Y. Tanizaki et al., USE OF AN ULTRAFILTRATION AND GAMMA-RAY IRRADIATION TECHNIQUE FOR STUDYING THE SPECIATION OF TRACE-ELEMENTS IN RIVER WATERS, Journal of environmental science and health. Part A: Environmental science and engineering, 31(4), 1996, pp. 913-940
The physicochemical forms of 38 elements in several river waters were
measured by size fractionation combined with a gamma (gamma)-ray irrad
iation technique and a neutron activation analysis. The gamma-ray irra
diation technique was effectively utilized to decompose organic materi
als in the river waters and made it possible to estimate the physicoch
emical forms of trace elements. The dissolved species for alkali and a
lkaline earth elements, Al, V, Mn, Sb and Au were present mainly as si
mple inorganic ions in the river waters. The dissolved species of Sc,
Cr, Co, Ni, Zn, Se, Ho, Tm, Yb, and Lu predominantly existed as solubl
e organic complexes, even though significant amounts of Cr, Co, Ni, Zn
, and Se were also present as simple ions. The dissolved species of Fe
, Ag, La, Ce, Sm, and Eu, on the other hand, were chiefly associated w
ith organic colloids.