Characterization of individual particles in water samples from the Fuji and Sagami Rivers, central Japan by SEM-EDX

概要

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The selective enrichment behaviors of labile substances such as hydroxides to the surface of specificmineral particles in river water were clarified by scanning electron microscopy/energy dispersive X-ray microanalysis (SEM-EDX). Individual prarticles with particle size between 0.45 and 10μm other than diatom in water samples from the Fuji and Sagami rivers, central Japan were analyzed by SEM-EDX and classified into seventeen groups according to the chemical composition and the shape. Phosphorus, sulfur, chlorine, manganese and copper detected in each particle could be used successfully in order to elucidate the insoluble components secondary formed in river water, because the detection frequencies of such elements are usually quite low or negligible in fresh mineral particles derived from igneous rocks. Almost all parts of manganese detected in individual particles are ones adsorbed afresh as the hydroxides together with iron and aluminum. Anions such as phosphorus, sulfur and chlorin form the complexes with the hydroxides and/or are incorporated in them. The detection frequencies of such labile species were predominantly high in Mg and/or Ca rich aluminosilicates.
信州大学の論文
2004-02-28