Linking the field and the atomic scales: Soft x-ray spectroscopy of soil chemical processes

连接领域和原子尺度：土壤化学过程的软 X 射线光谱

基本信息

批准号：
RGPIN-2018-06117
负责人：
Peak, John
金额：
$ 4.38万
依托单位：
University of Saskatchewan
依托单位国家：
加拿大
项目类别：
Discovery Grants Program - Individual
财政年份：
2020
资助国家：
加拿大
起止时间：
2020-01-01 至 2021-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=713615
关键词：
Linking field atomic scales Soft

项目摘要

Several of the grand challenges facing science today involve being able to better manage Earth's soil resources: Feeding 9 Billion people sustainably via intensification of agriculture, preserving our water resources in the face of a changing climate, effectively restoring and rehabilitating damaged ecosystems for future use, and becoming more efficient at the stewardship of nutrients required for living things. Researchers are increasingly turning to synchrotrons as tools to provide a molecular-level understanding of processes occurring in soils and plants to assist in solving these complex problems. In this proposal, we would develop the necessary tools to extend soft x-ray spectroscopy to understand the elements of life (C, N, O, P, S, Ca, Mg, Fe, Cu, Zn) in soil samples. We have two major objectives in this proposal. The first is to fully develop a novel soft x-ray approach, Excitation-Emission Matrix Spectroscopy, to provide wide energy high throughput screening of soil samples. If successful, then synchrotrons would be able to interface with ecological researchers in a more meaningful way by running statistically significant numbers of samples. The second objective is to investigate some of the implications for the newly accepted soil continuum model for how soil organic carbon forms and behaves in natural systems.

当今科学面临的一些巨大挑战包括能够更好地管理地球的土壤资源：通过强化农业来养活90亿人，面对不断变化的气候，可以保留我们的水资源，有效地恢复和恢复受损的生态系统，以使未来的使用，并更加有效地为生活事物的营养而高效。研究人员越来越多地转向同步加动力，作为对土壤和植物中发生的过程的分子级别理解的工具，以帮助解决这些复杂问题。在此提案中，我们将开发必要的工具来扩展柔软的X射线光谱，以了解土壤样品中生命元素（C，N，O，P，S，CA，MG，FE，CU，CU，Zn）。我们在此提案中有两个主要目标。首先是充分开发一种新型的软X射线方法，即激发发射矩阵光谱，以提供宽的能量高吞吐量筛选土壤样品。如果成功的话，那么同步基因将能够通过运行统计学意义的样本来以更有意义的方式与生态学研究人员进行交互。第二个目标是研究对新近接受的土壤连续模型对土壤有机碳在天然系统中的形成和行为的影响。