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Adsorption of neutral organic fractions in reclaimed water on RO/NF membrane

机译：RO / NF膜对再生水中的中性有机成分的吸附

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This paper discusses the adsorption mechanisms involved in the rejection of neutral organic fractions using continuous-flow nanofiltration (NF) and reverse osmosis (RO) membrane experiments. It was found that the trend of membrane rejection curves varied with adsorption significance (σ). For those cases with a lower initial concentration for hydrophobic neutral (Hpo-N) fraction (except for SP-28 membrane), the adsorbed organics on membrane surface showed a more significant effect (higher σ) on, thus the rejection trend exhibited a three-stage profile: (I) increase in rejection due to initial adsorption and membrane structure change, (II) decrease in rejection because of decreasing adsorption since breakthrough, and (III) no further change in rejection after the saturation of adsorption. For those cases with lower σ, a mild Stage I could still be identified. However, the rejection efficiency remained constant subsequently. In contrast, when σ is even lower, no adsorption effect could be observed throughout the experimental period.
机译：本文讨论了使用连续流纳滤（NF）和反渗透（RO）膜实验截留中性有机部分所涉及的吸附机理。发现膜截留曲线的趋势随吸附显着性（σ）变化。对于疏水性中性（Hpo-N）馏分的初始浓度较低的那些情况（SP-28膜除外），膜表面吸附的有机物表现出更显着的影响（较高的σ），因此排斥趋势显示出三个-阶段曲线：（I）由于初始吸附和膜结构变化而导致的排斥增加，（II）由于穿透后吸附减少而导致的排斥减少，以及（III）在吸附饱和后排斥的进一步变化。对于那些具有较低σ的情况，仍然可以确定为轻度I期。然而，拒绝效率随后保持恒定。相反，当σ更低时，在整个实验期间都没有观察到吸附效果。

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