Letter | Published:

Flocculation of Suspended Sediment in the Sea

Naturevolume 246pages348350 (1973) | Download Citation



INORGANIC sediment suspended in the sea is unstable as single mineral particles and occurs as flocculated aggregates with settling speeds many times greater than that of the constituent grains. This has been demonstrated both through observations of natural samples1–5 and through laboratory experiments6,7. In near-shore waters with high concentrations of terrestrially derived mineral matter the transport and deposition of fine sediment are greatly affected by flocculation. The exact mechanism of floc formation in the sea is not well understood. The concentration, mineralogy and grain size of the suspended particles and the salinity, turbulence and temperature of the water are commonly regarded as controlling factors8,9. Flocculated aggregates composed largely of organic matter have been observed in the sea10,11 and organic matter may be an important ingredient in the flocculation of inorganic sediment.

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  1. 1

    Berthois, L., Revue Géogr. phys. Géol. dyn., 4, 1, 39 (1961).

  2. 2

    Biddle, P., and Miles, J. H., Sediment. Geol., 7, 23 (1972).

  3. 3

    Krone, R. B., Flume Studies of the Transport of Sediment in Estuarial Shoaling Processes (Hydraulic Engineering Laboratory and Sanitary Engineering Research Laboratory, University of California, Berkeley, 1962).

  4. 4

    Schubel, J. R., Powder Technol., 6, 9 (1972).

  5. 5

    Sheldon, R. W., Limnol. Oceanogr., 13, 72 (1968).

  6. 6

    Gripenberg, Stina, Fennia, 60, 3 (1934).

  7. 7

    Whitehouse, V. G., Jeffrey, L. M., and Debrecht, J. D., Proc. Seventh natn. Conf. Clays and Clay Minerals (National Academy of Sciences—National Research Council, 1 - 76, 1960).

  8. 8

    Committee on Tidal Hydraulics, Corps of Engineers, U.S. Army. Tech. Bull., 4 (1960).

  9. 9

    Whitehouse, V. G., and Jeffrey, L. M., Symp. Tidal Hydraulics, New York (United States Army Corps of Engineers Committee on Tidal Hydraulics, Report, 1954).

  10. 10

    Riley, G. A., Limnol. Oceanogr., 8, 372 (1963).

  11. 11

    Gordon, D. C., Deep-Sea Res., 17, 175 (1970).

  12. 12

    Sheldon, R. W., and Parson, T. R., A Practical Manual on the Use of the Coulter Counter in Marine Sciences (Coulter Electronics, Toronto, 1967).

  13. 13

    Sheldon, R. W., and Parsons, T. R., J. Fish. Res. Bd Can., 24, 909 (1967).

  14. 14

    Hjulstrom, R., in Recent Marine Sediments (edit. by Trask, P. D.), 5–31 (American Association of Petroleum Geologists, Tulsa, 1939).

  15. 15

    Hahn, H. H., and Stumm, W., Am. J. Sci., 268, 354 (1970).

  16. 16

    Packham, R. F., J. appl. Chem., 12, 556 (1962).

  17. 17

    Van Olphen, H., An Introduction to Clay Colloid Chemistry (Interscience, New York, 1966).

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  1. Atlantic Oceanographic Laboratory, Bedford Institute of Oceanography, Dartmouth, Nova Scotia



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