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Careful sample preparation, electron tomography and quantitative analysis of 3D models provides unique insights into the inner structure of reverse osmosis membranes widely used for salt water desalination wastewater recycling and home use, according to a team of chemical engineers.

These reverse osmosis membranes are layers of material with an active aromatic polyamide layer that allows molecules through, but screens out 99 to 99.9 percent of the salt.

“As water stresses continue to grow, better membrane filtration are needed to enhance water recovery, prevent fouling, and extend filtration module lifetimes while maintaining reasonable costs to ensure accessibility throughout the world,” said Enrique Gomez, professor of chemical engineering, Penn State. “Knowing what the material looks like on the inside, and understanding how this microstructure affects water transport properties, is crucial to designing next-generation membranes with longer operational lifetimes that can function under a diverse set of conditions.”

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Electric drones booked through smartphones pick people up from office rooftops, shortening travel time by hours, reducing the need for parking and clearing smog from the air.

This vision of the future is driving the Japanese government’s “flying car” project. Major carrier All Nippon Airways, electronics company NEC Corp. and more than a dozen other companies and academic experts hope to have a road map for the plan ready by the year’s end.

“This is such a totally new sector Japan has a good chance for not falling behind,” said Fumiaki Ebihara, the government official in charge of the project.

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The east coast is currently flooded. Why don’t we have pipelines for pumping water around the country where it is needed? We do it for oil and gas, and you know if it leaks it would not be a toxic mess.

Deputy Prime Minister Michael McCormack last week suggested the government would look at changing the law to allow water to be taken from the environment and given to farmers struggling with the drought.

This is a bad idea for several reasons. First, the needs in dry years as well as wet ones. Second, unilaterally intervening in the way water is distributed between users undermines the water market, which is now worth billions of dollars. And, third, in dry years the environment gets a smaller allocation too, so there simply isn’t enough water to make this worthwhile.

In fact, the growing political pressure being put on environmental water holders to sell their water to farmers is exactly the kind of interference that bodies such as the Commonwealth Environmental Water Holder were established to avoid.

Continue reading “Giving environmental water to drought-stricken farmers sounds straightforward, but it’s a bad idea” | >

Dr. Willem-Jan Renger, head of the Innovation Studio at HKU University of the Arts Utrecht, is driving citizen engagement in smart city planning using methods generally seen in computer game creation, as part of an international consortium of cities, IRIS.

Why do we need to engage citizens in urban planning?

The most important thing to know [when planning a city] is what do citizens want
 What do they need? If we start talking to people, they bring key concerns that they have on their level to the table. One such concern in Utrecht was there’s some street racing going on and some nasty incidents. When we were dealing with issues that the citizens had put forward, traffic safety was something we considered combining with smart street lighting solutions by creating some clever combinations to help pedestrians to cross the street, for example, or give cars feedback on the basis of their driving.

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Disruptive solutions that are poised to change the world — a special report produced by Scientific American in collaboration with the World Economic Forum.

Scientific American is the essential guide to the most awe-inspiring advances in science and technology, explaining how they change our understanding of the world and shape our lives.

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