Impact of activated carbon, biochar and compost on the desorption and mineralization of phenanthrene in soil

Geoffrey Marchal, Kilian E.C. Smith, Arno Rein, Anne Winding, Lis Wollensen de Jonge, Stefan Trapp, Ulrich G. Karlson

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Sorption of PAHs to carbonaceous soil amendments reduces their dissolved concentrations, limiting toxicity but also potentially biodegradation. Therefore, the maximum abiotic desorption of freshly sorbed phenanthrene (≤5 mg kg−1) was measured in three soils amended with activated carbon (AC), biochar or compost. Total amounts of phenanthrene desorbed were similar between the different soils, but the amendment type had a large influence. Complete desorption was observed in the unamended and compost amended soils, but this reduced for biochar (41% desorbed) and AC (8% desorbed). Cumulative amounts mineralized were 28% for the unamended control, 19% for compost, 13% for biochar and 4% for AC. Therefore, the effects of the amendments in soil in reducing desorption were also reflected in the extents of mineralization. Modeling was used to analyze key processes, indicating that for the AC and charcoal treatments bacterial activity did not limit mineralization, but rather desorption into the dissolved phase.
Original languageEnglish
JournalEnvironmental Pollution
Volume181
Pages (from-to)200-210
ISSN0269-7491
DOIs
Publication statusPublished - 2013

Keywords

  • Soil
  • Activated carbon
  • Biochar
  • Compost
  • Phenanthrene

Fingerprint

Dive into the research topics of 'Impact of activated carbon, biochar and compost on the desorption and mineralization of phenanthrene in soil'. Together they form a unique fingerprint.

Cite this