Swedish researchers develop low-cost wood filter to purify water in refugee camps

March 22, 2017 by  
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At least 780 million people in the world lack access to clean water , a dire problem exacerbated by the increasing number of people living in poorly-equipped refugee camps . Researchers from KTH Royal Institute of Technology in Sweden may have come up with a low-cost, low-tech solution: a portable wood filter that doesn’t require a power source to produce clean water. KTH scientists developed a material from wood cellulose that can trap bacteria , and are testing the material for use as a water filter. PhD student Anna Ottenhall said, “Our aim is that we can provide the filter for a portable system that doesn’t need electricity – just gravity – to run raw water through it…The bacteria-trapping material does not leach any toxic chemicals into the water, as many other on-site purification methods do.” Related: Researchers design cheap mercury-free LED foil to purify water https://www.youtube.com/watch?v=1NaJ2zRPleQ The wood cellulose fibers utilized are antibacterial, and are dipped in a positively-charged polymer solution to create the material, which works since bacteria and viruses are negatively charged, according to Phys.org. The harmful viruses and bacteria stick to the material, unable to get free or reproduce, and eventually die. Another benefit of this method of purification is that bacteria won’t be able to build up a resistance to it. The Swedish research team envisions their material used as a water filter in places that lack wells or infrastructure, like refugee camps or in emergencies. After use, the material can simply be burned. Bandages, packaging, and plasters could potentially draw on the material as well to dispose of bacteria in ways that don’t put toxins into the environment . KTH researchers are developing several other wood-based materials along with this wood water filter, such as see-through wood, a wood polystyrene alternative, and squishy wood batteries. Via Phys.org Images via KTH Royal Institute of Technology and Wikimedia Commons

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Swedish researchers develop low-cost wood filter to purify water in refugee camps

MIT researchers discover silk holds the key to vastly improved filtration

July 21, 2016 by  
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MIT and Tufts University researchers found silk is good for more than clothes, cool furniture , or bulletproof vests . They found a way to extract tiny silk building blocks, called nanofibrils, that vastly improve filtration techniques. Others attempted to extract these nanofibers in the past, but largely failed, and the researchers detailed their process to success in a paper published recently in the journal Nano Letters . These nanofibrils can be made into ” advanced filtration membranes ,” according to the researchers. In their paper, the scientists explained their four-step process, which involved exfoliating the silk, extracting nanofibrils via ultrasonic waves, and vacuum filtration. They utilized silk fibers made by domesticated silkworms. Related: Groundbreaking affordable, paper-thin filter removes viruses from water The new membranes are not only more effective for filtration, they’re more environmentally friendly. Used filters biodegrade, resulting in ” no lasting impact ,” according to MIT . The nanofibrils membranes are less expensive too: one piece costs between five and 51 cents, while a comparable piece of commercial membrane costs $1.20. The new membranes are very flexible and don’t dissolve in water, crucial for effective water filtration. The nanofibrils are also ” negatively charged at neutral pH ” which means they can snare positively charged molecules. MIT postdoc student Shengjie Ling said , “There has been a renewed focus recently on developing these types of ultrathin filtration membranes…The challenge has always been to create these new ultrathin and low-cost devices while retaining mechanical strength and good separation performance. Cast silk fibroin membranes aren’t an option, because they do not have porous structure and dissolve in water if not pretreated. We knew there had to be a better way.” The new membranes were designed in a collaboration between several different departments; material scientists and civil, computational, and biomedical engineers all worked together on the research. The new membranes could be used in research, food manufacturing, and to filter water . Via MIT News Images via the MIT/Tufts University researchers and Ed Schipul on Flickr

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MIT researchers discover silk holds the key to vastly improved filtration

Revolutionary new graphene water filters could save millions of lives around the world

March 11, 2016 by  
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Researchers just developed a revolutionary new graphene water filter that could provide fresh drinking water to millions of people around the world. The innovative design filters liquids nine times faster than anything else on the market, and it can capture viruses and bacteria – anything larger than one nanometer (which is roughly 100,000 times smaller than the diameter of a human hair) cannot get through the graphene layer. Read the rest of Revolutionary new graphene water filters could save millions of lives around the world

