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Implications of membrane fouling toward the removal of the pharmaceutical sulfamethoxazole by nanofiltration processes

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第8期12卷 575-582页

作者： Alexander SIMON William PRICE Long Duc NGHIEM School of Civil Mining and Environmental Engineering the University of Wollongong School of Chemistry the University of Wollongong

The influence of membrane fouling on the retention of the trace organic contaminant sulfamethoxazole by a nanofiltration(NF) process was *** fouling caused a severe flux decline possibly due to pore blocking and adsorption directly after the commencement of the fouling layer *** membrane-foulant interactions were absent for colloidal fouling,which resulted in a more gradual flux *** charge played a significant role in the separation process of inorganic salts,where the retention was the highest in a caustic environment(high pH) due to more swollen membrane material caused by the higher negative charge on the *** fouling and a combination of colloidal and organic fouling led to a significant increase in the membrane negative *** influence of membrane fouling on solute retention was dependent on the fouling behaviour and the physicochemical properties of the model foulants,where the model foulants probably contributed to an increase in the retention of charged solutes due to enhanced electrostatic *** fouling caused an increase in the retention of inorganic salts and sulfamethoxazole due to pore *** contrast,colloidal fouling caused a decrease in the retention of inorganic salts due to cake-enhanced concentration ***,the presence of a colloidal fouling layer did not reduce the retention of sulfamethoxazole.A mixture of colloidal and organic matter improved the retention of inorganic salts.A similar conclusion can be inferred for sulfamethoxazole at pH 4 when the compound exists in a neutral form.

关键词： Nanofiltration(NF) Organic fouling Colloidal fouling combined fouling Trace organics Water reuse

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