Slashdot Mirror
The Explosive Problem With Recycling Phones, Tablets and Other Gadgets: They Literally Catch Fire. (washingtonpost.com)
What happens to gadgets when you're done with them? Too often, they explode. From a report: Around the world, garbage trucks and recycling centers are going up in flames. The root of the problem: volatile lithium-ion batteries sealed inside our favorite electronics from Apple, Samsung, Microsoft and more. They're not only dangerous but also difficult to take apart -- making e-waste less profitable, and contributing to a growing recycling crisis. These days, rechargeable lithium-ion batteries are in smartphones, tablets, laptops, ear buds, toys, power tools, scooters, hoverboards and e-cigarettes. For all their benefits at making our devices slim, powerful and easy to recharge, lithium-ion batteries have some big costs. They contain Cobalt, often mined in inhumane circumstances in places like the Congo. And when crushed, punctured, ripped or dropped, lithium-ion batteries can produce what the industry euphemistically calls a "thermal event." It happens because these batteries short circuit when the super-thin separator between their positive and negative parts gets breached.
Old devices end up in trouble when we throw them in the trash, stick them in the recycling bin, or even responsibly bring them to an e-waste center. There isn't official data on these fires, but the anecdotal evidence is stark. Since the spring of 2018 alone, batteries have been suspected as the cause of recycling fires in New York, Arizona, Florida, Wisconsin, Indiana, Idaho, Scotland, Australia and New Zealand. In California, a recent survey of waste management facilities found 83 percent had at least one fire over the last two years, of which 40 percent were caused by lithium-ion batteries.
Old devices end up in trouble when we throw them in the trash, stick them in the recycling bin, or even responsibly bring them to an e-waste center. There isn't official data on these fires, but the anecdotal evidence is stark. Since the spring of 2018 alone, batteries have been suspected as the cause of recycling fires in New York, Arizona, Florida, Wisconsin, Indiana, Idaho, Scotland, Australia and New Zealand. In California, a recent survey of waste management facilities found 83 percent had at least one fire over the last two years, of which 40 percent were caused by lithium-ion batteries.
Because those old batteries were zinc and manganese oxide, neither of which is particularly valuable, and the electrolyte was potassium hydroxide, which is neither particularly valuable nor particularly flammable.
You could get some modest heat out of a semi-discharged 9V battery or, given enough time, some mild, acid-base reactions, but there's no high redox potential, flammable electrolyte glory to get a real bonfire going.
Same thing with lead acid batteries, except for the nastiness of dissolved lead contaminating groundwater and strong acids that will burn flesh.
NiCad are similar to the lead acid batteries. Heavy metal contamination problem, but no substantial ability to go up in a pyre.