A defense contractor better known for building jet fighters and lethal missiles says it has found a way to slash the amount of energy needed to remove salt from seawater, potentially making it vastly cheaper to produce clean water at a time when scarcity has become a global security issue.
The process, officials and engineers at Lockheed Martin Corp say, would enable filter manufacturers to produce thin carbon membranes with regular holes about a nanometer in size that are large enough to allow water to pass through but small enough to block the molecules of salt in seawater. A nanometer is a billionth of a meter.
Because the sheets of pure carbon known as graphene are so thin – just one atom in thickness – it takes much less energy to push the seawater through the filter with the force required to separate the salt from the water, they said.
Text by David Alexander. Via Reuters
Motoi Yamamoto: Salt seems to possess a close relation with human life beyond time and space. Moreover, especially in Japan, it is indispensable in the death culture. After my sister’s death, what I began to do in order to accept this reality was examine how death was dealt with in the present social realm. I posed several related themes for myself such as brain death or terminal medical care and picked related materials accordingly. I then came to choose salt as a material for my work. This was when I started to focus on death customs in Japan. In the beginning, I was interested in the fact that salt is used in funerals or in its subtle transparency. But gradually I came to a point where the salt in my work might have been a part of some creature and supported their lives. Now I believe that salt enfolds the memory of lives. I have thus had a special feeling since I started using it as a material. Text via http://www.motoi.biz/
It is so named for its pink waters, caused by Dunaliella salina in the water. The color is particularly visible during the dry season. The lake is also known for its high salt content, which, like that of the Dead Sea, allows people to float easily. The lake also has a small salt collecting industry and is often the finishing point of the Dakar Rally.
Many salt collectors work 6–7 hours a day in the lake, which has a salt content close to 40%. In order to protect their skin, they rub their skin with “Beurre de Karité” (shea butter, produced from shea nuts obtained from the Shea nut tree), which is an emollient used to avoid tissue damage.
This lake was used on a task of the Amazing Race 6 in which teams had to collect salt in a basket from the bottom of the lake floor.
Text via Wiki