Filters
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Back in 2020 we told you about the QuenchSea, a foot-pump-powered portable device for desalinating sea water. Well, its makers are back with the QuenchSea Reel, which uses deep-ocean water pressure to do the same job.
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There’s no debate that microplastics present an ever-increasing ecological and health threat, but given their size, they're incredibly hard to remove from water. Now, some scientists believe sound waves and microfluidic technology may hold the key.
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In countries such as India, a great deal of toxic dye waste from the textile industry is released into waterways, harming people and the environment. A new wood-derived filtration media could remove much of that dye from wastewater streams.
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Microplastics are a growing environmental problem, but now researchers in Korea have developed a new water purification system that can filter out these tiny fragments, as well as other pollutants, very quickly and with high efficiency.
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As microplastics pollution and potable water scarcity both worsen, it's becoming increasingly important to find efficient ways of filtering and desalinating seawater. A new aerogel definitely holds some promise, and it's made from egg whites.
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Engineers at the University of Vienna have developed a new composite material that makes an efficient filter for removing organic pollutants from water. The system uses super-porous “nano-sponges” embedded on a sheet of graphene.
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When cooking oil is extracted from peanuts and sunflower seeds, a waste product known as oilseed meal is left behind. New research shows that proteins harvested from that meal can be used to filter heavy metals out of contaminated water.
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A new type of desalination membrane uses a series of nanoscale tubes lined with a Teflon-inspired material that repels salts while allowing water to flow through with little friction. The team says it's fast, and requires little pressure and energy.
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There are many parts of the world in which fresh water may be plentiful, but it's also full of harmful microbes. An experimental new filter is able to purify such water for drinking, and it's powered solely by sunlight.
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Lead-contaminated tap water is still a problem in much of the world, where conventional lead removal filters may be too expensive for most households. An inexpensive new filter could help – and it was designed by a group of high school students.
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While certain types of filtration media are great at removing pathogens from water, they do clog up over time, slowing their rate of filtration. According to new research, a solution to the problem may lie in the use of "living filtration membranes."
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Engineers at Dartmouth College have developed a new crystal structure that can stretch to twice its size when it encounters a specific chemical. The team says that the material could be used to selectively absorb impurities in water.
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