Application of the dynamic light scattering for assessing the content of large colloidal and suspended particles in river waters

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Abstract

The value of the scattering intensity in the dynamic light scattering (DLS) method is proportional to the mass concentration of polymethylmethacrylate (PMMA) particles in water suspensions containing 1–100 mg/l of particles with a size of 0.08-2.0 μm determined gravimetrically, confirms this possibility. A significant correlation between the intensity of scattering of DLS in filtrates and the concentration of chemical elements Fe, Al, Ti, Th, and REEs in them, which are prone to migration in the coarse colloidal forms, is another proof of the dependence of the intensity of DLS filtrates on the content of large colloids in them. This makes it possible to characterize the initial concentration of large colloids and their losses during the clogging of filters, as well as to assess the role of large colloids in the balance of chemical elements in river waters.

About the authors

V. M. Shulkin

Pacific Geographical Institute Far Eastern Branch Russian Academy of Sciences

Author for correspondence.
Email: shulkin@tigdvo.ru
Vladivostok, Russia

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