Change search
ReferencesLink to record
Permanent link

Direct link
Low accessibility and chemical activity of PAHs restrict bioremediation and risk of exposure in a manufactured gas plant soil
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
Show others and affiliations
2010 (English)In: Environmental Pollution, ISSN 0269-7491, E-ISSN 1873-6424, Vol. 158, no 5, 1214-1220 p.Article in journal (Refereed) Published
Abstract [en]

Composting of manufactured gas plant soil by a commercial enterprise had removed most of its polycyclic aromatic hydrocarbons (PAHs), but concentrations remained above regulatory threshold levels. Several amendments and treatments were first tested to restart the PAH degradation, albeit with little success. The working hypothesis was then that PAHs were ""stuck"" due to strong sorption to black carbon. Accessibility was measured with cyclodextrin extractions and on average only 4% of the PAHs were accessible. Chemical activity of the PAHs was measured by equilibrium sampling, which confirmed a low exposure level. These results are consistent with strong sorption to black carbon (BC), which constituted 59% of the total organic carbon. Composting failed to remove the PAHs, but it succeeded to minimize PAH accessibility and chemical activity. This adds to accumulating evidence that current regulatory thresholds based on bulk concentrations are questionable and alternative approaches probing actual risk should be considered.

Place, publisher, year, edition, pages
2010. Vol. 158, no 5, 1214-1220 p.
Keyword [en]
Soot, Biodegradation, Hydrophobic organic pollutants, Freely dissolved concentrations, Persistence
National Category
Natural Sciences
URN: urn:nbn:se:su:diva-52204DOI: 10.1016/j.envpol.2010.01.031ISI: 000277726500013OAI: diva2:387491
authorCount :6Available from: 2011-01-14 Created: 2011-01-13 Last updated: 2011-01-14Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Gustafsson, Örjan
By organisation
Department of Applied Environmental Science (ITM)
In the same journal
Environmental Pollution
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 33 hits
ReferencesLink to record
Permanent link

Direct link