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首页> 外文会议>Waste management symposium >PREVENTION : A NEW AND MAYBE WISER APPROACH TO THE SURFACE CONTAMINATION ISSUES
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PREVENTION : A NEW AND MAYBE WISER APPROACH TO THE SURFACE CONTAMINATION ISSUES

机译：预防：一种新的，也许更明智的表面污染问题的方法

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A decrease in the efficiency of some decontamination processes may occur after several implementations on the same surface, as recontamination between each implementation can occur. In some situations, achieving decontamination to acceptable levels can become difficult. The origin of this problem has been highlighted and solutions have been found. In fact, by thoroughly cleaning the surface, the decontamination process may lead to an increase of the adhesion of subsequent contaminants, thus making them much more difficult to remove. In concrete terms, some chemical functional groups, such as hydroxides make possible the chemical sorption of metal ions. Simply removing grease or natural pollutants from the surface allows direct contact between the contaminants and these reactive sites, increasing adhesion. If the cleaning process is badly suited to the material to be decontaminated, a modification of the chemical composition of the surface can occur, possibly increasing the density of reactive sites, making the problem worse. Predicting the evolution of the surface chemical properties with time is a challenge. Prevention of surface contamination appears to be a wiser approach. The principle is to prevent strong adhesion of the contaminants by masking the reactive groups likely to chemically bind the contaminants to the surface. With this aim in view, different methods of surface treatments offering such barrier effects have been developed at the French atomic Energy Commission (CEA). One possibility is the use of a removable protective polymer film, which can be used also for decontamination purposes. The other possibility is the vapor phase deposition of inert mineral layers on the surface. In this paper, we will describe both the studies and results that lead us to this prevention approach to the surface contamination problem, and the improvements obtained in terms of decontamination efficiency with this new approach.
机译：在同一表面上的几个实施方式之后可能发生一些去污过程的效率的降低，因为可以发生每个实现之间的再污染。在某些情况下，实现可接受水平的净化可能变得困难。此问题的起源已突出显示，并已找到解决方案。事实上，通过彻底清洁表面，净化过程可能导致随后污染物的粘附性增加，从而使它们更难以去除。具体而言，一些化学官能团，如氢氧化物，使金属离子的化学吸附成为可能。只需从表面上除去润滑脂或天然污染物，允许直接接触污染物和这些反应性位点，增加粘附性。如果清洁过程非常适合待净化材料，则可能发生表面的化学成分的改性，可能会增加反应性位点的密度，使得问题变差。预测表面化学性质随时间的演变是一种挑战。预防表面污染似乎是一个更明智的方法。该原理是通过掩蔽可能将污染物与表面化学结合的反应性基团来防止污染物的强烈粘附。通过这种目标，在法国原子能委员会（CEA）中已经开发了提供这种障碍效应的不同表面处理方法。一种可能性是使用可拆卸的保护性聚合物膜，其也可用于去污目的。其他可能性是惰性矿物层在表面上的气相沉积。在本文中，我们将描述导致我们对这种预防方法的研究和结果进行表面污染问题，并通过这种新方法在去污效率方面获得的改进。

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