Created a graphene filter, able to cleanse even sea water
The Australian team of scientists from the Commonwealth Scientific and Industrial Research Organization (the CSIRO) introduced a cheap water filtration method (even the sea) on the basis of a form of graphite - the material, known as GraphAir.
of the material production technology was presented by Australian researchers about a year ago. In contrast to conventional graphite, which is obtained by energy intensive chemical process, GraphAir made from soybean oil, inexpensive and renewable material from which scientists can obtain graphene thin film.
This "soy graphene film" has a microscopic nanochannels. During the cleaning liquid passes through them and cleaned of contaminants. Scientists report that their material is able to filter out 100 percent contained in the liquid salt, as well as other contamination of domestic origin.
Test the effectiveness of its GraphAir-filter CSIRO experts decided at Sydney Cove, purified water sample taken from her. To this end, they have established a regular film GraphAir membrane water filter, which can be found in any store of the relevant goods. Only one filtering procedure was enough to make water available for drinking.
"The technology allows a single step to obtain clean drinking water no matter how polluted it was originally", - says head of research Dong Han Seo.
In addition, it was found that the graphene film is polluted slowly. Typically, the membrane is installed in conventional filters, losing 50 percent of its efficiency after 72 hours. With material GraphAir this problem has been solved, as researchers report in the journal Nature Communications.
Australian researchers say the technology does not require large expenditures.
"All you need - this heat, we have developed graphene membrane filter and a small water pump," - says Seo.
Implementation of the first field trials of technology in developing countries is planned for 2019. In addition, the scientists want to develop a purification system for home use, as well as for industrial urban filtering systems. The researchers add that the developed technology can be adapted for filtration and desalination of water by industrial waste. The researchers note that there are about 2, 1 billion people lack access to clean drinking water. Their development can help all these people.
"Nearly a third of the world's population, about 2, 1 billion people have no access to clean drinking water. As a result, millions of people around the world, and most often it is the children, die every year from diseases associated with lack of adequate water supply, sanitation and hygiene, "- says Seo.
"GraphAir represents an ideal filter for water purification. Instead of complex, time-consuming and multiphase processes that are currently used for cleaning, it is able to cope with the task in just a single step. "