Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Asbestos particle dispersion in the atmosphere from abandoned mine sites
Asbestos-containing rocks near local abandoned asbestos mines such as serpentine have been exposed to weathering for many years and much concern is being voiced about the risk of asbestos particle dispersion. One of the most serious concerns is asbestos fibers liberated from the various sources generating soil contamination through atmospheric dispersion over an extended area.
Thus, this paper aims at predicting the extent and distribution of asbestos soil pollution and defining the target area requiring remediation. Two stages of the study were carried out: (1) a particulate re-entrainment study in the wind tunnel; (2) atmospheric contaminant transport simulation using an Environmental Protection Agency (EPA) atmospheric dispersion model.
The planetary boundary layer was created in the wind tunnel to simulate the surface boundary layer from which the settled particulates are re-entrained into the air stream. Since turbulent intensity is known to be the most critical parameter to determine the re-entrainment, it was controlled during the experiments. Also, a series of study have been carried out to see how the moisture content in soil samples affects the re-entrainment. The maximum value of dispersion rate from the sources defined as grams across unit area per unit time was derived for the subsequent atmospheric transport simulation study. ISCST3 (the US EPA's regulatory model) was applied to predict the short-term as well as long-term transport and settling rate. Meteorological and topographic data at the study site were used for the analysis. The final outcome will be used for determining the target areas for soil treatment.
Asbestos particle dispersion in the atmosphere from abandoned mine sites
Asbestos-containing rocks near local abandoned asbestos mines such as serpentine have been exposed to weathering for many years and much concern is being voiced about the risk of asbestos particle dispersion. One of the most serious concerns is asbestos fibers liberated from the various sources generating soil contamination through atmospheric dispersion over an extended area.
Thus, this paper aims at predicting the extent and distribution of asbestos soil pollution and defining the target area requiring remediation. Two stages of the study were carried out: (1) a particulate re-entrainment study in the wind tunnel; (2) atmospheric contaminant transport simulation using an Environmental Protection Agency (EPA) atmospheric dispersion model.
The planetary boundary layer was created in the wind tunnel to simulate the surface boundary layer from which the settled particulates are re-entrained into the air stream. Since turbulent intensity is known to be the most critical parameter to determine the re-entrainment, it was controlled during the experiments. Also, a series of study have been carried out to see how the moisture content in soil samples affects the re-entrainment. The maximum value of dispersion rate from the sources defined as grams across unit area per unit time was derived for the subsequent atmospheric transport simulation study. ISCST3 (the US EPA's regulatory model) was applied to predict the short-term as well as long-term transport and settling rate. Meteorological and topographic data at the study site were used for the analysis. The final outcome will be used for determining the target areas for soil treatment.
Asbestos particle dispersion in the atmosphere from abandoned mine sites
Lee, Changwoo (Autor:in) / Kim, Dooyoung (Autor:in) / Kil, Sewon (Autor:in)
Geosystem Engineering ; 15 ; 132-141
01.06.2012
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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