Abstract The collection efficiency of the DustScan DS100 directional sticky pad dust gauge has been analysed in order to estimate airborne dust concentrations for use in atmospheric dispersion models. A DS100 directional sticky pad dust monitor was tested for 10 months at a quarry boundary with respect to a Wilson and Cook (WAC) sampler, with comparisons primarily made with regard to directional wind speeds over the relevant monitoring periods, as recorded by an on-site meteorological station. The mass of dust collected using the DS100 monitor fluctuated between 3.1% and 21.3% of that caught by the WAC sampler over each period. Variations in collection efficiency were modelled using the count of wind speeds per half hour period and two distinct periods were observed. The main trend showed that higher wind speeds decreased relative DS100 efficiency, with low wind speed ( 5 m/s) periods showing modelled efficiency above 10% and below 5% respectively in comparison to the WAC sampler. However, a central period of 9 weeks during the monitoring study showed a reverse of this pattern, with significant wind speeds over 5 m/s correlating with higher DS100 efficiency. Although dust catch on each sampler varied significantly over the study period, an average DS100 efficiency of approximately 7% in comparison to the WAC is suggested for use in estimating airborne dust concentrations for use in atmospheric dispersion models.

中文翻译：

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被动粉尘采样器的相对效率：粗粉尘扩散建模的进展

摘要 分析了 DustScan DS100 定向粘垫灰尘计的收集效率，以估计空气中灰尘浓度以用于大气扩散模型。DS100 定向粘性垫尘监测器在采石场边界使用威尔逊和库克 (WAC) 采样器进行了 10 个月的测试，主要针对相关监测期间的定向风速进行了比较，如上-现场气象站。使用 DS100 监测器收集的灰尘质量在每个时期内波动在 WAC 采样器捕获的灰尘质量的 3.1% 和 21.3% 之间。收集效率的变化使用每半小时的风速计数进行建模，并观察到两个不同的时期。主要趋势表明，较高的风速会降低 DS100 的相对效率，与 WAC 采样器相比，低风速 (5 m/s) 周期显示建模效率分别高于 10% 和低于 5%。然而，监测研究期间 9 周的中心时间显示出这种模式的逆转，显着的风速超过 5 m/s 与更高的 DS100 效率相关。尽管在研究期间每个采样器上的灰尘捕获量变化很大，但建议将 DS100 的平均效率与 WAC 相比大约为 7%，用于估算大气扩散模型中使用的空气传播灰尘浓度。与更高的 DS100 效率相关的显着风速超过 5 m/s。尽管在研究期间每个采样器上的灰尘捕获量变化很大，但建议将 DS100 的平均效率与 WAC 相比大约为 7%，用于估算大气扩散模型中使用的空气传播灰尘浓度。与更高的 DS100 效率相关的显着风速超过 5 m/s。尽管在研究期间每个采样器上的灰尘捕获量变化很大，但建议将 DS100 的平均效率与 WAC 相比大约为 7%，用于估算大气扩散模型中使用的空气传播灰尘浓度。