Water:

Scientists are finding ways to harness energy and recover metals from wastewater

The average American uses a staggering 60 gallons of water per day for purposes that include flushing toilets, showering and doing laundry. This figure can easily double if outdoor uses, such as watering lawns and filling swimming pools, are also included. Most of that water eventually will become wastewater that must be treated before it can be discharged into nature, which requires a lot of energy. Now scientists are starting to realize that instead of using energy to treat wastewater, it’s possible to actually gain energy from wastewater. In fact, wastewater can contain more than three times the amount of…

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  • GreenBiz
  • Date:04/03/2019

A step-guide to solving the global water crisis

For many people, a clean drink of water isn’t a certainty. Right now an estimated 1.2 billion people live in areas with chronic water scarcity, and upwards of 4 billion — two-thirds of the world’s population — experience shortages at least one month a year. As bad as this sounds though, it’s not an unsolvable problem, according to a new book by Edward B. Barbier, a scholar in environmental sustainability. The author explains that our approach to solving water shortages with drastic measures in the moment of crisis isn’t a cost-effective strategy and won’t solve our long-term problems. Instead, he argues, we…

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  • The Revelator
  • Date:03/12/2019

The waste product of desalination plants could be used to desalinate more water

When salt is removed from seawater in desalination plants, the byproduct is – not surprisingly – a lot of highly-concentrated salty brine. Ordinarily, this is just dumped back into the sea, which can harm the environment. Thanks to researchers at MIT, however, that brine could soon be used to desalinate more water. What the researchers have created is a system that removes the unwanted compounds from the brine and turns into useful chemicals such as sodium hydroxide. The reason this chemical is important is that it’s commonly utilized to change the acidity of seawater entering desalination plants, which in turn…

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  • New Atlas
  • Date:02/18/2019

Seawater turns into freshwater through solar energy: A new low-cost technology

A study conducted at Politecnico di Torino and published by the journal Nature Sustainability promotes an innovative and low-cost technology to turn seawater into drinking water, thanks to the use of solar energy alone.

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  • EurekaAlert!
  • Date:01/08/2019

Seawater to freshwater through solar energy: A new low-cost technology

According to FAO estimates, by 2025 nearly 2 billion people may not have enough drinking water to satisfy their daily needs. One of the possible solutions to this problem is desalination, namely treating seawater to make it drinkable.

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  • Date:12/19/2018

A water treatment breakthrough, inspired by a sea creature

Inspired by Actinia, a sea organism that ensnares its prey with its tentacles, a team of researchers has developed a method for efficiently treating water. The research, a collaboration of the labs of Yale's Menachem Elimelech and Huazhang Zhao of Peking University, used a material known as a nano coagulant to rid water of contaminants.

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  • Date:11/29/2018

Carbon neutral solution for desalination: Tapping into geothermal sources

Water shortages are hitting some areas of the world hard, and with increasing global temperatures, more regions may be experiencing drought conditions. Countries such as Saudi Arabia rely on desalination plants to provide drinking water to their residents, producing 5 million cubic meters of desalinated water per day.

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  • Date:11/12/2018

An ingenious way to bring clean water to a slum

Gangs control the water supply in much of Nairobi's Kibera slum. This is how one man used an innovative idea to take them on and bring clean water to the residents.

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  • Date:10/16/2018

How recycled water could revolutionize sustainable development

By 2025, absolute water scarcity will be a daily reality for an estimated 1.8 billion people.

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  • Date:09/26/2018

This metal material quickly removes pollutants from water at little cost

Scientists in Australia have come up with a cheap metal alloy capable of stripping impurities from contaminated water. The metal can latch onto impurities and greatly hasten the process of removing pollutants from water at a fraction of the cost of existing approaches. The new invention could have great implications for industries such as textile production and mining.

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  • New Atlas
  • Date:09/20/2018
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