animal charcoal

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an·i·mal char·coal

charcoal produced by incomplete combustion of animal tissues, especially bone.
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These results show that the bone char preferentially adsorbs cadmium ions due to a higher affinity between [Cd.
The experimental equilibrium data demonstrated that cadmium is preferentially retained by the bone char.
Therefore, residual bone char proved to be an acceptable adsorbent in the studied system, obtaining satisfactory values of removal capacity, thus it can be used as an alternative process for zinc and cadmium removal.
Sorption of cadmium, copper, and zinc ions onto bone char using Crank diffusion model.
Hundreds of years ago, sugar refiners discovered that bone char from cattle worked well as a whitening filter, and this practice is now the industry standard.
Bone char filtering is never used in beet sugar processing.
A bone char filter acts like a crude filter and is most often used first in cane sugar refining.
The bone char is not as good at removing impurities such as inorganic ions, so after being put through bone char, sugar may be passed through activated charcoal or an ion exchange system as well.
Connie Hunter, Consumer Relations Specialist for Domino Sugar and the C&H Sugar Company, said the bones used to make bone char come from "non-European cattle.
The other major company that sells bone char to the sugar industry is the American Charcoal Company, which was started in 2002 and is located in Wyoming.
Paul Caulkins, the Corporate Quality Assurance Manager of Imperial/Savannah Foods, said that little bone char can be obtained from a single cow "since only the dense bones of the animal, such as the pelvic bones, can be used.
Sugar companies purchase large quantities of bone char for several reasons, the first being the sheer size of their operations.