Characterization of Lunar Dust for Toxicological Studies. II: Texture and Shape Characteristics
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Volume 21, Issue 4
Abstract
The morphology (shape and texture) of dust fractions of five Apollo lunar soils and a lunar dust simulant, JSC-1Avf, was studied using scanning electron microscopy. Shape (aspect ratio and complexity) of particles was described based on the two-dimensional projection images. The distributions of aspect ratio and complexity of particles are reported. It was determined that the Apollo lunar dust particles consist mainly of impact-produced glass, with complicated morphologies, extensive surface areas per grain, and sharp, jagged edges. Importantly, many grains contain elaborate vesicular textures, representing minute agglutinates. Dust simulant JSC-1Avf also has similar shapes as lunar dust, but differs in surface texture and area (smooth and nonvesicular). These data provide information for toxicity studies of lunar dust and for selecting a suitable lunar dust simulant.
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Acknowledgments
The writers would like to thank three anonymous reviewers for their constructive comments. They also thank Yinghong Liu and Gregory Jones for their assistance with the SEM instruments, and Dr. David Joy for the access to his electron microscopy laboratories. This work is partially supported by a NASA contract from JSC for dust mitigation studies, for which we are grateful. Additional funding was provided by the Planetary Geosciences Institute.
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Published In
Journal of Aerospace Engineering
Volume 21 • Issue 4 • October 2008
Pages: 272 - 279
Copyright
© 2008 ASCE.
History
Received: Sep 14, 2006
Accepted: Dec 6, 2006
Published online: Oct 1, 2008
Published in print: Oct 2008
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