Cobalt (Co)
Elements22 Jul 2015

Cobalt (Co)

Cobalt, the metal in magnets and phone batteries, is synonymous with the colour blue. But what exactly are magnets, how do they work and where are they used? And is some of the cobalt being mined by children? Presenter Laurence Knight hears from chemistry professor Andrea Sella of University College London why a permanent magnet is like a flock of birds, and he travels to Arnold Magnetics near Sheffield where manager Martin Satyr explains how magnets are used in everything from recovering the heat energy from sportscar engines to recycling your trash. Also in the programme, Mark Dummett of Amnesty International, back from Katanga in southern Congo - source of half the world's cobalt - tells of his concerns about the conditions in which artisanal miners work, including children. And David Weight of the Cobalt Development Institute explains what the industry is doing to ensure it knows where its cobalt is coming from. (Photo: Andrea Sella picking up lumps of cobalt with a magnet; Credit: Laurence Knight)

Denne episoden er hentet fra en åpen RSS-feed og er ikke publisert av Podme. Den kan derfor inneholde annonser.

Episoder(65)

Tin (Sn)

Tin (Sn)

Tin may seem old-fashioned, but it plays some surprisingly important roles in the modern economy. Presenter Justin Rowlatt meets our favourite chemist Andrea Sella of UCL at Pewters' Hall in London to...

18 Jul 201431min

Carbon (C) - materials

Carbon (C) - materials

We all know carbon's role in global warming, but could element 6 also provide some solutions? Carbon fibre composites are making planes more fuel efficient, as Airbus explains. And wonder-material gra...

17 Jul 201427min

Carbon (C) - energy

Carbon (C) - energy

Carbon is a great energy store – in plants and animals, but also as hydrocarbons – coal, oil and natural gas. From the Industrial Revolution onwards, burning these fossil fuels has released vast quant...

16 Jul 201426min

Gold (Au)

Gold (Au)

Heavy and chemically inert, why is gold, of all the elements of the periodic table, so highly valued by mankind? Does it even provide a sound basis for modern currencies? What is it actually useful fo...

15 Jul 201423min

Mercury (Hg)

Mercury (Hg)

Mercury is beautiful, yet deadly poisonous. Known as quicksilver, the Minamata international treaty aims to phase its use out completely. But how will the ban on element 80 affect artisanal gold miner...

14 Jul 201423min

Aluminium (Al)

Aluminium (Al)

Light, strong and flexible, aluminium is used in drinks cans, window frames, aircraft and packaging. Ubiqitous today, why was it valued more highly than gold 150 years ago? Is it better to recycle thi...

13 Jul 201427min

Helium (He)

Helium (He)

The second most abundant element in the universe, helium is rare on Earth. In liquid form it is used as a coolant in super conducting magnets in MRI scanners – so should this rare element be used in s...

12 Jul 201423min

Phosphorus (P)

Phosphorus (P)

Phosphorus is essential for life. Our crops would not grow without phosphate fertiliser. So should we worry that we may be frittering the stuff away? Or that most of the world's remaining reserves are...

11 Jul 201420min

Populært innen Vitenskap

fastlegen
tingenes-tilstand
rss-nysgjerrige-norge
forskningno
rekommandert
sinnsyn
rss-zahid-ali-hjelper-deg
villmarksliv
rss-paradigmepodden
jss
liberal-halvtime
tomprat-med-gunnar-tjomlid
fjellsportpodden
tidlose-historier
kvinnehelsepodden
nevropodden
rss-overskuddsliv
nordnorsk-historie
dekodet-2
aldring-og-helse-podden