|2008 Joint Meeting of The Geological Society of America, Soil Science Society of America, American Society of Agronomy, Crop Science Society of America, Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM|
|Paper No. 345-9|
|Presentation Time: 10:00 AM-10:15 AM|
Physical and Biological Hazards of Lunar Dust and Their Impact on Habitat and Space Suit Design
COOPER, Bonnie L., Astromaterials Research and Engineering Science, NASA Lyndon B. Johnson Space Center/Oceaneering Space Systems, 2101 Nasa Parkway, Houston, TX 77573, firstname.lastname@example.org, MCKAY, David S., Astromaterials Research and Engineering Science, NASA Lyndon B. Johnson Space Center, 2101 NASA Parkway Code KA, Houston, TX 77573, JAMES, John T., Toxicology Research Department, NASA Lyndon B. Johnson Space Center, 2101 NASA Parkway Code SF2, Houston, TX 77058, WALLACE, William T., Universities Space Research Association, Houston, TX 77058, TAYLOR, Lawrence A., University of Tennessee at Knoxville, Knoxville, TN 37996-1410, and LAM, Chiu-Wing, Toxicology Research Department, NASA Lyndon B. Johnson Space Center, 2101 NASA Parkway Code (JSC-SF)[WLS], Houston, TX 77058|
Lunar dust is highly abrasive because of the space environment in which it formed. On Earth, while dust is a nuisance, it does not adhere to surfaces to the same extent as lunar dust, which is devoid of water and thus capable of significant electrostatic charging. Lunar dust and soil grains are irregularly shaped and stick to fabric more tenaciously than would terrestrial dust. Lunar dust may be hazardous to people when it finds its way inside space suits or into crew living quarters. The finest fraction of lunar soil, less than three micrometers in diameter, can lodge in the lungs when inhaled. Preliminary studies suggest that the inhalation of lunar dust may pose a non-negligible health hazard. The Apollo crews were only exposed for a few days at most, but future crews may be exposed for weeks or months. The nanophase iron in lunar dust may also pose a health hazard, because the reduced metallic iron present in most glassy particles and on mineral grain surfaces can be dissolved in the lungs and then move into the bloodstream, possibly reaching toxic levels. An airlock, suit lock, or mud-room is crucial for reducing the amount of dust to which crewmembers are exposed. Moreover, air filters within habitable areas should be designed to capture particles that are less than 3 microns in size. The air quality within space suits as well as in the vehicle or habitat should be monitored and managed in order to minimize risk to humans of lung diseases or blood poisoning from excess iron. Suit designers must be cognizant of the difficulties of removing lunar dust from traditional fabrics using brushes or other ordinary methods, and they must have a good understanding of the way that lunar dust can affect bearings and seals in space suits.
2008 Joint Meeting of The Geological Society of America, Soil Science Society of America, American Society of Agronomy, Crop Science Society of America, Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM
General Information for this Meeting
|Presentation Handout (.pdf format, 4960.0 kb)|
|Session No. 345|
Living on a Dusty Moon
George R. Brown Convention Center: 310AD
8:00 AM-12:00 PM, Thursday, 9 October 2008
Geological Society of America Abstracts with Programs, Vol. 40, No. 6, p. 553
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