Journal article
Impact of soil amendments and the plant rhizosphere on PAH behaviour in soil
Department of Chemistry, Technical University of Denmark1
CERE – Center for Energy Ressources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark2
Universität des Saarlandes3
Department of Environmental Engineering, Technical University of Denmark4
Environmental Chemistry, Department of Environmental Engineering, Technical University of Denmark5
Aarhus University6
Carbonaceous amendments reduce PAH dissolved concentrations (Cfree), limiting their uptake and toxicity. A soil contaminated with PAHs was mixed with activated carbon (AC), charcoal or compost and planted with radish (Raphanus sativus L.), and Cfree, chemical activities and diffusive uptake of the PAHs measured over 2 months.
For AC, Cfree and diffusive uptake were decreased by up to 94% compared to the unamended soil within one week. In addition, the sum chemical activity of the PAHs remained below the threshold for baseline toxicity. In contrast, charcoal and compost only led to modest reductions in Cfree and diffusive uptake, with sum chemical activities that could potentially result in baseline toxicity being observed.
Furthermore, both Cfree and diffusive uptake were lower in the planted compared to unplanted soils. Therefore, only AC successfully reduced PAH acute toxicity in the soil, but plant-promoted microbial degradation may also play an important role in PAH attenuation.
Language: | English |
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Year: | 2014 |
Pages: | 124-131 |
ISSN: | 02697491 and 18736424 |
Types: | Journal article |
DOI: | 10.1016/j.envpol.2014.02.008 |
ORCIDs: | 0000-0003-2874-0644 and Mayer, Philipp |