Analytical and Circular Chemistry, IMO, Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium.
Environmental Biology, Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, 3590, Diepenbeek, Belgium.
Sci Rep. 2024 Jun 17;14(1):13956. doi: 10.1038/s41598-024-62468-3.
Co-pyrolysis of chicken manure with tree bark was investigated to mitigate salinity and potentially toxic element (PTE) concentrations of chicken manure-derived biochar. The effect of tree bark addition (0, 25, 50, 75 and 100 wt%) on the biochar composition, surface functional groups, PTEs and polycyclic aromatic hydrocarbons (PAH) concentration in the biochar was evaluated. Biochar-induced toxicity was assessed using an in-house plant growth assay with Arabidopsis thaliana. This study shows that PTE concentrations can be controlled through co-pyrolysis. More than 50 wt% of tree bark must be added to chicken manure to reduce the concentrations below the European Biochar Certificate-AGRO (EBC-AGRO) threshold. However, the amount of PAH does not show a trend with tree bark addition. Furthermore, co-pyrolysis biochar promotes plant growth at different application concentrations, whereas pure application of 100 wt% tree bark or chicken manure biochar results in decreased growth compared to the reference. In addition, increased plant stress was observed for 100 wt% chicken manure biochar. These data indicate that co-pyrolysis of chicken manure and tree bark produces EBC-AGRO-compliant biochar with the potential to stimulate plant growth. Further studies need to assess the effect of these biochars in long-term growth experiments.
研究了鸡粪与树皮的共热解，以减轻鸡粪生物炭中盐分和潜在有毒元素（PTE）的浓度。评估了树皮添加量（0、25、50、75 和 100wt%）对生物炭组成、表面官能团、PTE 和多环芳烃（PAH）浓度的影响。使用拟南芥进行了内部植物生长测定来评估生物炭诱导的毒性。本研究表明，可以通过共热解来控制 PTE 浓度。必须向鸡粪中添加超过 50wt%的树皮，才能将浓度降低到欧洲生物炭证书-农业（EBC-AGRO）标准以下。然而，随着树皮添加量的增加，PAH 的含量并没有呈现出明显的趋势。此外，共热解生物炭在不同的应用浓度下促进植物生长，而纯应用 100wt%树皮或鸡粪生物炭的生长与对照相比则下降。此外，100wt%鸡粪生物炭观察到植物的应激增加。这些数据表明，鸡粪和树皮的共热解产生符合 EBC-AGRO 标准的生物炭，具有刺激植物生长的潜力。需要进一步的研究来评估这些生物炭在长期生长实验中的效果。
