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echommm

金虫 (小有名气)

[交流] as they migrate through the membranes如何理解?(膜交换)

In ED, alternating anion and cation permeable membranes (called anion transfer and cation transfer membranes) are placed in layers with an anode on one side of the assembly and a cathode on the other.  A membrane permeable to cations only is placed nearest to each of the electrodes.  When a current is applied to the system, channels where the cation transfer membrane is towards the cathode, and the anion transfer membrane towards the anode are depleted of ions, as they migrate through the membranes.  In the adjacent channels, the membranes do not allow migration in the direction the ions are drawn. Thus, alternating channels are formed of deionized product water and ion-rich concentrate stream.
求标红段翻译。

[ Last edited by echommm on 2010-11-5 at 10:37 ]
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petrocatal

木虫 (正式写手)

echommm(金币+5): 2010-11-05 14:22:11
they 是指阳离子与阴离子,上文不是已经说了么,有阳离子膜与阴离子膜,阴阳离子在电极不同作用下,穿过膜,所以在两块膜中央的水就纯化了!
阳离子膜,缺电子depleted of ions。
意译如下:在通道上、相邻的的膜的属性应该保持一致,以保证脱除同一种离子。

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痴迷科研
5楼2010-11-05 14:11:40
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liuxinlin-yj

金虫 (正式写手)

echommm(金币+2, 翻译EPI+1): 2010-11-05 13:26:41
当(随着)他们迁移通过膜
2楼2010-11-05 12:57:42
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liuxinlin-yj

金虫 (正式写手)

echommm(金币+3): 2010-11-05 13:26:48
当给体系施加一个电流,阳离子膜传递向阴极,阴离子你、膜传递向阳极,随着当离子迁移,孔道内离子消耗掉。因此,去离子水和离子富集的交替的流道形成了。
3楼2010-11-05 13:09:44
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echommm

金虫 (小有名气)

还有有两处不明白:
1. are depleted of ions, as they migrate through the membranes.  
指谁depleted of ions(失电子)?此处they又指什么?
2. In the adjacent channels, the membranes do not allow migration in the direction the ions are drawn.
在相邻通道,膜不容许发生吸引离子的移动。(不理解)
4楼2010-11-05 13:30:23
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