Characterization of contaminants and evaluation of the suitability for land application of maize and sludge biochars

Prior to the application of biochar as an agricultural improver, attention should be paid to the potential introduction of toxicants and resulting unintended impacts on the environment. In the present study, the concentrations of polycyclic aromatic hydrocarbons (PAHs), heavy metals, and mineral ele...

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Veröffentlicht in:Environmental science and pollution research international 2014, Vol.21 (14), p.8707-8717
Hauptverfasser: Luo, Fei, Song, Jing, Xia, Weixia, Dong, Mingang, Chen, Mengfang, Soudek, Petr
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Sprache:eng
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Zusammenfassung:Prior to the application of biochar as an agricultural improver, attention should be paid to the potential introduction of toxicants and resulting unintended impacts on the environment. In the present study, the concentrations of polycyclic aromatic hydrocarbons (PAHs), heavy metals, and mineral elements were determined in maize and sludge biochars produced at 100 °C increments between 200 and 700 °C. The concentration ranges of total PAHs were 358–5,136 μg kg⁻¹ in maize biochars and 179–70,385 μg kg⁻¹ in sludge biochars. The total heavy metals were detected at the following concentrations (mg kg⁻¹): Cu, 20.4–56.7; Zn, 59.7–133; Pb, 1.44–3.50; Cd,
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-014-2797-8