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[求助]
帮忙翻译一下，本人英语水平有限，谢谢了，附有图片
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For the disposal of high-level waste (HLW) in a deep geological formation as Boom Clay, safety assessment studies have shown that long lived 79Se is one of the more critical fission products. Therefore, the knowledge of its migration properties (diffusion, retention) through the geological barrier (Boom Clay) is of paramount importance. The migration behaviour of selenium strongly depends on its speciation. Under reducing conditions, selenide would be the dominant species and selenium migration would mainly be controlled by the low solubility of Se(II)-bearing minerals. However Se species are often found in redox disequilibrium and more oxidized species might also coexist. Therefore, the study of selenate migration requires attention, as it might be the most mobile selenium species in the host rock. Electromigration experiments performed with a 75Se labeled selenate in Boom Clay indicate a high mobility for this species. The apparent diffusion coefficient (Dapp) of selenate in Boom Clay is estimated from electromigration experiments performed under different electric fields. Using two independent approaches, the value of Dapp for selenate is shown to fall in the range from 1.7×10-11 to 6.12×10-11m2s-1.Moreover, no reduction of selenate in Boom Clay was observed. Keywords: Electromigration; Diffusion coefficients; Selenium; Speciation; Boom clay; Radioactive waste  ~4693GI~RXHY(V~9ENJYVB8.jpg |
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cmds1907
铁杆木虫 (著名写手)
- 翻译EPI: 73
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转身丶忘不掉: 金币+5, 翻译EPI+1, ★★★★★最佳答案 2014-08-29 23:19:10
转身丶忘不掉: 金币+5, 翻译EPI+1, ★★★★★最佳答案 2014-08-29 23:19:10
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对一个地下深处的地质建造（如Boom粘土）中的高放射性核废料(HLW)的处置而言，安全评价研究表明，寿命长79 Se是更关键的裂变产物之一。因此，有关经地质屏障(Boom粘土)迁移特性(扩散、保留)的知识是至为重要的。硒的迁移行为很大程度上取决于其物种形成。在还原条件下，硒化物将是优势物种，硒的迁移主要会由低溶解度的含矿物质的Se(II)控制。然而Se物种通常发现在氧化还原不均衡，而更多的和氧化物种也可能共存。因此，硒酸盐迁移的研究必须引起注意，因为大多数移动硒物种它可能是在母岩中。Boom粘土上75 Se标记的硒酸盐的电迁移实验表明，这个物种具有高迁移率。Boom粘土上硒酸盐的表观扩散系数(Dapp)评价自不同电场下所进行的电迁移实验。使用两个独立的方法，证明了硒酸盐的Dapp值落在1.7×10-11到6.12×10-11m2s-1范围内。此外，观测到Boom粘土上硒酸盐没有还原。 关键词: 电迁移；扩散系数；硒；物种（形成）；Boom粘土；放射性废物 |
2楼2014-08-29 22:58:02
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