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转身丶忘不掉

铜虫 (小有名气)

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5. Conclusions
The fate of selenium in Boom Clay is strongly dependent on its chemical speciation. Se(+VI) is not easily reduced but migrates unretarded through the clay, at least, at short time scales. Electromigration allowed us to rapidly estimate the apparent diffusion coefficient of selenate in the Boom Clay using two independent approaches. The results given by both methods differ by about a factor three, so that we consider the range 1.7×10-11–6.3×10-11m2s-1 as confidence range for the apparent diffusion coefficient of selenate in Boom Clay. This range is not unreasonably large because we must keep in mind that each experiment is performed on a different Boom Clay sample, and thus, the natural variation of the host rock plays a nonnegligible role in the output of such experiments.

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真强必胜: 金币+2, good 2014-09-09 11:39:32
转身丶忘不掉: 金币+8, ★★★★★最佳答案 2014-09-09 16:18:05
5.结论
硒在Boom粘土的结局(命运)在很大程度上取决于它的化学形态。硒(+ VI)不容易被还原,但在通过粘土时,至少在短时间范围内其迁移并不延迟。利用电迁移我们能够根据两种独立的手段快速估算硒酸盐在Boom粘土中的表观扩散系数。用这两种方法得到的结果约相差3倍,因此我们认为,硒酸盐在Boom粘土中的表观扩散系数的可信区间为1.7×10-11至6.3×10-11m2s-1。这个范围并非的大不合理,因为我们必须记住,每个实验是用不同Boom粘土样品进行的,因此,主岩的自然变化在这种实验的结论中扮演着不可忽视的作用。
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