Monday, July 22, 2013
Change the World 3v at a time
Chemists Seek to Desalt the World To achieve desalination, the researchers apply a small voltage (3.0 volts) to a plastic chip filled with seawater. The chip contains a microchannel with two branches. At the junction of the channel an embedded electrode neutralizes some of the chloride ions in seawater to create an “ion depletion zone” that increases the local electric field compared with the rest of the channel. This change in the electric field is sufficient to redirect salts into one branch, allowing desalinated water to pass through the other branch. Inexpensive fresh water from seawater is literally changes the world. Pound sand Malthus.