Abstract
An experimental investigation is presented of the foam separation of colloidal ferric oxide over the pH range 3 to 12 by using an anionic and a cationic surfactant. A sol containing 1.67 mmole/ liter (93 mg/liter) of trivalent iron can be reduced in concentration to 0.09 mmole/liter by 0.17 mmole/liter dodecyl sodium sulfate (anionic) over pH 4.5 to 8; and to 0.18 mmole/liter by 0.17 mmole/liter ethylhexadecyldimethylammonium bromide (cationic) over pH 10 to 12. Soluble iron species produce poorer separations. Between pH 8 and pH 10 the charge of the colloid is reversed from positive to negative, and for an efficient separation a two-step process should be used, first with an anionic surfactant and then with a cationic. The charge of the particulates has little effect on the foam separation of the surfactants although the presence of the particulates has a significant effect, as evidenced by residual surfactant concentrations and collapsed foam volumes.
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Grieves, R. B., and D. Bhattacharyya, JAOCS42, 174–176 (1965).
Grieves, R. B., and D. Bhattacharyya, JAOCS43, 529–531 (1966).
Sutherland, K. I., and I. W. Wark, “Principles of Flotation,” Australasian Institute of Mining and Metallurgy, Melbourne, Australia, 1955.
Gaudin, A. M., “Flotation,” McGraw-Hill Book Company Inc., New York, N. Y., 1957.
Hutchinson, G. E., “A Treatise on Limnology,” Vol. I, Wiley and Sons, Inc., New York, N. Y., 1957.
Kusnezow, S. I., “Mikro-organismen im Stoffkreislauf der Seen,” Deutscher Verlag der Wissenschaften, Ost-Berlin, 1959.
Stumm, W., and G. F. Lee, Schweizerische Zeitschrift für Hydrologie22, 295–319 (1960).
Clanton, B. R., Textile Research8, 301–304 (1938).
Shveikina, R. V., and S. G. Mokrushin, Zhur. Priklad. Khim.31, 1109–1111 (1958).
Grieves, R. B., and D. Bhattacharyya, Nature207, 476–478 (1965).
Grieves, R. B., and D. Bhattacharyya, Canad. J. Chem. Eng.43, 286–289 (1965).
Grieves, R. B., C. J. Crandall and D. Bhattacharyya, J. Appl. Chem. (Br), in press.
Rubin, A. J., J. D. Johnson and J. C. Lamb, Ind. Eng. Chem. Process Design Develop.5, 368–375 (1966).
Rubin, A. J., and J. D. Johnson, Anal. Chem.39, 298–302 (1967).
Sorum, C., J. Am. Chem. Soc.50, 1263–1267 (1928).
Cross, J. T., Analyst90, 315–324 (1965).
“Standard Methods,” 11th Edition, American Public Health Association, New York, N. Y., 1961, pp. 140–143.
Parks, G. A., and P. L. de Bruyn, J. Phys. Chem.66, 967–973 (1962).
Onoda, G. Y., and P. L. de Bruyn, Surface Science4, 48–63 (1966).
Troelstra, S. A., and H. R. Kruyt, Kolloid-Z.101, 182–189 (1942).
Hazel, F., and G. H. Ayres, J. Phys. Chem.35, 2930–2942 (1931).
Grieves, R. B., and D. Bhattacharyya, A.I.Ch.E. Journal11, 274–279 (1965).
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Grieves, R.B., Bhattacharyya, D. The foam separation of colloidal ferric oxide with an anionic and a cationic surfactant. J Am Oil Chem Soc 44, 498–501 (1967). https://doi.org/10.1007/BF02908546
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DOI: https://doi.org/10.1007/BF02908546