Characterisation and enhancement of low-cost optical particle counters for air pollution monitoring in diverse environments

用于不同环境下空气污染监测的低成本光学粒子计数器的表征和增强

• 批准号: 1756140
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1756140
• 关键词: Characterisation; enhancement; low; cost; optical

Respirable particulate matter (PM) is a global health concern andlarge environmental risk factor for morbidity and mortality whichdisproportionately affects developing countries, women andchildren. Measuring PM accurately is technically challenging.Current methods require significant resources to maintain andmodern analytical methods are unable to detect the spatialinhomogeneity of PM concentrations in urban environments.Technological advancements have miniaturised detection methods,reduced costs and increased portability. Therefore, there is apotential for increased spatial and temporal measurements.Laboratory and field evaluations of low-cost optical particlecounters (OPC) show significant artefacts from meteorologicalvariables such as relative humidity (RH) and physicochemicalvariables such as chemical composition and size distribution. Thesevariables can change over short distances in urban environmentsand this project aims to characterise low-cost OPC's against a suiteof state-of-the-art reference instrumentation in diverseenvironments.London has two atmospheric supersites that's allows for evaluationto uniquely take place concurrently at kerbside and urbanbackground locations. Additionally, an indoor campaign will takeplace at a dwelling. This will uniquely provide a diverse range ofaerosol physical and chemical properties that the OPC technologywill be exposed to. An international location will be sought to assessthe correction algorithm and issues facing OPC's in diverse andextreme environments. The above approach will provide a fullcharacterisation of three different low-cost OPC's in environmentswhere they are most likely to be situated. This project will deliver anovel correction algorithm based on aerosol chemistry as well asevidence-based recommendations for future assessment of thisnew technology.

可吸入颗粒物（PM）是一个全球性的健康问题，也是导致发病率和死亡率的重大环境风险因素，对发展中国家、妇女和儿童的影响尤为严重。准确测量PM在技术上具有挑战性。目前的方法需要大量资源来维持，而现代分析方法无法检测城市环境中PM浓度的空间非均匀性。技术进步使检测方法小型化，降低了成本，增加了便携性。因此，有可能增加空间和时间测量。低成本光学粒子计数器（OPC）的实验室和现场评估显示，气象变量（如相对湿度）和物理化学变量（如化学成分和尺寸分布）产生了显著的人工影响。在城市环境中，这些变量可能在短距离内发生变化，该项目旨在通过一系列最先进的参考仪器，在不同的环境中表征低成本的OPC。伦敦有两个大气超级站点，可以同时在路边和城市背景位置进行独特的评估。此外，室内活动将在住宅中进行。这将独特地提供OPC技术将接触到的各种气溶胶物理和化学特性。将寻求一个国际地点来评估OPC在不同和极端环境下面临的校正算法和问题。上述方法将提供三种不同的低成本OPC在它们最有可能位于的环境中的完整特征。该项目将提供基于气溶胶化学的新型校正算法，并为该新技术的未来评估提供基于证据的建议。