Set HomePage - Favorites
HOT: down Sports
<-- AD960X90 -->0.0
Location: Home > METALS >

Your old phone is full of untapped precious metals

2017-06-16 08:48 [METALS] Source:Netword
Guide:There’s gold, platinum and other valuable materials in every phone – the hard part is getting it out.

align="center">World-changing ideas summit

Upcoming event

The World-Changing Ideas Summit

This story is part of a series inspired by the subjects and speakers appearing at BBC Future’s World-Changing Ideas Summit in Sydney on 15 November. Find out more about the inspiring people coming to the meeting, including:

Researcher Veena Sahajwalla on recycling “microfactories”

BBC TV presenter Michael Mosley on the science of food and health

Uber’s Kevin Corti on the hidden patterns of city transport

Researcher and TV presenter Emma Johnston on the impact of cities on oceans

Experimental architect Rachel Armstrong on interstellar travel

Astronauts Ron Garan and Andrew Thomas

+ many more

A diamond-encrusted iPhone can set you back $95m – but if this piece of i-bling is a little out of your price range, don’t feel despondent. Every smartphone contains precious metals including gold, silver, copper, platinum and palladium.

This is more than just an amusing detail about the device that never leaves your side. These precious metals are now looking more precious than ever, as we face the prospect of one day being no longer able to afford to dig them out of the ground. Suddenly your smartphone is looking a lot more valuable than you might think.

The hidden value of the metals inside our old electronics, and how we might best extract those materials is one of the topics that will be discussed at BBC Future’s World Changing Ideas Summit in Sydney in November.

WHAT EXACTLY IS IN MY SMARTPHONE?

Smartphones are pocket-sized vaults of precious metals and rare earths. A typical iPhone is estimated to house around 0.034g of gold, 0.34g of silver, 0.015g of palladium and less than one-thousandth of a gram of platinum. It also contains the less valuable but still significant aluminium (25g) and copper (around 15g).

View image of (Credit: Getty Images)


One tonne of iPhones would deliver 300 times more gold than a tonne of gold ore and 6.5 times more silver than a tonne of silver ore

And that’s just the start. Smartphones also contain a range of rare earth elements – elements that are actually plentiful in the Earth’s crust but extremely difficult to mine and extract economically – including yttrium, lanthanum, terbium, neodymium, gadolinium and praseodymium.

Then there’s also the plastic, the glass, the battery… it’s a very long list of ingredients.

These are all present in relatively small amounts. But more than two billion people currently have a smartphone, and that number is projected to increase. What’s more, the concentration of some of these elements, such as gold and silver in a mobile phone is actually much higher than their concentration in an equivalent weight of ore. One tonne of iPhones would deliver 300 times more gold than a tonne of gold ore and 6.5 times more silver than a tonne of silver ore.

WHY IS THIS A PROBLEM?

Because those two billion smartphone users upgrade to a New phone roughly every 11 months, which means their old smartphone gets cast into a drawer somewhere and forgotten about, or it gets thrown out. Barely 10% of these get recycled and their precious components recovered and reused. It’s a veritable goldmine sitting in cupboards, in boxes, in landfill. In an era when the prefix ‘peak’ is starting to be added to a whole lot of resources as well as oil, it makes economic and environmental sense to avoiding wasting such valuable substances.

WHAT HAPPENS TO THESE RESOURCES WHEN A SMARTPHONE BECOMES OBSOLETE?

In case you’re thinking of trying a little electronic gold mining at the individual scale, the miniscule amounts in each smartphone should make you think twice. But once you start thinking at the big scale, it looks a lot more attractive: one million mobile phones could deliver nearly 16 tonnes of copper, 350kg of silver, 34kg of gold and 15kg of palladium.

The challenge is how to recover those minerals and materials safely and economically. A significant proportion of e-waste – including mobile phones – gets exported or dumped in countries such as China where poorly paid workers and children are reported to be used to break apart these electronics, often using dangerous chemicals to get to the valuable components. One town in south-eastern China called Guiyu has claimed the dubious distinction of being the largest e-waste site in the world. It’s causing terrible health problems for its residents and polluting the soil, rivers and air with mercury, arsenic, chromium and lead.

Even e-waste that is recycled in its country of origin poses a challenge. In Australia, for example, recycling of e-waste still involves industrial smelting which is high cost and far from environmentally-benign.

View image of (Credit: Getty Images)

THERE MUST BE A BETTER WAY?

(EDIT:admin)

<-- AD690X200 -->
Recommend
<-- AD250X250 -->
<-- AD250X250 -->
<-- AD960X78 -->