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Proposed Method for Investigating the Reactivity of Chlorine with Environmental Materials under Relevant and Controlled Conditions

机译:提出在相关和受控条件下研究环境材料的氯气反应性的方法

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Many common toxic industrial chemicals (TICs) such as chlorine and ammonia are very reactive with commonly encountered materials in the environment. The amount of TIC material reacted in the environment is an important factor in the impact of a release. Typically characterized with a deposition rate in atmospheric dispersion models, the reaction rate and total deposition quantities have predominately been studied in field scale experiments. Laboratory experiments have also been undertaken, but past investigations have inadequately quantified the available turbulence which can importantly impact surface reaction rates. The state of the art description of surface deposition represents the process as a series of resistances including the effect of atmospheric turbulence and surface reaction(s) depending on the surface material (substrate). Sponsored by the Chemical Security Analysis Center (CSAC) of the U.S. Department of Homeland Security and Transport Canada, an experimental program is underway to test potential substrates under known inlet gas concentrations with levels of turbulence that are comparable to those of the atmosphere. The objective is to develop a test methodology for subjecting a substrate to a reactive gas flow of known TIH concentration with turbulence levels consistent with those in the atmosphere. With data from repeat experiments, deposition of a reactive TIH chemical can be quantified with the proposed experimental protocol.
机译:许多常见的有毒工业化学品(TICS)如氯和氨,与环境中的常见材料非常有反应。在环境中反应的TIC材料的量是释放影响的重要因素。通常以大气分散模型的沉积速率表征,反应速率和总沉积量主要已经在现场规模实验中进行了研究。还进行了实验室实验,但过去的调查却不充分地量化了可用的湍流,这是重要的影响表面反应速率。表面沉积的技术描述的状态表示作为一系列电阻的过程,包括根据表面材料(基板)的大气湍流和表面反应的效果。由美国国土安全和运输部的化学安全分析中心(CSAC)赞助,实验计划正在进行在已知入口气体浓度下测试潜在的基材,其湍流水平与大气相当。目的是开发一种用于使基材对已知的TIH浓度的反应性气体流动的测试方法,其与大气中的湍流水平一致。通过来自重复实验的数据,可以通过所提出的实验方案来定量反应性TiH化学物质的沉积。

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