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Removal of antibiotics from a model wastewater by RO/NF membranes

机译：通过RO / NF膜去除模型废水中的抗生素

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Removal of antibiotics by reverse osmosisanofiltration (RO/NF) from a model wastewater of a manufacturing plant producing pharmaceuticals for veterinary use was investigated.The rejection of the examined antibiotics by the selected RO and the tight NF membranes is acceptably high,exceeding in most cases 98.5%.The loose NF membrane retains the smaller antibiotics molecules less effective.Relating the solute rejections to the membranes' porosity has shown that the prevailing rejection mechanism of the examined antibiotics by all the membranes was the size exclusion effect.The rejection of the low molecular organic compounds by all the examined membranes is lower,ranging from 0.517 to 0.976 for the RO and tight NF membranes,and from 0.247 to 0.506 for the loose NF membrane.The rejections also follow the order of the solutes' molecular size.However,the specific physicochemical effects can influence the rejection of some low molecular organics by the examined membranes.
机译：研究了通过反渗透/纳米过滤（RO / NF）从生产兽药的生产工厂的模型废水中去除抗生素的情况。所选RO和紧密的NF膜对所检查的抗生素的排斥率很高，超过了大多数情况下98.5％的NF膜松散保留了较小的抗生素分子，效果不佳。溶质排斥与膜的孔隙率相关表明，所有膜对被检抗生素的主要排斥机制是尺寸排阻效应。所有检测的膜中的低分子有机化合物均较低，RO和紧密NF膜的低分子有机化合物范围为0.517至0.976，而松散NF膜的低分子有机化合物范围为0.247至0.506。排斥率也遵循溶质的分子大小顺序。但是，特定的物理化学作用会影响被检查的膜对某些低分子有机物的排斥。

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