A field study of bioavailable polycyclic aromatic hydrocarbons (PAHs) in sewage sludge and biochar amended soils
Autor: | Patryk Oleszczuk, Yong Sik Ok, Daniel C.W. Tsang, Magdalena Stefaniuk |
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Rok vydání: | 2018 |
Předmět: |
Environmental Engineering
010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis Amendment Biological Availability Sewage 010501 environmental sciences 01 natural sciences Biochar Soil Pollutants Environmental Chemistry Polycyclic Aromatic Hydrocarbons Waste Management and Disposal 0105 earth and related environmental sciences Chemistry business.industry Soil classification Pollution Soil contamination Soil conditioner Charcoal Environmental chemistry Soil water business Sludge |
Zdroj: | Journal of Hazardous Materials. 349:27-34 |
ISSN: | 0304-3894 |
Popis: | The bioavailable PAHs (freely dissolved concentration, Cfree) were determined in sewage sludge (SL) or sewage sludge and biochar (BC) amended soil. SL or SL with a 2.5, 5 or 10% of BC was applied to the soil. The study was conducted as a long-term field experiment. Addition of BC to SL at a dose of 2.5 and 5% did not affect the content of Cfree PAHs in soils. However a significant difference (by 13%) in Cfree PAHs content was noted in experiment with 10% addition of BC. During the experiment, the concentration of Cfree PAHs in SL- and SL/BC-amended soil decreased. In particular sampling terms the content of Cfree PAHs in SL/BC-amended soil was significantly lower comparing to the Cfree PAHs content in SL-amended soil. After 18 months, Cfree PAH content was significantly lower in SL/BC-amended soil than in the experiment with SL alone, and did not differ significantly from the Σ16 Cfree content in the control soil. The largest decrease relative to the soil with sewage sludge alone was observed for 3-, 5- and 6-ring PAHs. This is the first field-based evidence that biochar soil amendment was effective to reduce of the Cfree of PAHs in sewage sludge-amended soils. |
Databáze: | OpenAIRE |
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