News tagged with heavy metals
World's first magnetic soap produced
Scientists from the University of Bristol have developed a soap, composed of iron rich salts dissolved in water, that responds to a magnetic field when placed in solution. The soap's magnetic properties were ...
Jan 23, 2012 |
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Novel device removes heavy metals from water
An unfortunate consequence of many industrial and manufacturing practices, from textile factories to metalworking operations, is the release of heavy metals in waterways. Those metals can remain for decades, even centuries, ...
Dec 16, 2011 |
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World's most efficient flexible OLED on plastic created
(PhysOrg.com) -- Engineering researchers at the University of Toronto have developed the world's most efficient organic light-emitting diodes (OLEDs) on plastic. This result enables a flexible form factor, not to mention ...
Oct 31, 2011 |
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Electron switch between molecules points way to new high-powered organic batteries
The development of new organic batteries -- lightweight energy storage devices that work without the need for toxic heavy metals -- has a brighter future now that chemists have discovered a new way to pass ...
Sep 15, 2010 |
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Bees helping to monitor air quality at German airports
(PhysOrg.com) -- Air quality around eight airports in Germany is being monitored with the help of bees, whose honey is tested regularly for toxins.
Jul 01, 2010 |
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Researcher uses bacteria to make radioactive metals inert
The Lost Orphan Mine below the Grand Canyon hasn't produced uranium since the 1960s, but radioactive residue still contaminates the area. Cleaning the region takes an expensive process that is only done in ...
Sep 08, 2009 |
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Researchers identify mysterious life forms in the extreme deep sea (w/ video)
(PhysOrg.com) -- A summer research expedition organized by scientists at Scripps Institution of Oceanography at UC San Diego has led to the identification of gigantic amoebas at one of the deepest locations ...
Space & Earth / Earth Sciences
Oct 23, 2011 |
4.7 / 5 (23) |
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Edible carbon dioxide sponge
(PhysOrg.com) -- A year ago Northwestern University chemists published their recipe for a new class of nanostructures made of sugar, salt and alcohol. Now, the same team has discovered the edible compounds ...
Sep 23, 2011 |
3 / 5 (3) |
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New material shows promise for trapping pollutants
(PhysOrg.com) -- Water softening techniques are very effective for removing minerals such as calcium and magnesium, which occur as positively-charged ions in "hard" water. But many heavy metals and other inorganic ...
Sep 06, 2011 |
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New sensor promises rapid detection of dangerous heavy metal levels in humans
UC researchers have developed the first lab-on-a-chip sensor to provide fast feedback regarding levels of the heavy metal manganese in humans. The sensor is both environmentally and child friendly, and will ...
Aug 01, 2011 |
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New organic catalyst should enhance drug research and development
A new "organocatalyst" developed at Oregon State University is now available for commercial use. Produced by an Albany, Ore., pharmaceutical company, it should make new drug development around the world less ...
May 11, 2011 |
5 / 5 (2) |
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How microbes take out the trash
(PhysOrg.com) -- The molecular machinery bacteria use to rid themselves of toxic substances including antimicrobial drugs has been studied in detail by a UA-led team of researchers. A better understanding ...
May 10, 2011 |
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Fukushima: Sea contamination likely to be local - scientists
Radioactive contamination of the sea from Fukushima is likely to be only a local problem, but could lead to an exclusion zone if there is a major release of long-term pollutants, scientists say.
Mar 29, 2011 |
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Pollution forms an invisible barrier for marine life
Over 50 percent of the population in the United States and over 60 percent in the world live in coastal areas. Rapidly growing human populations near the ocean have massively altered coastal water ecosystems.
Mar 10, 2011 |
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Swimming microbes monitor water quality
Miners used to rely on canaries to alert them to dangerous build-ups of gases. Now much smaller animals -- the smallest of all -- can warn of toxins in water supplies.
Chemistry / Analytical Chemistry
Feb 16, 2011 |
4.5 / 5 (2) |
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Heavy metal (chemistry)
A heavy metal is a member of an ill-defined subset of elements that exhibit metallic properties, which would mainly include the transition metals, some metalloids, lanthanides, and actinides. Many different definitions have been proposed—some based on density, some on atomic number or atomic weight, and some on chemical properties or toxicity. The term heavy metal has been called "meaningless and misleading" in an IUPAC technical report due to the contradictory definitions and its lack of a "coherent scientific basis". There is an alternative term toxic metal, for which no consensus of exact definition exists either. As discussed below, depending on context, heavy metal can include elements lighter than carbon and can exclude some of the heaviest metals. Heavy metals occur naturally in the ecosystem with large variations in concentration. Nowadays anthropogenic sources of heavy metals, i.e. pollution, have been introduced to the ecosystem. Waste derived fuels are especially prone to contain heavy metals so they should be a central concern in a consideration of their use.
For more information about Heavy metal (chemistry), read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
