Related topics: water · pollution

Sea turtles struggle years after unexplained die-off

New research is detailing how environmental stressors, including heavy metals, brought on by human activity are harming coastal green sea turtle populations—work that researchers hope will inform conservation efforts going ...

Honey bees can help monitor pollution in cities

Honey from urban bees can tell us how clean a city is and help pinpoint the sources of environmental pollutants such as lead, new University of British Columbia research has found.

Polymers join forces to deliver

An affordable, heavy metal- and odor-free method for making hollow polymer nanostructures has been designed by A*STAR researchers. These structures could find use as delivery systems for personal care products, drugs and ...

Race on to make urban agriculture viable, durable

In a world faced with the conundrum of mountains of waste and obesity for some and dire shortages and malnutrition for others the future of food is a main dish on today's global menu.

Keeping heavy metals out of beer and wine

A frosty mug of beer or ruby-red glass of wine just wouldn't be the same if the liquid was murky or gritty. That's why producers of alcoholic beverages usually filter them. But in a study appearing in ACS' Journal of Agricultural ...

Researchers track down new biocatalysts

Phosphate is a key element in many processes in the body and essential for global food production. Researchers at the University of Göttingen have now developed a method to detect new enzymes from the environment that can ...

page 1 from 23

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.

This text uses material from Wikipedia, licensed under CC BY-SA