New graphene sieve can remove even small salts from seawater

April 4, 2017 by  
Filed under Green

Comments Off on New graphene sieve can remove even small salts from seawater

Graphene is the world’s strongest material, but that’s not all it can do. The wonder material can also be used as a filter that removes salts from seawater so it’s safe to drink. While scientists have eyed graphene-oxide membranes for better filtration – and even showed graphene could filter out large salts – now 13 University of Manchester scientists developed graphene membranes that can sieve common, smaller salts out of water. It takes small sieves to remove common salts from substances like seawater, and in the past when placed in water graphene-oxide membranes swelled, and weren’t able to catch those smaller salts. The University of Manchester scientists found a way to control the pore size of the graphene to sieve those common small salts out of water. Professor Rahul Nair, one of the scientists part of the research, said the realization of “membranes with uniform pore size down to atomic scale” is a significant step. Related: Affordable new biofoam could revolutionize how developing countries clean water The discovery could open doors to efficient, less expensive desalination technology – which the university points out is crucial as climate change depletes water supply in modern cities. In just around eight years, 14 percent of the world’s population could face water scarcity, according to United Nations estimates, and not all countries can afford large, expensive desalination plants to provide relief to their citizens. The university says the graphene technology pursued by the scientists could revolutionize water filtration around the world, offering an affordable option for developing countries . The researchers think their discovery could be scaled up for wider use. Nair said in a statement, “This is the first clear-cut experiment in this regime. We also demonstrate that there are realistic possibilities to scale up the described approach and mass produce graphene-based membranes with required sieve sizes.” The journal Nature Nanotechnology published the research online yesterday. Via The University of Manchester Images via The University of Manchester and Pixabay

Read more from the original source: 
New graphene sieve can remove even small salts from seawater

The Anarchy of Cheese Made Simple

April 25, 2010 by  
Filed under Eco, Green

Comments Off on The Anarchy of Cheese Made Simple

Image: Chelsea Green Book Review: Cheesemonger by Edgar Gordon Cheesemonger inspires one to become an expert on cheese — or on anything for that matter — with the realization that this goal is achievable with a good dose of humility, curiosity and hard work. And if you already fancy yourself a cheese expert, such as the American who did a two year post-doc at the Sorbonne, this book may prevent you from making an overconfident ass of yourself. Best of all, this book celebrates both old and new wor…

See original here:
The Anarchy of Cheese Made Simple

Bad Behavior has blocked 1283 access attempts in the last 7 days.