Double Acid-Base Extraction of Silicic Acid from Quartz Sand
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چکیده
منابع مشابه
Silicic acid regeneration from estuarine sediment cores*
The release of silicic acid from sediments is known to play a n important role in determining the silicic acid concentration in the water columns of estuaries, but factors controlling the rate of release are poorly understood. Silicic acid efflux from sandy Chesapeake Bay sediment cores that were maintained in the dark was strongly dependent on biogenic silica deposition, temperature and salini...
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Although silicon is a constituent of normal animal tissues, silicic acid formed by the dissolution of inhaled quartz particles can induce the formation of pathological lesions in which the normal tissue is replaced by fibrotic tissue arranged concentrically around the silica particles. The mechanism of the change which constitutes the disease, silicosis, is unknown. Schulman & Rideal (1937) dem...
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THE presence of silica in blood, and the much larger amounts sometimes found in urine, indicate that silica is appreciably soluble in body fluids. The determination of such solubility, however, is a matter of considerable difficulty and different results have been obtained by various workers, owing to the operation of such variable factors as particle size, concentration of suspension, method o...
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OF the several colorimetric methods which have been described for the estimation of small amounts of silica, probably that of Dienert and Wandenbulche [1923] has met with most favour. The principle of this method is the production of a yellow silicomolybdic acid complex; it was first studied by Schreiner [1903] and Lincoln and Barker [1904]. Winkler [1914] used a similar method for studying the...
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ژورنال
عنوان ژورنال: Journal of Minerals and Materials Characterization and Engineering
سال: 2017
ISSN: 2327-4077,2327-4085
DOI: 10.4236/jmmce.2017.56030