Bone charcoal

Dye adsorption from solution may be used to estimate the surface area of a powdered solid. Suppose that if 3.0 g of a bone charcoal is equilibrated with 100 ml of initially 10 Af methylene blue, the final dye concentration is 0.3 x 10 Af, while if 6.0 g of bone charcoal had been used, the final concentration would have been 0.1 x Qr M. Assuming that the dye adsorption obeys the Langmuir equation, calculate the specific surface area of the bone charcoal in square meters per gram. Assume that the molecular area of methylene blue is 197 A. ... 

Charcoal is generally satisfactorily activated by heating gently to red heat in a crucible or quartz beaker in a muffle furnace, finally allowing to cool under an inert atmosphere in a desiccator. Good commercial activated charcoal is made from wood, e.g. Norit (from Birch wood), Darco and Nuchar. If the cost is important then the cheaper animal charcoal (bone charcoal) can be used. However, this charcoal contains calcium phosphate and other calcium salts and cannot be used with acidic materials. In this case the charcoal is boiled with dilute hydrochloric acid (1 1 by volume) for 2-3h, diluted with distilled water and filtered through a fine grade paper on a Buchner flask, washed with distilled water until the filtrate is almost neutral, and dried first in air then in a vacuum, and activated as above. To improve the porosity, charcoal columns are usually prepared in admixture with diatomaceous earth. 

Adsorbate Bone charcoal Sugar charcoal activated ... 

Bone charcoal or activated wood charcoal is a convenient accelerator, combination occurring instantly. If the vessel in which the reaction is carried out is cooled to 30° C., the sulphuryl chloride is condensed and may be drained away as rapidly as it is formed.8 The terpene... 

Defluoridation processes can be classified into four main groups Adsorption methods, in these methods sorbents such as bone charcoal, activated alumina and clay are used in column or batch systems. Ion-exchange methods, these methods require expensive commercial ion-exchange resins. Coprecipitation and... 

Particles of colloidal size may be removed by boiling the liquid with a little bone charcoal and subsequent filtration. 

PROP Product of destructive distillation of bones in preparation of bone charcoal containing nitrogenous compounds such as pyridine, aniline, methylamine, and pyrrole (27ZTAP 3,25,69). 

Granular carbon bone charcoal ion exchange resin... 

Dateable materials are the organic matters that includes pollen, bone, charcoal, shell and many animal products and remains. There are a number of assumptions that go into dating and are best left to experts in the field to take into account when trying to determine a 14C date for any material. 

Bone bixk Bone charcoal Charcoal, bone Cl 77267 EINECS 232-421-2 Pigment black 9. 

Anhydrid kyseliny tetrahydroftalove 3723 Animal bone charcoal 684... 

Dahbi S, Azzi M, Saib N, De La Guardia M, Faure R and Durand R (2002) Removal oftriva-lent chromium from tannery waste waters using bone charcoal. Anal Bioanal Chem 374 540-546. 

Bone char Bone charcoal. See Bone black... 

Synonyms Bone char Bone charcoal Pigment black 9... 

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