Atmospheric diffusion profiles and health risks of typical VOC: Numerical modelling study
Atmospheric diffusion profiles and health risks of typical VOC: Numerical modelling study
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典型 VOC 的大气扩散曲线和健康风险：数值模型研究
DOI：
10.1016/j.jclepro.2020.122982
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发表时间：
2020-12
影响因子：
11.1
通讯作者：
Taicheng An
中科院分区：
文献类型：
--
作者：
Ting Zhang;Guiying Li;Yingxin Yu;Yuemeng Ji;Taicheng An
摘要建立了一个基于数据的大气化学物质传输模型两个关键的地形参数影响VOC的扩散轮廓在高湿度和高风速下排放的VOC传输水平增强大多数儿童比成年人代表高但往往被忽视的VOC暴露风险挥发性有机化合物（VOC）主要来自工业生产。了解挥发性有机物的大气扩散规律对减少排放具有现实意义。在这里，挥发性有机化合物的传输范围进行了分析，空气动力学建模，并验证了现场监测。结合地形演变模型，得到了典型挥发性有机化合物的时空分布规律，以及风速风向对地形参数的影响。模型输出结果表明，低海拔景观经历了显着的变化时，伴随着强剪切流制度与非均匀风速的VOC浓度分布。案例研究表明，工业园区内外VOC浓度比分别增加了13.0%和24.2%，低风速和高湿度是VOC远距离传输的优势。高比例来自工业园区的VOC大气扩散，对周边居民构成极大的暴露风险。因此，从模型中生成了特定时间健康风险的空间图，证明VOC浓度积累会比成人增加学龄儿童的风险。总的来说，解决挥发性有机化合物扩散过程中对职业工人和居民的影响，将建议一个有价值的参考决策的减排战略和提高认识的健康风险干预措施。
HighlightsA data-based atmospheric chemistry-species transport model is developedTwo key topography parameters influence VOC diffusion profilesEmitted VOC transport levels are enhanced under high humidity and wind speedsMost children represent high yet often overlooked VOC exposure risks than adultsVolatile organic compounds (VOC) are dominantly from industrial production. Comprehension of atmospheric diffusion of VOC is realistic to discharge reduction. Here, transport ranges of VOC were analyzed by aerodynamics modelling, and validated with on-site monitoring. By combining a terrain evolution model, spatiotemporal distributions of typical VOC, the impacts of wind speeds and directions in relation to topographical parameters were acquired. The model outputs show that the low elevation landscapes experience significant variation in concentration distributions of VOC when accompanied by strong shear flow regimes with non-uniform wind velocities. Case studies suffer 13.0% and 24.2% increases of VOC concentration ratio outside/inside industry park, with long-range transport of VOC indicated by dominances of lower wind speeds and higher humidity. High ratio, from atmospheric diffusion of VOC from industry park, poses great exposure risk to surrounding residents. The spatial map of time-specific health risks, proving VOC concentration accumulation enhancing risks of school-aged children than adults, was consequently produced from models. Overall, addressing the impact of regularities during VOC diffusion on occupational workers and residents will suggest a valuable reference for decision-making of emission-abatement strategies and awareness-raising health-risk interventions.
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发表时间：
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