Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Maria Curie-Skłodowska University, 3 Maria Curie-Skłodowska Square, 20-031, Lublin, Poland.
Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Maria Curie-Skłodowska University, 3 Maria Curie-Skłodowska Square, 20-031, Lublin, Poland.
Environ Pollut. 2022 Dec 1;314:120145. doi: 10.1016/j.envpol.2022.120145. Epub 2022 Sep 9.
In this study the persistence (based on extractable, C) and bioavailability (based on freely dissolved content, C) of polycyclic aromatic hydrocarbons (PAHs) in biochar-amended soil was investigated. Biochar produced at 500 or 700 °C from sewage sludge (BC) or sewage sludge and willow (W) mixture (BCW) in an atmosphere of nitrogen (N) or carbon dioxide (CO) was evaluated. The biochars were applied to the real soil (podzolic loamy sand) at a dose of 2% (w/w). The content of C and C PAHs was monitored for 180 days. The biochar production conditions determined the C and C PAHs in the soil. A change of carrier gas from N to CO caused an increase in C PAH losses in the soil from 19 to 75% for the biochar produced from SL and from 49 to 206% for the co-pyrolyzed biochar. As regards C PAHs, the change from N to CO increased the losses of C PAHs only for the biochar derived from SL at a temperature of 500 °C (by 21%). In the soil with the other biochars (produced at 700 °C from SL as well as at 500 and 700 °C from SL/W), the C increased from 17 to 26% compared to the same biochars produced in an atmosphere of N.
在这项研究中，研究了生物炭添加土壤中多环芳烃（PAHs）的持久性（基于可提取的 C）和生物可利用性（基于自由溶解含量 C）。评估了在氮气（N）或二氧化碳（CO）气氛中由污水污泥（BC）或污水污泥和柳树（W）混合物（BCW）在 500 或 700°C 下生产的生物炭。生物炭以 2%（w/w）的剂量添加到实际土壤（灰化壤质沙土）中。监测了 180 天的 C 和 C PAHs 含量。生物炭的生产条件决定了土壤中的 C 和 C PAHs。载气从 N 变为 CO 导致从 SL 生产的生物炭中土壤中 C PAH 损失从 19%增加到 75%，从 CO 变为 CO 导致从 SL 生产的共热解生物炭中 C PAH 损失从 49%增加到 206%。就 C PAHs 而言，仅对于在 500°C 下由 SL 生产的生物炭，从 N 变为 CO 会增加 C PAHs 的损失（增加 21%）。在其他生物炭（在 700°C 下由 SL 生产，以及在 500 和 700°C 下由 SL/W 生产）的土壤中，与在 N 气氛中生产的相同生物炭相比，C 增加了 17%至 26%。
