Stories tagged water

Get the ark ready

by mdr on Jun. 22nd, 2014

Minnehaha Falls: Recent heavy rains have made the Minneapolis attraction even more attractive.
Minnehaha Falls: Recent heavy rains have made the Minneapolis attraction even more attractive.Courtesy Mark Ryan
The effects of the recent spells of hard rain will still be felt this week as flood conditions persist in Minnesota. The old single day record for rainfall at the Minneapolis-St. Paul Airport was shattered last Thursday (June 19, 2014) when 4.13 inches fell. On a personal level, we've never had water in our basement in the 20 we've lived in our Minneapolis home until after last Thursday's deluge. The seemingly constant rainfall has prompted me to make several trips to one of Minneapolis's favorite landmarks: Minnehaha Falls. Normally a tame, relative trickle during the summer season, it has been a roaring torrent of late, making it quite the spectacle to see and hear. And if just the sight of it doesn't blow your hair back, you can do like this Tennessee wild man and go over the falls in a kayak! But that's just crazy - and dangerous - so I'm not really suggesting you do it. Plus it's probably illegal. Local rivers will continue to rise for the next several days so who knows what it will look like later this week.

SOURCE
Star Tribune story

This is something you don't see everyday: a plethora of life existing in a single drop of seawater, magnified 25 times, and captured by photographer David Littschwager. Another reason not to swallow the ocean.

Curious of what sort of creatures appear in the photo? Go here for an explanation.

We have lots of cool, clear water on our planet. But ever think about how it first got here? The folks at MinuteEarth have been thinking about that.

See video

Nov
19
2013

Blue Jeans closeup.jpg: Blue Jeans closeup
Blue Jeans closeup.jpg: Blue Jeans closeupCourtesy Wikimedia Commons - author: Mark Michaelis

During the textile manufacturing process, excess dyes are sometimes discharged as wastewater resulting in water pollution downstream. In recent years, particular attention has focused on water pollution in China resulting from indigo dyes used to create the distinctive blue color of denim blue jeans.

Some nanoscientists are looking at ways to help remove potentially harmful dyes chemicals from water.

Scientists at Colombia’s Universidad Industrial de Santander and Cornell University have come up with a cheap and simple process using natural fibers embedded with nano particles to quickly remove dye from water.

The research takes advantage of nano-sized cavities found in cellulose; plant fibers can be immersed in a solution of sodium permanganate and then treated with ultrasound causing manganese oxide molecules grow in the tiny cellulose cavities. The treated fibers are able to quickly break down and remove the dye from the water.

More about this topic:

  • Cornell University study on fibers and dyes visit:
    http://www.news.cornell.edu/stories/2013/09/treated-fibers-clean-dye-pol...
  • GreenPeace report "Toxic Threads" visit:
    http://www.greenpeace.org/international/en/publications/Campaign-reports...
  • Popular Science article on indigo dye and water pollutionvisit:
    http://www.popsci.com/blog-network/techtiles/problem-indigo?src=SOC&dom=fb
  • China's famed Pearl River under denim threat
    http://www.cnn.com/2010/WORLD/asiapcf/04/26/china.denim.water.pollution/
  • To learn more about nanotechnology, science, and engineering, visit:
    www.whatisnano.org

    To see other nano stories on Science Buzz tagged #nano visit:
    http://www.sciencebuzz.org/buzz_tags/nano

    Sep
    28
    2013

    A lake carrier heads out on Lake Superior from Duluth: As with the world's oceans, researchers have now detected plastic pollution in all the Great Lakes.
    A lake carrier heads out on Lake Superior from Duluth: As with the world's oceans, researchers have now detected plastic pollution in all the Great Lakes.Courtesy Mark Ryan
    Over the past couple years, Science Buzz has posted several stories (here and here) about the humongous patches of garbage and plastic debris found floating in the world's oceans. It's a serious problem and one that should raise red flags for anyone concerned with the Earth's environment. But even more troubling is the recent news that plastic particles have now been found in all five of the Great Lakes lining the border of the USA and Canada. Unlike the large globs of plastic clogging areas of the ocean, the plastics polluting the Great Lakes are microscopic particles detectable only in a microscope. But they're no less disturbing.

    A team of researchers led by Dr. Sherri “Sam” Mason, professor of chemistry at SUNY-Fredonia has been gathering water samples and reported finding high concentrations of plastic particles in the chain of freshwater lakes. One of the researchers involved is environmental chemist Lorena Rios-Mendoza from University of Wisconsin-Superior. Both she and Mason have studied the Great Trash Island (aka Trashlantis) in the Pacific Ocean but has now turned their attention to the Great Lakes.

    Most of the plastic found in the water is visible only under a microscope, but has been found in all five of the Great Lakes, both in the water column, and in lake sediment. The amount of micro-plastic varies between lakes with Lake Erie - the shallowest and smallest by water volume - containing the largest ratio and Lake Superior - the largest and most voluminous - a much smaller ratio. But it doesn't matter; the point is that we're polluting some of our important sources of fresh water with plastic.

    It's thought that cosmetics with could one of the sources, since the industry relies heavily on using micro-beads in its products. These tiny plastic particles used on our faces, skin, and teeth, eventually get washed off into the water supply where they're too small to get filtered out. But cosmetics certainly aren't the only source. Plastic refuse obliterates the shoreline in Haiti
    Plastic refuse obliterates the shoreline in HaitiCourtesy tedxgp2
    Think of the ungodly amount of plastic material we use and discard every year. Surprisingly, only about five percent of the bags, bottles, cups, electronics, etc. get recycled; most plastic trash ends up in landfills where it slowly degrades and eventually finds its way into the world's favorite garbage dump: the oceans.

