MIT engineers have developed a new nanofiltration technology to reduce the environmental impact of aluminum production. This technology helps recycle aluminum ions that would normally be wasted, addressing both growing demand and waste management challenges, as mentioned by MIT News.
Aluminum production is set to increase by 40 percent by the end of the decade, raising environmental concerns. However, MIT has developed a new membrane technology that captures over 99 percent of aluminum ions from waste, improving efficiency and reducing waste. If used widely, this could cut down on hazardous waste and reduce the need for new mining. "This membrane technology not only cuts down on hazardous waste but also enables a circular economy for aluminum by reducing the need for new mining," said John Lienhard, MIT professor, according to MIT News.
The project focuses on addressing the waste of cryolite, a byproduct of aluminum production, which degrades over time and must be replaced. "We learned that for a traditional aluminum plant, something like 2,800 tons of aluminum are wasted per year," said Trent Lee, lead author of the study. The MIT team created a membrane that repels aluminum ions but lets sodium pass through. This membrane could be used on a large scale, similar to desalination plants, to process waste streams. "This paper shows the viability of membranes for innovations in circular economies. This membrane provides the dual benefit of upcycling aluminum while reducing hazardous waste," Lee added. With further development, it could offer a sustainable solution to reduce waste and support the growing demand for aluminum, as reported by MIT News.
