Toxic red mud could be turned into ‘green’ steel
Toxic red mud could be turned into ‘green’ steel
Download the Nature Podcast 24 January 2024
In this episode:
0:46 Turning a toxic by-product into iron
Red mud is a toxic by-product of aluminium manufacture, and millions of tonnes of it are produced each year. The majority ends up in landfills, pumped into vast lakes or stored in dried mounds, posing a serious environmental risk. This week, researchers demonstrate how red mud can be reused to make iron, a vital component in the production of steel. As their method uses hydrogen plasma rather than fossil fuels, they suggest it could be a way to reduce the carbon emissions associated with the steelmaking industry.
Research article: Jovičević-Klug et al.
News and Views: Iron extracted from hazardous waste of aluminium production
09:36 Research Highlights
The economics of next-generation geothermal power plants, and the folded-fabric robot that crawls like a snake.
Research Highlight: Flexible geothermal power makes it easier to harness Earth’s inner heat
Research Highlight: Origami fabric robot slithers like a snake
20:53 Briefing Chat
A computational model that predicts a person’s likelihood of developing long COVID, NASA finally crack open the lid of OSIRIS-REx’s sample container, and how the ‘Moon Sniper’ craft pulled off the most precise lunar landing ever.
Nature News: Long-COVID signatures identified in huge analysis of blood protein
Johnson Space Centre: NASA’S OSIRIS-REx Curation Team Reveals Remaining Asteroid Sample
Nature News: Japan’s successful Moon landing was the most precise ever Subscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday.
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Related Knowledge Center: Climate economics
Climate change is now a driver of the world’s economy. The impact is profound:
- Catastrophic weather events — hurricanes, floods, droughts, high temperatures — are more frequent and more extreme. The cost can be measured in both the initial damage caused and the longer-term impact on the economy.
- Vulnerable communities are increasing climate-related investments, hardening infrastructure and taking other protective measures.
- Investment in carbon capture and storage technologies is increasingly rapidly.
- Governments are making investments and crafting regulations to reduce emissions of carbon dioxide and other greenhouse gases.
On top of all of this is the cost of uncertainty. As the Fourth National Climate Assessment, released in 2018 by the U.S. Global Change Research Program, says, “The assumption that current and future climate conditions will resemble the recent past is no longer valid.”