    “We have no idea how long some of these plastics stay in the ocean, could be more than 40 years,” Rios-Mendoza said. She also worries if organic toxins in the water can attach themselves to the tiny plastic particles, and end up in the food chain. In this regard, Rios-Mendoza has been sampling Great Lake fish to see if such toxic particles are present in their guts.

    It's important to remember that only 3 percent of the world's water is freshwater and the five Great Lakes - Superior, Huron, Michigan, Ontario, and Erie - together contain 20 percent of that freshwater. That's a large portion of a relatively scarce and essential life ingredient. Last fall, I posted an interesting graphic that illustrates nicely Earth's total water supply versus fresh water and puts things in perspective.

    Lake Superior: Plastic pollutants have now invaded the upper Great Lake.
    Lake Superior: Plastic pollutants have now invaded the upper Great Lake.Courtesy Mark Ryan
    Rios-Mendoza and Mason have been collaborating with a research and education group called 5Gyres Institute that monitors and studies garbage patches found in five subtropical gyres in the world's oceans. Rio-Mendoza presented a preliminary study of their work on the Great Lakes at a recent meeting of the American Chemical Society. The team's future studies involve pinpointing the sources of plastic pollution and acquiring a better understanding of how plastics degrade in the environment.

    "We all need to become aware of how much plastic we use in our lives and avoid using single-use products. Don’t buy water in plastic bottles or cosmetic products with micro beads. Bring re-usable bags to the store with you. Simple things like this make a big difference, but it’s also important to keep talking about this issue and raising awareness about how it affects the Great Lakes and the world’s oceans.” --- Dr. Sherri Mason“

    By the way, here in Minnesota, and situated at the western tip of Lake Superior, the city of Duluth was recently proclaimed to have the best tasting drinking water in the state. By best-tasting, I'm assuming they mean it has no taste whatsoever since water is described as a colorless, tasteless liquid. Whatever the case, I always thought Duluth's drinking water was the best while growing up there (my grandparents lived in a Twin Cities' suburb and I never liked the taste of their softener-treated water).
    In another water-related story, it's estimated that life on Earth can survive for at least another 1.75 billion years until we move out of the habitable zone and our oceans (and other water sources) will evaporate in the increased heat. So it's probably best that we take care of what water we have - it needs to sustain us for a long time.

    SOURCE and LINKS
    National Geographic story
    Red Orbit story
    The World's Largest Dump
    The Great Pacific garbage patch
    Star Tribune story on Duluth's water

    Signs of Curiosity's work at the Rocknest site: Soil samples taken and analyzed from this site have been found to contain Martian water.
    Signs of Curiosity's work at the Rocknest site: Soil samples taken and analyzed from this site have been found to contain Martian water.Courtesy NASA/JPL-Caltech/MSSS
    After last week's disappointing news that no signs of current life have been found living on Mars, NASA scientists have just confirmed some pretty exciting news: the Mars rover, Curiosity, has found water on the Red Planet. Analysis of dirt and fine soil scooped up from the Rocknest site on the surface of Mars has revealed that it contains water. This is big news. Read here what NASA has to say about it.

    Water proves to be the best solvent for nanomachines
    Water proves to be the best solvent for nanomachinesCourtesy Welome Images
    Researchers from the University of Amsterdam have found that nanomachines work more efficiently when water is added as a "lubricant". Nanomachines are structures just one molecule in size (a few dozen atoms or so) that do work. When researchers added a small amount of water to the solvent that surrounded the nanomachines, the machines moved much faster.

    Discovering how to optimize these tiny machines is important for the development of things like molecular computers and surfaces that can change properties.

    Earth's water: Most of it is saline and undrinkable. A lot of the fresh water is underground or locked in polar and glacial ice.
    Earth's water: Most of it is saline and undrinkable. A lot of the fresh water is underground or locked in polar and glacial ice.Courtesy US Geological Survey
    This cool graphic from the USGS Water Science School website gives you a really good idea of just how much water there is on Earth. Compared to the Earth itself, it doesn't look like much. The large blue globe represents the volume of all the water present on Earth, i.e. in the oceans, lakes, icecaps, atmosphere etc. The next size is the volume of the all fresh water - much of which is located underground. Don't overlook the very tiny blue globe positioned beneath the mid-sized water globe and just northwest of Florida in the graphic. That's how much fresh water is contained in all the lakes and rivers on Earth - the sources of life's drinking water. Feeling thirsty now?

    Jul
    20
    2012

    Bone dry: Significant sections of the country are facing drought just weeks after the major weather stories were about heavy rains and flooding. What's going on?
    Bone dry: Significant sections of the country are facing drought just weeks after the major weather stories were about heavy rains and flooding. What's going on?Courtesy Tomas Castelazo
    It was just a few weeks ago we posted incredible pictures and video of devastating floods ripping through Duluth. Now, on a national scale, the weather story is drought. But how bad is it really?

    Depends on where you live, but much of the Midwest is falling into drought conditions. It's bad, but not as wide spread as the peak of U.S. drought conditions from 1934. USA Today has an interesting toggle map that allows you compare today's conditions with that record drought.

    Even earlier this summer, heavy rains in the Twin Cities had lockmasters along the Mississippi River shutting their gates to control fast-flowing river water. Now downstream, the Mississippi is approaching record-level lows. In some areas around Memphis, the river level has fallen 55 feet from highs set last summer. This CNN website report has interesting satellite images of the newly slimmed Mississippi compared to last year's look.

    What do you think of this crazy weather? Share your thoughts here with other Buzz readers.

    I've been checking out some of the visual material taken of yesterday's massive flooding in Duluth and thought this one was pretty interesting. The video of the raging Miller Creek in Lincoln Park was taken while it was still raining and you see can visible change in the water level by the end of it.