dynamics in soils, along with a module describing the compost degradation resulting in PAH release. The model was calibrated from laboratory incubations using three14C-PAHs, phenanthrene, fluoranthene and benzo(a)pyrene, and three different composts consisting of two mature and one non-mature composts. First, the labelled PAHs were added to the compost over 28days, and spiked composts were then added to the soil over 55days. The model calculates the proportion of biogenic and physically bound residues in the non-extractable compartment of PAHs at the end of the compost incubation to feed the initial conditions of the model for soil amended with composts. For most of the treatments, a single parameter set enabled to simulate the observed dynamics of PAHs adequately for all the amended soil treatments using a Bayesian approach. However, for fluoranthene, different parameters that were able to simulate the growth of a specific microb...Continue Reading

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Jan 31, 2013·The Science of the Total Environment·Karolina M NowakMatthias Kästner
Apr 3, 2013·Chemosphere·Claire-Sophie HaudinSabine Houot
May 16, 2013·Journal of Environmental Quality·G LashermesP Garnier

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