工业园区典型VOCs污染过程精细化溯源

以上海某化工工业园区为目标区域,针对典型的大气VOCs污染过程,通过耦合高时间分辨率GC-MS在线监测、拉格朗日大气扩散模型、VOCs源谱及相似度分析等技术手段,开展了小尺度大气VOCs的精细化溯源.结果表明,针对敏感点监测到的VOCs高值时刻,拉格朗日大气扩散模型能够追踪主要的气团来向及企业潜在贡献,空间分辨率达到1...

Fine source tracing of typical VOCs pollution episodes around industrial park

A chemical industrial park in Shanghai was selected as the target area. Aiming at the typical process of atmospheric VOCs pollution, sources of small-scale atmospheric VOCs were traced by coupling high-time resolution GC-MS measurement, Lagrange atmospheric dispersion model, VOCs source profiles and similarity analysis. The Lagrange atmospheric dispersion model can track the direction of the main air masses and the potential contribution of the enterprise with a spatial resolution of 110m×110m; Based on the similarity analysis between the receptor and source profiles, the potential sources can be furtherly identified. The cosine similarity coefficient of high similarity enterprises can reach more than 0.8 (maximum of 1), indicating high accuracy and credibility of the source apportionment results.