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Revolutionary new graphene water filters could save millions of lives around the world

New polymer from researchers at Cornell may revolutionize water filtration

January 5, 2016 by  
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Researchers at Cornell University have developed a new polymer technique that may transform the way water is purified around the world. Led by associate professor of chemistry and chemical biology  Will Dichtel , the team has invented a porous version of cyclodextrin, which demonstrates a greatly increased absorption rate, sometimes 200 times greater, over traditional methods. “These materials will remove pollutants in seconds, as the water flows by,” says Dichtel, “so there’s a potential for really low-energy, flow-through water purification, which is a big deal.” Read the rest of New polymer from researchers at Cornell may revolutionize water filtration

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New polymer from researchers at Cornell may revolutionize water filtration

Scientists discover that the melting glaciers are slowing down the Earth’s rotation

January 5, 2016 by  
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Climate change is becoming more and more difficult to ignore and rising sea levels are just one of the visible consequences of these effects. NASA has predicted a one meter rise worldwide in the next few centuries just by gathering sensitive satellite data, yet other scientists are also considering how studying the Earth’s core and the rotational effects of changing sea levels may also serve as predictors. These data can help coastal areas prepare for the future. Read the rest of Scientists discover that the melting glaciers are slowing down the Earth’s rotation

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Scientists discover that the melting glaciers are slowing down the Earth’s rotation

Recycling Water Filters Just Got Fluid

December 3, 2015 by  
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Using a water filter, whether to improve the taste of your water or to filter out contaminants, isn’t that hard to do. What has been difficult, though, is trying to justify throwing out all of the filters into the trash. And, according to The…

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Recycling Water Filters Just Got Fluid

Moringa Oleifera Tree Seed Extracts Purify Water Naturally

December 6, 2013 by  
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Moringa Oliefera tree seeds via Shutterstock A seed extract from the Moringa Oleifera tree could provide a natural and inexpensive solution for water purification . Through a collaborative research project between Uppsala University, Institut Laue-Langevin in France and the NIST Center for Neutron Research in the USA has optimized the process to make the seed extract even better at removing particulates from water. The new research gives improved insight and could now be advanced for use in larger-scale water treatment plants. Read the rest of Moringa Oleifera Tree Seed Extracts Purify Water Naturally Permalink | Add to del.icio.us | digg Post tags: drumstick tree , horseradish tree , Institut Laue-Langevin , moringa , moringa oleifere tree , moringa tree , natural water filtration methods , NIST Center for Neutron Research , seed extract , uppsalla university , water filter , water filtration , water issues , water purification        

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Moringa Oleifera Tree Seed Extracts Purify Water Naturally

WaterBean: Portable Coconut Carbon Filter Lets You Refill Any Bottle With Fresh, Purified Water

July 25, 2013 by  
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The WaterBean is a brilliant portable water filter that can be inserted within any bottle to provide pure, fresh water on the go. The colorful filter is small enough to be conveniently carried anywhere, and it can be used in any reused plastic bottle to purify water from the tap. Each WaterBean can safely filter 280 bottles worth of H2O into clean and pure drinking water . Read the rest of WaterBean: Portable Coconut Carbon Filter Lets You Refill Any Bottle With Fresh, Purified Water Permalink | Add to del.icio.us | digg Post tags: eco design , green design , plastic bottle filter , sustainable design , water filter , WaterBean        

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WaterBean: Portable Coconut Carbon Filter Lets You Refill Any Bottle With Fresh, Purified Water

Floating Pool Could Clean the Water in Prague’s Vltava River

January 11, 2012 by  
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Read the rest of Floating Pool Could Clean the Water in Prague’s Vltava River Permalink | Add to del.icio.us | digg Post tags: + pool , andrea kubna , eco design , Floating Houses , Floating Pool , green design , ondrej libepnsky , plus pool , Prague , recreation , sustainable design , vltava river , water filter , water filtering pool , water issues

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Floating Pool Could Clean the Water in Prague’s Vltava River

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