Towards ultra-trace element measurements in organic-rich samples: tracing past and modern environmental changes

富含有机物样品中的超痕量元素测量:追踪过去和现代的环境变化

基本信息

  • 批准号:
    NE/T00889X/1
  • 负责人:
  • 金额:
    $ 38.02万
  • 依托单位:
  • 依托单位国家:
    英国
  • 项目类别:
    Research Grant
  • 财政年份:
    2019
  • 资助国家:
    英国
  • 起止时间:
    2019 至 无数据
  • 项目状态:
    已结题

项目摘要

Earth's environment is everchanging. The causes and consequences of environmental changes are complex and represent a significant research frontier from which significant academic and societal impact can be derived if overcome. However, our capacity to study them are currently limited by our ability to measure a range of key biogeochemical tracers in environmental archives using state-of-art techniques. We aim to take a new step in analytical environmental geochemistry by setting up an ultra-trace element measurement facility specifically designed to interogate samples tracing past and present environmental change to understand i) how the Earth became habitable; ii) how anthropogenic activity affects climate, oceans, soils and groundwater and; iii) fingerprint sources of critical metals for a greener economy. Current limitations hinge around the challenging aspect of environmental archives which are typically rich in organic material difficult to digest, and the fact that key biogeochemical tracers are both in very low-abundance and affected by detrimental interferences in mass spectrometers. We will remedy these issues by setting up Microwave Digestion triple quadrupole ICP-MS facility (MD-Qubed) specifically designed to measure very low-abundance of technically challenging trace-elements in organic-rich samples. By allowing the quantification of the cycling of key biogeochemical tracers present in ultra-low level in environmental archives across the entire periodic table, this unique analytical facility will enable groundbreaking studies to tackle first order challenges pertaining to Earth's past, present and future environmental changes. Indeed, if some compounds like phosphate and nitrate are critical nutrients for life, others like uranium or arsenic are poisonous. Determination of the abundance of such geochemical tracers in organic-rich sediments precipitated from the oceans can act as fingerprints of past ocean chemistry. For instance, phosphate-levels in these samples can inform about nutrient limitation in past oceans and help decipher controls on the evolution of life. Other elements, like uranium, selenium and molybdenum, in the same sediments, or boron and lithium in marine carbonate archives (e.g., foraminifera, corals), may respectively tell about oxygen and carbon level of the oceans and atmosphere. Similarly, we aim to understand the distribution and mobility of anthropogenically-derived poisonous elements (e.g: uranium, arsenic, cadmium, cobalt...) in water, soils and sediments, and their impact on modern life-forms. Thus, studying elements in geological and modern samples is critical for tracing both past and modern environmental changes. A key aim of our facility will also be to develop methods to trace anthropogenic pollution related to mining and industrial activities but also sources of critical metals for a greener future. The improved detection limits of the MD-Qubed facility will allow tracing of key trace metals such selenium and tellurium in soils, elements that are necessary for a transition towards the green technology revolution. We will also take advantage of this technology to trace radionuclides (e.g., uranium, plutonium,...) in samples and marine organisms to examine potential toxicity and mobility through the Earth System. Such studies will work towards adapting viable mining approaches and the potential for pollution remedies for a greener sustainable future environment.Finally, setting up such a unique facility in Wales and the South West of the UK will benefit a large range of research groups interested in environmental changes, both regionally and nationally. It will also complement the newly set-up Cardiff Earth Laboratory for Trace Element and Isotope Chemistry (CELTIC) and doing so establish a new cutting-edge analytical facility in this region.
地球的环境是不断变化的。环境变化的原因和后果是复杂的,是一个重要的研究前沿,如果克服这些前沿问题,可以产生重大的学术和社会影响。然而,我们目前研究它们的能力受到我们使用最先进技术测量环境档案中一系列关键生物地球化学示踪剂的能力的限制。我们的目标是在分析环境地球化学方面迈出新的一步,建立一个专门设计的超痕量元素测量设备,以跟踪跟踪过去和现在的环境变化的样品,以了解i)地球如何变得宜居;ii)人类活动如何影响气候、海洋、土壤和地下水;iii)关键金属的指纹来源,以实现更绿色的经济。目前的局限性在于环境档案具有挑战性,这些档案通常含有难以消化的有机物质,而且关键的生物地球化学示踪剂丰度很低,而且受到质谱仪中有害干扰的影响。我们将通过建立微波消解三重四极电感耦合等离子体质谱仪(MD-QUBED)来纠正这些问题,该设备专门设计用于测量富含有机物质的样品中极低丰度的具有技术挑战性的微量元素。通过在整个元素周期表中对环境档案中超低水平存在的关键生物地球化学示踪剂的循环进行量化,这一独特的分析设施将使开创性研究能够应对与地球过去、现在和未来环境变化有关的一系列挑战。事实上,如果说磷酸盐和硝酸盐等化合物是生命的关键营养素,那么铀或砷等其他化合物则是有毒的。确定从海洋中沉积的富含有机物质的沉积物中这种地球化学示踪剂的丰度,可以作为过去海洋化学的指纹。例如,这些样本中的磷酸盐水平可以告知过去海洋中的营养限制,并有助于破译对生命进化的控制。其他元素,如同一沉积物中的铀、硒和钼,或海洋碳酸盐档案(如有孔虫、珊瑚)中的硼和锂,可能分别反映了海洋和大气的氧和碳水平。同样,我们的目标是了解人类来源的有毒元素(例如:铀、砷、镉、钴……)的分布和迁移性。在水、土壤和沉积物中,以及它们对现代生命形式的影响。因此,研究地质和现代样品中的元素对于追踪过去和现代环境变化至关重要。我们设施的一个关键目标还将是开发方法,以追踪与采矿和工业活动有关的人为污染,以及关键金属的来源,以实现更绿色的未来。MD-QUBED设施检测限度的改进将使人们能够追踪土壤中的关键痕量金属,如硒和碲,这些元素是向绿色技术革命过渡所必需的。我们还将利用这项技术来追踪放射性核素(如铀、钚等)。在样品和海洋生物中检测潜在的毒性和在地球系统中的流动性。这类研究将致力于采用可行的采矿方法和潜在的污染补救措施,以实现更绿色、可持续的未来环境。最后,在威尔士和英国西南部建立这样一个独特的设施将使区域和国家范围内对环境变化感兴趣的大量研究小组受益。它还将补充新设立的加的夫地球微量元素和同位素化学实验室(凯尔特人),这样做将在该地区建立一个新的尖端分析设施。

项目成果

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Morten Bugge Andersen其他文献

Morten Bugge Andersen的其他文献

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{{ truncateString('Morten Bugge Andersen', 18)}}的其他基金

NSFGEO-NERC: Constraining the oxic marine sink of novel metal isotope proxies to underpin paleoceanographic reconstructions
NSFGEO-NERC:限制新型金属同位素代理的含氧海洋汇以支持古海洋学重建
  • 批准号:
    NE/V004824/1
  • 财政年份:
    2020
  • 资助金额:
    $ 38.02万
  • 项目类别:
    Research Grant

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