Work

Effect of ageing on the properties and polycyclic aromatic hydrocarbon composition of biochar

Year: 2017

Type: article

Abstract: , respectively. Concentrations of the 16 US EPA PAHs decreased following field ageing, but the proportion of low molecular weight PAHs increased. The observed changes in PAH composition with field ageing can be explained by uptake from the surrounding soil and intra-biochar transfer processes. To better understand changes in PAH composition with ageing, an additional broad range of alkylated PAHs was also analyzed in selected samples. Our results show that the tested artificial ageing protocols are unable to approximate the changes in PAH composition resulting from field ageing. Nevertheless, total and bioaccessible PAH concentrations decreased for both artificially and field-aged biochars, indicating that biochars release PAHs when they are freshly produced and that the risk of PAH release decreases with ageing.

Source: Environmental Science Processes & Impacts

DOI: 10.1039/c7em00116a

Authors: Gabriel Sigmund, Thomas D. Bucheli, Isabel Hilber, Vesna Micić, Melanie Kah, Thilo Hofmann

Institution: University of Vienna

Language: English

Topic: Toxic Organic Pollutants Impact

Subfield: Health, Toxicology and Mutagenesis

Field: Environmental Science

Domain: Physical Sciences

Open Access status: hybrid

Funders: European Cooperation in Science and Technology, Bundesministerium für Land- und Forstwirtschaft, Umwelt und Wasserwirtschaft

Award: G2992524982