| 摘要: |
| 本文报道了1984年黄河口铀分布规律的调查研究结果。首次发现黄河口铀浓度较高,为5—9μgU/L,这在国内外大河流中是少见的。其原因有待于进一步研究。本文主要报道并讨论黄河口铀浓度较高引起的一系列地球化学异常现象。 |
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| THE GEOCHEMICAL ANOMALY OF URANIUM IN THE HUANGHE ESTUARY |
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| Abstract: |
| The paper reports an investigation of the geochemistry of Uranium in the Huanghe estuary in 1984. It is found that the Uranium concentration is anomalous with an average concentration of 5-6μgU/L, which is higher than that in most of the rivers in the world. The cause may be mainly due to the high suspension load of Huanghe. The investigation show: (1) The Uranium concentration appeared the highest in Hemen station of the Huanghe estuary, its cause is explained. (2) The relationship between the salinity and the Uranium concentration is anomalous with an inverse ratio, i.e., the Uranium concentration decrease with the increase of salinity in the Huanghe estuary. (3) The Uranium concentration in suspended materials in the Huanghe estuary is higher than in other estuaries, morever, the minimium value also appeared in Hemen station of the Huanghe estuary, it is rare in the world. (4) The variation of Uranium concentration with reason is not very apparent, on the whole, it is slight low in May than in Augest. The Uranium concentration to the North of the Huanghe estuary in summer is higher than that to the South, but the situation is reversed in winter, this may be due to the surface layer residual current. (5) The Uranium concentration generally is higher in adjacent area of the Huanghe estuary, which may be due to the tide, tidal current, season runoff and wind-wave etc.. (6) The behaviors of physical chemistry of Uranium in the Huanghe estuary is also discussed. The existing speciations of Uranium may be UO2(CO3)34- and UO2(OH)3- complex anion ion. |
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