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Cactus Gum Can Purify Water Cheaply and Effectively
Posted By Ariel Schwartz On April 27, 2010 @ 2:45 pm In Design,Design for Health,Environment,humanitarian design,Water Issues | 2 Comments
Counterintuitive as it may seem, cacti  might be the key to cheap and easy water  purification. Assistant Professor Norma Alcantar at the University of South Florida  in Tampa has discovered that when mucilage (a type of gum used to store water) from the prickly pear cactus is mixed with water that contains high levels of sediment or the bacterium Bacillus cereus, both the bacteria and the sediment sink to the bottom. The mucilage, in other words, acts as a cheap and effective natural filter, which could be employed by millions of people in developing nations to produce clean water.
Photo by Vince Alongi 
The discovery means that residents of the developing world could potentially boil cactus and add it to water  that needs to be purified. Of course, it will be difficult for cactus users to gauge how much bacteria and sediment has been filtered. And its hard to say how much water and land would be necessary to grow cacti for widespread water purification. But we love the idea of being able to swap out the Brita for a cactus.
Via New Scientist 
Lead photo by Flakeparadigm
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URL to article: http://inhabitat.com/cactus-gum-can-purify-water-cheaply-and-effectively/
URLs in this post:
 cacti: http://www.inhabitat.com/2009/10/22/biooctanic-giant-cactus-shaped-biofuel-crop-production-towers/
 water: http://www.inhabitat.com/2009/07/09/australian-town-bans-bottled-water/
 University of South Florida: http://usfweb3.usf.edu/absolutenm/templates/?a=928&z=41l
 Vince Alongi: http://www.flickr.com/photos/vincealongi/2372914016/
 water: http://www.inhabitat.com/2010/04/12/mit-researchers-harness-viruses-to-split-water/
 New Scientist: http://www.newscientist.com/article/mg20627576.100-cactus-gum-could-make-clean-water-cheap-for-millions.html?DCMP=OTC-rss&nsref=online-news
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