排序方式: 共有18条查询结果,搜索用时 21 毫秒
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Thomas R. Dittrich C. Richard Cothern 《Journal of the Air & Waste Management Association (1995)》2013,63(11):716-719
Trace metals collected on filter paper by a hi-volume air sampler for 24 hours were analyzed using the X-ray fluorescence method. A gamma ray exciting source (241Am) and a bremsstrahlung exciting source (147Pm) were both used to produce the X-rays, the latter being more efficient. For the samples collected in Dayton, several metals were detected, viz.: Ti, Fe, Cu, Zn, Pb, Cd, and Sn. Elements in the periodic table between Ti and Cs were seen to have a sensitivity limit of 0.5 micrograms/m3 of air. 相似文献
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Dittrich Ernő Klincsik Mihály Somfai Dávid Dolgos-Kovács Anita Kiss Tibor Szekeres Anett 《Environmental science and pollution research international》2021,28(5):5180-5204
Environmental Science and Pollution Research - We worked out a method in Maple environment to help understand the difficult transport processes in horizontal subsurface flow constructed wetlands... 相似文献
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Dittrich Ernő Klincsik Mihály Somfai Dávid Dolgos-Kovács Anita Kiss Tibor Szekeres Anett 《Environmental science and pollution research international》2021,28(13):15966-15994
Environmental Science and Pollution Research - This paper offers a novel application of our model worked out in Maple environment to help understand the very complex transport processes in... 相似文献
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Z. Janour K. Jurcakova K. Brych F. Dittrt F. Dittrich 《Process Safety and Environmental Protection》2010,88(3):185-190
A gaseous dispersion over a complex urban area after an accident with a leakage of chlorine in a chemical factory is investigated experimentally in a wind tunnel experiment under neutral conditions by using a Laser Doppler Anemometer and Analyser IREX. Diffusion fields in a turbulent boundary layer are simulated using a model of a landscape surrounding the factory at a scale of 1:1000. The obtained results indicate that morphology is one of the important parameters in studying atmospheric diffusion. The strong turbulent mixing inside the urban surface layer has created a rapid decrease in the surface concentrations. Moreover, the diffusion measured in these experiments may be used to develop and evaluate operational models to predict the dispersion of chlorine in a chemical factory. 相似文献