Details

Autor(en) / Beteiligte

• Godlewska, Paulina
• Jośko, Izabela
• Oleszczuk, Patryk

Titel

Ecotoxicity of sewage sludge- or sewage sludge/willow-derived biochar-amended soil

Ist Teil von

• Environmental pollution (1987), 2022-07, Vol.305, p.119235-119235, Article 119235

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2022

Quelle

MEDLINE

Beschreibungen/Notizen

• Co-pyrolysis of sewage sludge (SL) with plant biomass gains attention as a way to minimize SL-derived biochar drawbacks, such as high amount of toxic substances, low specific surface area and carbon content. The toxicity of soil amended with SL- (BCSL) or SL/biomass (BCSLW)-derived biochar was evaluated in long-term pot experiment (180 days). The results were compared to SL-amended soil. Biochars produced at 500, 600, or 700 °C were added to the soil (podzolic loamy sand) at a 2% (w/w) dose. Samples were collected at four different time points (at the beginning, after 30, 90 and 180 days) to assess the potential toxicity of SL-, BCSL- or BCSLW-amended soil. The bacteria Aliivibrio fischeri (luminescence inhibition – Microtox), the plant Lepidium sativum (root growth and germination inhibition test – Phytotoxkit F), and the invertebrate Folsomia candida (mortality and reproduction inhibition test – Collembolan test) were used as the test organisms. Depending on the organism tested and the sample collection time point variable results were observed. In general, SL-amended soil was more toxic than soil with biochars. The leachates from BCSLW-amended soil were more toxic to A. fischeri than leachate from BCSL-amended soil. A different tendency was observed in the case of phytotoxicity. Leachate from BCSL-amended soil was more toxic to L. sativum compared to BCSLW-amended soil. The effect of biochars on F. candida was very diversified, which did not allow a clear trend to be observed. The toxic effect of SL-, BCSL- or BCSW-amended soil to particular organisms was observed in different time, point's periods, which may suggest the different factors affecting this toxicity. [Display omitted] •Sewage sludge (SL)-amended soil was more toxic than soil with biochars.•In most cases SL-derived biochar was more toxic to plants than co-pyrolyzed biochar.•The toxic effect was observed in various periods suggesting the different factors affecting toxicity.•The influence of pyrolysis temperature on biochar toxicity was clearly visible.