Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Physicochemical Speciation of Trace Elements in River Water by Size Fractionation
Yoshiyuki TanizakiMasao YamazakiSumiko Nagatsuka
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1984 Volume 57 Issue 6 Pages 1545-1550


Eight kinds of Millipore filters with different pore sizes (8–0.025 μm) were used for the filtration of two water samples taken from the Tama River. The filtrates were analyzed for 31 elements using a neutron activation analysis. Most alkali and alkaline earth elements were distributed in the smallest size fraction (<0.025 μm). The same fractionation pattern was also recognized for As, Se, Mo, Sb, and W, which tend to form oxoanions. But the major transition elements were concentrated in the larger size fractions (>0.45 μm). For the river water sample with higher concentration of total organic carbon, however, most of such elements were found in the smallest size fraction. The solubilities of rare earth elements bacame higher with increasing their ionic potentials.

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