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Full-Text Articles in Physical Sciences and Mathematics
Optimal Sampling Of A Chemical Hazard Area, Jennifer R. Plourde
Optimal Sampling Of A Chemical Hazard Area, Jennifer R. Plourde
Theses and Dissertations
This thesis proposes a methodology for optimally sampling a chemical hazard area subsequent to a chemical weapons attack. The objective is to identify the maximum number of areas that no longer require protective gear for safe operations. We model the area as an undirected graph and employ network analysis techniques to provide a methodological framework for identifying an optimal sampling sequence within a fixed time limit. We propose four models that characterize the secondary vapor concentrations: i) static and deterministic, ii) static and stochastic, iii) dynamic and deterministic, and iv) dynamic and stochastic. Comparisons of the static cases and their …
An Investigation Into Palladium-Catalyzed Reduction Of Perchlorate In Water, Eric G. Barney
An Investigation Into Palladium-Catalyzed Reduction Of Perchlorate In Water, Eric G. Barney
Theses and Dissertations
In this study, application of a catalytic reactor to facilitate chemical reduction of perchlorate was investigated. Palladium-coated pellets were used as the catalyst, and formic acid was used as the reductant. Reactor performance was evaluated under a variety of operating conditions (influent pH, reductant concentration, residence time). Very little perchlorate reduction was observed under any operating condition. At best, approximately 8% perchlorate reduction was observed. This small reduction efficiency is clearly not sufficient for environmental treatment applications. Perchlorate strongly adsorbed to the catalyst at low pH (3 - 3.3). At higher pH (4 - 10), little adsorption was observed. This …