通过可视化 NH3 和 pH 的微观异质性,追踪乳制品加工污泥改良土壤中的 N2O(短期通讯)

IF 3.8 Q2 ENVIRONMENTAL SCIENCES Atmospheric Environment: X Pub Date : 2024-08-01 DOI:10.1016/j.aeaoa.2024.100283
Yihuai Hu , Theresa Merl , Johanna Pedersen , Marie Louise Bornø , Azeem Tariq , Klaus Koren , Sven Gjedde Sommer
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引用次数: 0

摘要

有机废物和动物粪便排放的一氧化二氮(N2O)会导致气候变化,并危及我们的生态系统。要开发高效的减缓技术,就必须深入了解排放过程。这可以通过对原位土壤剖面和排放过程中铵(NH4+)的转化进行非破坏性的时间测量来获得。平面光电成像是一种非破坏性测量方法,可用于观察土壤系统中氨(NH3)和 pH 值的时空变化。在这项研究中,用乳品加工污泥(DPS)改良过的土壤在静态箱中培养了 23 天,并同时测量了土壤中温室气体排放量、NH3 浓度和 pH 值。目的是研究应用不同的平面光栅提供信息的潜力,以便深入了解一氧化二氮的排放过程。DPS 作为表层(SL)应用于土壤,未经处理的土壤作为对照(CK)。在监测土壤 pH 值和 NH3 浓度时空变化的同时,我们还测量了 N2O 的排放量。可视化的土壤微尺度异质性有助于更好地了解一氧化二氮的排放过程。虽然技术上的挑战(如 NH3 光学传感器的湿度灵敏度和试验室的气密性)仍有待克服,但该方法是研究施用不同类型土壤改良剂后土壤过程的一种很有前途的非破坏性方法。
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Tracing N2O from dairy processing sludge amended soil with visualizing microscale heterogeneity of NH3 and pH (Short Communication)

Nitrous oxide (N2O) emissions from organic waste and animal slurry contribute to climate change and endanger our ecosystems. For the development of efficient mitigation technologies, in-depth knowledge of emission processes is needed. This can be obtained by non-destructive, temporal measurements of in-situ soil profiles and the transformation of ammonium (NH4+) during events of emissions. Planar optode imaging is a non-destructive measuring method that can be used to visualize spatiotemporal changes of ammonia (NH3) and pH in soil systems. In this study, soil amended with dairy processing sludge (DPS) was incubated in static chambers for 23 days, and GHG emissions, NH3 concentrations and pH in the soil were measured simultaneously over time. The aim was to investigate the potential of applying different planar optodes to provide information that gives insight into processes of N2O emissions. The DPS was applied to the soil as a surface layer (SL), with untreated soil as a control (CK). We were able to measure N2O emissions while monitoring spatiotemporal changes of soil pH and NH3 concentrations. The visualized microscale heterogeneity of the soil contributed to a better understanding of N2O emission processes. While technical challenges (e.g., humidity sensitivity of the NH3 optode and airtightness of the chambers) still need to be overcome, the method is a promising non-destructive method to study soil processes after application of different types of soil amendments.

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来源期刊
Atmospheric Environment: X
Atmospheric Environment: X Environmental Science-Environmental Science (all)
CiteScore
8.00
自引率
0.00%
发文量
47
审稿时长
12 weeks
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