PDF(Pubmed)
Abstract：
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.
摘要：
研究了鸡粪与树皮的共热解，以减轻鸡粪衍生的生物炭的盐度和潜在有毒元素（PTE）浓度。树皮添加（0、25、50、75和100wt％）对生物炭组成的影响，表面官能团，评估了生物炭中的PTEs和多环芳烃（PAH）浓度。使用拟南芥的内部植物生长测定来评估生物炭诱导的毒性。这项研究表明，可以通过共热解控制PTE浓度。必须将超过50wt％的树皮添加到鸡粪中，以将浓度降低到欧洲生物炭证书-AGRO（EBC-AGRO）阈值以下。然而,PAH的量与树皮的添加没有趋势。此外，在不同的施用浓度下，共热解生物炭促进植物生长，与参考相比，纯施用100wt％的树皮或鸡粪生物炭导致生长下降。此外,对于100wt％的鸡粪生物炭，观察到植物胁迫增加。这些数据表明，鸡粪和树皮的共热解产生符合EBC-AGRO的生物炭，具有刺激植物生长的潜力。进一步的研究需要评估这些生物炭在长期生长实验中的作用。
