| Accession number;01A0562916 |
| Title;Chemical Investigation of the Natural Environment in the Tannan region-1999. Relationship between Fumic Acid and the Force of Ion Exchange Adsorption of River Sediment. |
| Author;KOIZUMI SADAYUKI(Fukui Natl. Coll. of Technol.) TAKAYAMA KATSUMI(Fukui Natl. Coll. of Technol.) |
Journal Title;Research Reports of Fukui Technical College, Natural Science and Engineering
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Journal Code:G0597A
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ISSN:0386-3352
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VOL.;NO.34;PAGE.19-29(2000)
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| Figure&Table&Reference;FIG.10, TBL.4, REF.38 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;The characterization on the river waters and the river sediments was investigated and discussed. The ecological effects of cations in river water are closely related to the distribution between solid and liquid phases of the river sediment. River sediments consist of heterogeneous mixtures of organic and inorganic substances, and the binding mechanisums for cations vary with the composition of the sediment. In order to assess the reactivity of the binding forms of cations in river sediment, the following eluent solutions for the river sediments have been applied; 1.0 mol/l nitric acid, 0.1 mol/l EDTA 2Na solution as chelating agent or 3 mol/l hydroxylamine hydrochloride as reducing agent. The organic matter contents in the river sediments were estimated by the ignition loss at 600.DEG.C. and potassium dichromate oxidation method. Fumic acid in river sediments were extracted with NaOH solution. The concentration of carboxyl group in the fumic acid taken were determined by IR spectrometry. On the other hand, after shaking the sediments and the exchange solution containing Zn2+ or Cu2+ at pH 4.2, both the saturated amounts of ion exchange capacities and the exchange adsorption coefficients of sediments were calculated by determining the equilibrium concentration of Zn2+ (or Cu2+) and the initial concentration before shaking. It is evident from the present results that the amounts of exchangable cations in the river sediments strongly related to the organic content in them, fumic acids contained in river sediment affect the eqilibrium of cations between the liquid and solid phases of the sediment, and the concentration of carboxyl group in the river sediment correlated with the saturated amounts of ion exchange capacity for Cu2+. (author abst.) |
