Treatment of textile dye effluent using a polyamide-based nanofiltration membrane
Treatment of textile dye effluent using a polyamide-based nanofiltration membrane
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DOI：
10.1016/s0255-2701(01)00181-7
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发表时间：
2002-08-01
影响因子：
4.3
通讯作者：
Aptel, P
中科院分区：
文献类型：
--
作者：
Akbari, A;Remigy, JC;Aptel, P
实验用7种染料和一个Desal 5DK膜（截止，150-300 g/mol）进行。研究了浓度、pH和盐对通量和滞留率的影响。膜的切断解释了相对高分子量染料（如直接红80或直接黄8）的保留率几乎总是100%。对于阴离子染料，如酸橙10或酸红4，聚酰胺的两性性质解释了pH值为3时比pH值为6时保留率低的原因。这种效果在碱性蓝3（一种阳离子染料）中更为明显。由于大多数染料用于聚酰胺织物染色，膜对污垢很敏感。此外，盐的存在导致通量进一步减少。(C) 2002 Elsevier Science B.V.版权所有
Experiments were run with seven dyes and a Desal 5DK membrane (cut-off, 150-300 g/mole). The effects of concentration, pH and salt on flux and retention were studied. The cut-off of the membrane explains that the retention of the relative high molecular weight dyes (as direct red 80 or direct yellow 8) is always almost 100%. For anionic dyes as acid orange 10 or acid red 4, the amphoteric nature of polyamide explains the lower retention at pH 3 than 6. This effect is more pronounced and reversed for basic blue 3, a cationic dye. The membrane is sensitive to fouling since most of the dyes are used for polyamide textile dying. Moreover, the presence of salt leads to a further decrease in flux. (C) 2002 Elsevier Science B.V. All rights reserved.