Martian dust is primarily composed of silicates and contains high levels of iron and sulfur, as well as phosphorus, calcium sulfates, perchlorates, and reactive iron compounds. Perchlorates may affect thyroid function, while some reactive iron compounds can cause cell damage. Although Martian dust grains are more rounded than the sharp-edged lunar dust, their small size raises concerns regarding their health and technical impacts.
The health risk lies in the ability of fine particles to penetrate deep into the lungs, while some may reach the bloodstream. As for the ultra-fine particles, they may, under certain conditions, be able to reach the brain via the olfactory pathway. The severity of the effects depends on the amount of dust inhaled and the duration of exposure.
To address these challenges, NASA is testing the ability of spacesuit materials to resist Martian dust. "Perseverance" carries five samples of materials used in suit manufacturing, including Teflon and Vectran, which have been mounted on the calibration targets of the "SHERLOC" and "PIXL" instruments to monitor their interaction with dust under actual conditions on the planet's surface.
The results of these tests are sent to engineers to be utilized in developing more dust-resistant materials, helping to improve the protection of spacesuits, habitat modules, and equipment during future human missions to Mars.
