Old LCD Screens Used for Medical Treatment

  • One research team recovered polyvinyl alcohol from the computer screens, which can be used in medicine (Photo courtesy of the National Cancer Institute)

Some researchers want to recycle
a chemical in computer screens to
use it for a medical treatment.
Shawn Allee reports:

Transcript

Some researchers want to recycle
a chemical in computer screens to
use it for a medical treatment.
Shawn Allee reports:

Most LCD computer screens contain toxic mercury. The European Union will soon mandate those screens be recycled rather than thrown away.

There are other metals and chemicals in the LCD screens that are not dangerous.

Dr. Avtar Matharu is with Britain’s University of York.

His research team recovered polyvinyl alcohol from the computer screens.

It’s used in spongy pads that deliver medicine.

“We can take out Polyvinyl alcohol from the front and back of an LCD screen. We can take what effectively would be a waste resource and potentially use it in a medical application.”

Matharu says getting polyvinyl alcohol out of LCD screens is expensive compared to making it from crude oil, but he says it could be another reason to recycle rather than throw them into a landfill.

For The Environment Report, I’m Shawn Allee.

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Mining the Minerals That Power Your Gadgets

  • Molycorp's rare-earth mining pit in Mountain Pass, California. (Photo by Shawn Allee)

Politicians like to show off pictures of wind turbines, hybrid cars, and other green hi-tech.
The idea is to get more of that in America, and maybe even make more of it here. Shawn
Allee found there’s a chance all of this could be complicated by the supply of key green-
tech ingredients:

Transcript

Politicians like to show off pictures of wind turbines, hybrid cars, and other green hi-tech.
The idea is to get more of that in America, and maybe even make more of it here. Shawn
Allee found there’s a chance all of this could be complicated by the supply of key green-
tech ingredients:

I don’t know about you, but there’re a whole bunch of minerals I completely ignored in
high school chemistry.

Jack Lifton knows them by heart.

“… lanthenum, serium, neodymium…”

Lifton’s a market expert on these so-called ‘rare-earth’ minerals. And he says, even if you
haven’t heard of them, you might have them – even in your pocket.

“Without rare earths, we probably would not have portable computers and you
certainly wouldn’t have display screens today on anything – television or computer,
iPod, or iPhone, whatever.”

Rare earths make electronics light and they don’t need much power: just what wind
turbines and electric hybrid cars need.

There’s a problem in the rare-earth market, though. China’s the big supplier, but Lifton
says it might keep it’s rare-earth supplies for itself.

“In the next three or four years, you cannot make a device with a rare earth unless
it’s made in China and then the Chinese have made it very clear that their priorities
are to manufacture goods for their own consumer economy and keep the Chinese
employed.”

So, is the US gonna be left dry when it comes to green high tech? Well, there is a rare
earth mine in America, but it’s had some environmental problems.

The mine is trying to turn that around now.

Honan: “On the left is the overburden stock pile. Once you’ve seen one of those,
you’ve seen them all.”

Allee: “Big pile of rocks.”

Honan: “Big pile of rock.”

Mine manager Scott Honan’s driving me around the top of a mine in the middle of the
California desert.

He manages the mine for Molycorp. Honan’s showing me the mine’s waste water
ponds.

Honan: “Those two are fresh water.”

Allee: “Basically, you’re trying to recycle as much of this water as you can. Why is
that?”

Honan: “We have to confine all of our water activities on the site. We have to be
very efficient when we use water, we can’t afford to waste it.”

Gotta admit, this is not very sexy stuff, but Molycorp is crossing its fingers that
expensive water recycling and treatment investments pay off.

Molycorp uses water to process the rare-earth ore, and back in the 90s, the mining and
processing stopped for a while due to waste water leaks.

It’s desert, after all – and regulators didn’t want what little water there is contaminated by
a slurry of salts and mining byproducts.

Allee: “So where’re we heading, here?”

Honan: “The pit.”

Allee: “Is that what everyone calls it? ‘The Pit?’”

Honan: “Yeah. It’s about 55 acres if you look at the perimeter. From the top of the
high wall over there to the bottom, it’s about 500 feet.”

Honan says Molycorp will expand the mine in a few years – just in time for when China
might stop exporting rare-earths.

The company might be jumping a tad – regulators might clamp down on the operation if
Molycorp repeats some of its past water pollution mistakes.

Still…

“I think a lot of us at the mine have a big stake in the success of this operation going
forward. A lot of us feel it’s important for our country. What we produce here is
going to drive a lot of this energy efficient technology that people are anxious about.
It’s cool to be a part of that.”

And for Honan, what’s even cooler is that someone’s talking about building a wind farm
not too far from his mine.

Honan says it’d be awefully nice if his rare-earths are in those turbines.

For The Environment Report, I’m Shawn Allee.

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