Scientists Figure Out How to Recycle Aluminum Foil Into an Ingredient for Biofuel


A whole lot of aluminum foil ends up in landfills each year—some 22,000 tons in the UK alone. Like cans, aluminum foil can be recycled, but because we tend to use foil to pack food, that’s a tricky proposition. Many recycling centers won’t take dirty aluminum foil, since the contamination from greasy and oily food can damage recycling equipment. New research led by engineers at Queen's University Belfast in Northern Ireland has found another way to make use of that old aluminum foil, even if it does have food stuck to it.

As New Atlas reports, the study in Scientific Reports introduces a crystallization method that allows contaminated foil to be transformed into pure aluminum salt crystals. This can be turned into a chemical catalyst to make dimethyl ether, a biofuel that is considered a promising alternative energy source, especially to run diesel engines.

Essentially, the researchers dissolved the foil in a chemical solution that turned it into crystals, then used another chemical mixture to purify those crystals. The resulting 100 percent pure aluminum salts can be used to create alumina catalyst, a key ingredient for making dimethyl ether.

Alumina catalyst created by the tinfoil process would be cheaper than the current commercial version, according to a press release from the university. It costs about $72 per pound, compared to $183 per pound for the existing commercial catalyst.

In addition, the commercially available catalyst is made from bauxite ore, and like many materials that need to be mined from deep within the earth, obtaining bauxite is a resource-intensive process with major environmental costs. So if this technique lives up to its promise, the benefits of being able to recycle even food-soiled aluminum for a second use would be two-fold. It would save used aluminum from the landfill, and allow researchers to produce more of this biofuel without causing environmental harm.

[h/t New Atlas]

Amazon's Under-the-Radar Coupon Page Features Deals on Home Goods, Electronics, and Groceries

Stock Catalog, Flickr // CC BY 2.0
Stock Catalog, Flickr // CC BY 2.0

This article contains affiliate links to products selected by our editors. Mental Floss may receive a commission for purchases made through these links.

Now that Prime Day is over, and with Black Friday and Cyber Monday still a few weeks away, online deals may seem harder to come by. And while it can be a hassle to scour the internet for promo codes, buy-one-get-one deals, and flash sales, Amazon actually has an extensive coupon page you might not know about that features deals to look through every day.

As pointed out by People, the coupon page breaks deals down by categories, like electronics, home & kitchen, and groceries (the coupons even work with SNAP benefits). Since most of the deals revolve around the essentials, it's easy to stock up on items like Cottonelle toilet paper, Tide Pods, Cascade dishwasher detergent, and a 50 pack of surgical masks whenever you're running low.

But the low prices don't just stop at necessities. If you’re looking for the best deal on headphones, all you have to do is go to the electronics coupon page and it will bring up a deal on these COWIN E7 PRO noise-canceling headphones, which are now $80, thanks to a $10 coupon you could have missed.

Alternatively, if you are looking for deals on specific brands, you can search for their coupons from the page. So if you've had your eye on the Homall S-Racer gaming chair, you’ll find there's currently a coupon that saves you 5 percent, thanks to a simple search.

To discover all the deals you have been missing out on, head over to the Amazon Coupons page.

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The Northern Lights Storms Are Getting Names—and You Can Offer Up Your Suggestions

A nameless northern lights show in Ylläs, Finland.
A nameless northern lights show in Ylläs, Finland.
Heikki Holstila, Flickr // CC BY-ND 2.0

While all northern lights are spectacular, they’re not all spectacular in the same way. Aurora borealis, or “northern dawn,” occurs when electrons in the magnetic field surrounding Earth transfer energy to oxygen and nitrogen molecules in the atmosphere. The molecules then emit the excess energy as light particles, which create scintillating displays whose colors and shapes depend on many known and unknown factors [PDF]—type of molecule, amount of energy transferred, location in the magnetosphere, etc.

Though the “storms” are extremely distinct from each other, they haven’t been named in the past the way hurricanes and other storms are christened. That’s now changing, courtesy of a tourism organization called Visit Arctic Europe. As Travel + Leisure reports, the organization will now christen the strongest storms with Nordic names to make it easier to keep track of them.

“There are so many northern lights visible in Arctic Europe from autumn to early spring that we started giving them names the same way other storms are named. This way, they get their own identities and it’s easier to communicate about them,” Visit Arctic Europe’s program director Rauno Posio explained in a statement.

Scientists will be able to reference the names in their studies, much like they do with hurricanes. And if you’re a tourist hoping to check out other people’s footage of the specific sky show you just witnessed, searching by name on social media will likely turn up better results than a broad “#auroraborealis.”

Visit Arctic Europe has already given names to recent northern lights storms, including Freya, after the Norse goddess of love, beauty, and fertility, and Sampo, after “the miracle machine and magic mill in the Finnish national epic poem, ‘Kalevala.’” A few other monikers pay tribute to some of the organization’s resident “aurora hunters.”

But you don’t have to be a goddess or an aurora hunter in order to get in on the action. Anybody can submit a name (along with an optional explanation for your suggestion) through the “Naming Auroras” page here. It’s probably safe to assume that submissions related to Nordic history or culture have a better chance of being chosen, but there’s technically nothing to stop you from asking Visit Arctic Europe to name a northern lights show after your dog.

[h/t Travel + Leisure]