The team, led by Professor Jiwoong Yang from the Department of Energy Engineering at DGIST, and in collaboration with the team led by Professor Jungwon Park from the School of Chemical and Biological Engineering at Seoul ...
Nanophysics
Aug 9, 2023
0
1
Cadmium naturally occurs in the soil of much of Latin America's cacao farms, and is absorbed by the plants. With EU regulations restricting the amount of cadmium allowed in chocolate imports, it is important for farmers to ...
Ecology
Aug 2, 2023
0
8
Northwestern University engineers have developed a new sponge that can remove metals—including toxic heavy metals like lead and critical metals like cobalt—from contaminated water, leaving safe, drinkable water behind.
Nanomaterials
May 11, 2023
0
75
Indigenous communities living near oil exploration sites in the Peruvian Amazon have high levels of mercury, cadmium and lead in their bodies. This is the conclusion of a study led by Cristina O'Callaghan Gordo, a researcher ...
Environment
May 3, 2023
0
10
Juan Fernández fur seals are so poorly understood that they were considered extinct for nearly a century before a remnant population which had managed to evade generations of hunters was rediscovered in the 1960s.
Ecology
May 1, 2023
5
71
Cocoa beans can absorb toxic heavy metals such as cadmium from the soil. Some cultivation areas, especially in South America, are polluted with these heavy metals, in some cases considerably. In combining different X-ray ...
Analytical Chemistry
Apr 6, 2023
0
661
When imagining the deep sea, we often think of a cold, dark and empty wasteland, sparsely populated by monstrous-looking creatures of the deep. But in fissures along the seabed, ocean water superheated by the Earth's magma ...
Ecology
Jan 24, 2023
0
25
Nature uses 20 canonical amino acids as building blocks to make proteins, combining their sequences to create complex molecules that perform biological functions.
Bio & Medicine
Dec 12, 2022
0
710
Rice is a staple food for nearly half the world's population. However, it accumulates more cadmium from the soil than other cereals like barley and wheat. Reports estimate that 40–65% of our total intake of cadmium, a toxic ...
Molecular & Computational biology
Aug 30, 2022
0
81
Committed chocoholics, be warned. A health-robbing heavy metal, cadmium, lurks in the velvety recesses of your favorite indulgence.
Ecology
Feb 2, 2022
1
430
Cadmium ( /ˈkædmiəm/ kad-mee-əm) is a chemical element with the symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Similar to zinc, it prefers oxidation state +2 in most of its compounds and similar to mercury it shows a low melting point compared to transition metals. Cadmium and its congeners are not always considered transition metals, in that they do not have partly filled d or f electron shells in the elemental or common oxidation states. The average concentration of cadmium in the Earth's crust is between 0.1 and 0.5 parts per million (ppm). It was discovered in 1817 simultaneously by Stromeyer and Hermann, both in Germany, as an impurity in zinc carbonate.
Cadmium occurs as a minor component in most zinc ores and therefore is a byproduct of zinc production. It was used for a long time as a pigment and for corrosion resistant plating on steel while cadmium compounds were used to stabilize plastic. With the exception of its use in nickel–cadmium batteries and cadmium telluride solar panels, the use of cadmium is generally decreasing in its other applications. These declines have been due to competing technologies, cadmium’s toxicity in certain forms and concentration and resulting regulations. Although cadmium has no known biological function in higher organisms, a cadmium-dependent carbonic anhydrase has been found in marine diatoms.
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