光散射法与β射线衰减-光散射联用法颗粒物在线测量方法对比

发布时间：2018-05-25 19:00

本文选题：β射线衰减法 + 光散射法　；参考：《环境科学研究》2017年03期

【摘要】：为考察光散射法和β射线衰减-光散射联用法的适用性,以β射线衰减法颗粒物自动监测仪(BAM)为标准,于2016年2月4日—4月18日,在中国环境科学研究院利用β射线衰减-光散射联用法颗粒物自动监测仪(MP-CPM)与光散射法传感器对ρ(PM_(10))和ρ(PM_(2.5))测量结果进行了对比.结果表明:(1)MP-CPM与BAM测量ρ(PM_(10))的结果具有较好的一致性,相关系数为0.92,平均相对偏差为0.04%;ρ(PM_(2.5))结果一致性较差,相关系数为0.69,MP-CPM测量ρ(PM_(2.5))整体较高于BAM,平均相对偏差为45.8%.(2)光散射法传感器与BAM测量ρ(PM_(2.5))结果一致性较好,相关系数为0.85,平均相对偏差为11.24%,但ρ(PM_(10))远低于BAM,平均相对偏差为-44.64%.在特殊污染情景下,光散射法将因受到较大影响而严重错估颗粒物浓度.烟花燃放期间,MP-CPM和光散射法传感器严重低估颗粒物浓度,与BAM测量颗粒物浓度的平均相对偏差均低于-50%;沙尘污染过程中,MP-CPM严重高估ρ(PM_(2.5)),与BAM测量ρ(PM_(2.5))结果平均相对偏差为79.27%,光散射法传感器严重低估ρ(PM_(10)),与BAM测量ρ(PM_(10))结果平均相对偏差为-59.35%.研究显示,不同原理的仪器,在不同的使用场景下应该区别对待.
[Abstract]:In order to investigate the applicability of the light scattering method and the 尾 ray attenuation-light scattering method, using the 尾 ray attenuation method as the standard for the automatic monitor of particulate matter (BAM), from February 4 to April 18, 2016, In this paper, the results of 尾 -ray attenuation-light scattering automatic particle monitoring instrument (MP-CPM) and light scattering sensor are compared with those measured by 蟻 _ (P) PMSP _ (10) and 蟻 ~ (+) _ (PMSP) _ (2.5) at the China Institute of Environmental Sciences. The results showed that the results of MP-CPM and BAM were in good agreement with those of BAM. The correlation coefficient was 0.92 and the average relative deviation was 0.04. The correlation coefficient is 0.69mP-CPM, the average relative deviation is 45.80.The correlation coefficient is 0.85 and the average relative deviation is -44.640.The correlation coefficient is 0.85, the average relative deviation is 11.24, but the average relative deviation of 蟻 PMP-CPM is far lower than that of BAM.The average relative deviation is -44.640.The correlation coefficient is 0.85, and the average relative deviation is 11.240.The average relative deviation is -44.640.The correlation coefficient is 0.85 and the average relative deviation is 11.24. Under the special pollution scenario, the light scattering method will seriously misestimate the concentration of particulate matter due to its great influence. MP-CPM and light scattering sensors seriously underestimated the concentration of particulate matter during fireworks discharge. The average relative deviation with BAM was lower than -50, and the average relative deviation between MP-CPM and BAM was 79.270.The average relative deviation between MP-CPM and BAM was -59.350.The average relative deviation between MP-CPM and BAM was -59.35. Research shows that instruments with different principles should be treated differently in different usage scenarios.
【作者单位】：北京化工大学;中国环境科学研究院;江苏省大气环境与装备技术协同创新中心南京信息工程大学;
【基金】：国家自然科学基金项目(41375132,91544226) 美国能源基金会项目(G150623324)
【分类号】：X831

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