Everyone was excited when rovers found oxygen-related minerals on Mars. But new experiments show oxygen wasn't needed.
This image shows a chlorate ion and a bromate ion . Could they have been the source of the oxygen that created manganese oxides on Mars? Image Credit: ChemSpider/Royal Society of Chemistry.
Chemicals containing oxygenated chlorine are routinely used to decontaminate water. But chlorine can also be a contaminant. How can introducing another contaminant end up decontaminating drinking water? “Use the metals,” Mitra told Universe Today. “Chlorate is one such oxygenated chlorine compound that has the same properties as bleach. The contaminants will react together to produce products that can be filtered out or are innocuous.
The researchers performed laboratory experiments with both chlorate and bromate to oxide manganese samples in water. The water was made to reproduce the water on ancient Mars, which would’ve been mildly to weakly acidic with a pH between about 3.5 to 6.5 due to the CO2-rich atmosphere. A view from the Opportunity rover on Mars, which explored the rim of Endeavour Crater in 2014. Picture taken on Sol 3,798 in October 2014, while the rover was en route to a small crater called Ulysses. The rover’s wheels overturned some rocks while traversing the rim of the crater, and those rocks contained manganese oxides. Credit: NASA/JPL-Caltech/Cornell Univ./Arizona State Univ.
Mars is a puzzle we’re only beginning to put together, and sometimes we gloss over the many fundamental differences between the two planets. It can be tempting to think of Mars as an “Earth gone wrong.” While Earth still has a magnetosphere, a rich atmosphere, and oceans, Mars might’ve had all of these until something went wrong, and the planet became barren.
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