Chemical Speciations of Heavy Metals in Water of the Novosibirsk Reservoir: An Estimate of Their Bioavailability and Potential Ecological Danger to Plankton
G. A. LEONOVA1, A. A. BOGUSH1, V. A. BOBROV1, T. M. BULYCHEVA2, YU. I. MALIKOV1, G. N. ANOSHIN1, ZH. O. BADMAEVA1, S. V. PALESSKIY1, N. V. ANDROSOVA1, L. B. TROFIMOVA1 AND V. N. IL’INA1
1Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences,
Pr. Akademika Koptyuga 3, Novosibirsk 630090 (Russia)
E-mail: leonova@uiggm.nsc.ru
2Verkhneob Regional Hydroeconomics,
Ul. Geroev truda 19, Novosibirsk 630055 (Russia)
Pages: 429-441
Abstract
Using WATEQ4F computer code, chemical speciations of coexistence of heavy metals in superficial waters of the Novosibirsk reservoir have been calculated. Although the code allows one to calculate only complexes of metals with inorganic ligands, conclusions of a general character have been drawn on the bioavailability and potential ecological danger of particular chemical speciations of metals in a specific water body. Based on the large evidence of long-term monitoring studies, enrichment of living matter, particularly the plankton, by certain metals has been revealed, the metals being available in the water of the Novosibirsk reservoir in the most mobile and consequently the most available forms, namely, free non-complex ions and hydroxo and carbonate complexes. Peculiar features of microelemental composition of the plankton of the Novosibirsk reservoir as compared to that of the bottom silt are its enrichment by P, Br, Cd, Ca, Zn, Cu, and by Pb to a lesser degree. By and large, the revealed low values of enrichment factors (10
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