In situ degradation of monoethyl-, diethyl phthalate and o-phthalic acid in a landfil leachate plume (Grindsted, Denmark)
(English)Manuscript (preprint) (Other academic)
The distribution of a-phthalic acid and ten of its mono- and diesters in the leachate plume downgradient of an unlined landfill (Grindsted, Denmark) was mapped along an 80 m transect. A total of 27 groundwater samples were concentrated by solid-phase extraction (SPE) using a polystyrene divinylbenzene (PS-DVB) polymer. Elevated concentrations of DEP, MEP and phthalic acid were observed, with maxima of 1260, 231 and 51 µg/L, respectively. Generally, high concentrations were observed close to the landfill border and in the lower parts of the aquifer. At a distance of 50m from the landfill border, the concentrations of all the studied phthalates, including DEP, MEP and PA, had decreased to below the detection limits (1 µg/L ). The presence of the specific metabolite MEP and PA, at the landfill border and in the plume, indicates that in situ anaerobic degradation/transformation of DEP occurred both in and beneath the landfill, as well as in the leachate-contarninated soil profile. Our findings suggest that anaerobic degradation is a key process also in the aquifer at the Grindsted landfill site. Tills study emphasises that phthalates should be regarded as potential contaminants in aquifers.
diethyl phthalate, monoethyl phthalate, phthalic acid, redox, biotic degradation
Social Sciences Interdisciplinary
IdentifiersURN: urn:nbn:se:liu:diva-80183OAI: oai:DiVA.org:liu-80183DiVA: diva2:546072