Water Technology / Treatment

  • Simple solution for removing arsenic from water

    Almost 100 million people in developing countries are exposed to dangerously high levels of arsenic in their drinking water, unable to afford complex purification technology; scientists developed a simple, inexpensive method for removing arsenic based on chopped up pieces of ordinary plastic beverage bottles coated with a nutrient found in many foods and dietary supplements

  • Wastewater recycling adds to greenhouse gas emissions

    New research shows that wastewater recycling processes may generate more greenhouse gases than traditional water-treatment processes; still, there are good reasons to continue keep wastewater recycling among the water-resource tools for urban areas

  • Thermopower waves advance a new energy future

    Thermopower waves in thermoelectric materials can convert heat from solid fuels into electrical energy, in research that advances the vision of “smartdust” and other truly autonomous micro and nanomachines; “smartdust” systems are micro-electromechanical systems that are networked wirelessly for sensing and receiving data, for example testing pH of soil in large agricultural fields or quality of water reserves

  • Bacteria--Energy Producers of the Future?

    A lot of the water we use daily goes to waste — whether it goes down drains, sewers, or toilets, much of it ends up at a wastewater treatment plant where it undergoes rigorous cleaning before it flows back to the environment; researchers are looking at processes which would turn wastewater into energy

  • Tap water in Copenhagen contaminated with E.coli

    Parts of the Danish capital Copenhagen were without clean drinking water Saturday after high levels of the E.coli bacteria were detected in the municipal tap water system

  • Cleaning water while generating energy

    A fuel cell system that can generate electricity from organic compounds and clean up wastewater at the same time has been developed by scientists in China; the cell uses light energy to degrade organic compounds in wastewater, generating electrons that pass through to the cathode, which converts the chemical energy into electrical energy

  • Towing icebergs to provide fresh water for parched regions

    A third of the world’s population — more than two billion people — lives without access to clean drinking water, and studies show that the situation will only get worse; a French innovator has an idea: towing icebergs from the Greenland and Antarctica to regions most in need of fresh water; a computer simulation shows this solution to be viable and affordable

  • Solar-based method to provide safe water

    A revolutionary low-cost technique that uses sunshine to provide safe drinking water; solar disinfection (SODIS) of drinking water is an effective way of preventing water-borne diseases such as cholera, dysentery or polio — especially important in developing countries, where safe drinking water is often a precious rarity

  • New desalination technology to help solve world's water shortage

    Over one-third of the world’s population already lives in areas struggling to keep up with the demand for fresh water. By 2025, that number will nearly double; a new study argues that seawater desalination should play an important role in helping combat worldwide fresh water shortages once conservation, reuse, and other methods have been exhausted

  • New device identifies unknown liquids instantly

    Materials scientists and applied physicists have invented a new device that can instantly identify an unknown liquid; the 3D-nanostructured chip offers a litmus test for surface tension (and doubles as a carrier for secret messages); the researchers are currently developing more precisely calibrated chips and conducting field tests with government partners for applications in quality assurance and contaminant identification

  • Water purification unit generates its own energy

    A new biological water purification facility developed by Siemens generates enough methane gas to power its own operations; it also produces much less sludge than conventional systems; the test facility is mlocated in Singapore, and the city state is building a much larger pilot facility — one that will process 300 times more effluent than its predecessor, or about as much sewage water as is produced by around 1,000 people

  • Nanotechnology to help purify water

    Among many potential applications, carbon nanotubes are great candidate materials for cleaning polluted water; many water pollutants have very high affinity for carbon nanotubes and pollutants could be removed from contaminated water by filters made of this nanomaterial — for example, water soluble drugs which can hardly be separated from water by activated carbon

  • Majority of water in Mumbai unsafe to drink

    In May 2011 researchers found that one in ten water samples collected in locations across Mumbai, India were unsafe to drink; in some areas 40 percent of the samples collected were contaminated; most alarming was the fact that thirty-six of the water samples tested positive for E.coli bacteria; the local water utility has refused to acknowledge the problem

  • New tool predicts drought

    Knowing when to instigate water saving measures in dry times will be easier from now on, following a breakthrough in drought prediction: an Australian researcher has developed a way to predict droughts six months before they begin

  • Virtual water would not remedy global fresh water shortage

    More than 80 percent of humanity currently lives in regions where water security is threatened, meaning that as the global population grows against a finite volume of freshwater, a more equal distribution of water use between countries will be needed; virtual water — that is, the amount of water it takes to produce goods or a service — has been suggested as a possible solution to this growing problem by using virtual water values to inform international trade deals; a new study suggests that it may not be as revolutionary as first thought