Los Vengadores de la química.
Muy curioso y educativo vídeo sobre cómo de grande es un átomo.
Aunque esté en inglés es perfectamente entendible ya que hace comparaciones entre cosas cotidianas. Interesante hasta el final.
The blue planet’s toxic new colours
1. Tissue slurry — Ontario, Canada This man-made lake in Terrace Bay, Ontario, Canada, is more than 500 metres long. It’s an aeration pond, part of the waste-treatment system at a factory that produces pulp for Kimberly-Clark tissues. “The treated water is returned to its source — often a river,” says Fair. Each yellow cone is an “agitator” that aerates and churns the liquid, assisting its breakdown. According to Worldwatch Institute figures, if recycled paper was used instead, 64 per cent less energy would be needed.and churns the liquid, assisting its breakdown. According to Worldwatch Institute figures, if recycled paper was used instead, 64 per cent less energy would be needed.
2. Fertiliser — Louisiana, US This emerald-tinted lake near Geismar, Louisiana, includes gypsum, uranium and radium. These chemicals result from manufacturing phosphorous fertiliser and are dumped into this impoundment to solidify. The world’s supplies of phosphates are dwindling and most are located in the US, China and Morocco. Unlike oil, however, there is no known renewable alternative for making fertiliser. “You think the resource crisis is in oil?” says Fair. “Think again.”
3. Spilled oil — Gulf of Mexico, US Fair captured this shot over the BP Deepwater Horizon spill at the Macondo well in June 2010, when 750m litres of oil leaked into the Gulf. “The stuff that was coming out of that well was all different colours,” says Fair. “We think of crude oil as being black — it’s all kinds of different colours and consistencies.” The bright red is the crude on the surface, reflecting light. The less viscous oil below the surface is purple-brown.
4. Liquid sulphur — Alberta, Canada At Fort McMurray in Alberta, Canada, a blood-red vein of liquid sulphur is pumped on to a bed of solidified yellow sulphur. The element is one of the major by-products of tar-sand upgrading and there is now an abundance of stocks globally. With prices low, producer Syncrude isn’t selling — it’s storing it in giant pyramids. Liquid sulphur, at around 200°C (its melting point is 115°C), is pumped into fenced-off compounds and left to harden.
5. Aluminium sludge — Louisiana, US This slurry pit is where the solid and liquid by-products of aluminium manufacture are separated. The process involves refining bauxite ore, which produces alumina. The waste includes bauxite impurities, heavy metals and sodium hydroxide (one of the chemicals used during processing). Fair estimates that the red-brown sludge has a pH of about 13, “meaning if you touch it, it burns the skin off”.
6. Fertiliser slurry — Louisiana, US This wintry-looking scene is a mix of lead, ammonia, mercury and ethanol — by-products of phosphate fertiliser production. “It’s a giant lake of waste,” says Fair, who shot the image 80km west of New Orleans in 2005. Owned by Mosaic Fertilizers, the plant, called Uncle Sam, has violated the US Clean Water Act nine times. The slurry pit is less than 3km from the banks of the Mississippi.
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Vale, este chiste es malo pero tiene su LOL.
Puente de Hidrógeno para los de la LOGSE.
