Nanofiltration of hormones and pesticides in different real drinking water sources

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• 作者：Sandra Sanches^a ; ^b ; Ana Penetra^c ; Alexandre Rodrigues^c ; Elisabete Ferreira^c ; Ví ; tor V. Cardoso^c ; Maria Joã ; o Benoliel^c ; Maria T. Barreto Crespo^a ; ^b ; Vanessa J. Pereira^a ; ^b ; ^{vanessap@itqb.unl.pt} ; Joã ; o G. Crespo^d
• 关键词：Pesticides ; Hormones ; Nanofiltration ; Static and dynamic adsorption ; Natural water matrices ; Water treatment
• 刊名：Separation and Purification Technology
• 出版年：2012
• 期刊代码：78_13835866
• 类别：ce
• 出版时间：19 June, 2012
• 卷：94
• 期：Complete
• 页码：44-53
• 文件大小：525 K

摘要

This study addresses the efficiency of nanofiltration to remove different pesticides and hormones from different real water sources (surface water and groundwater) and the effect of the ionic composition of different water sources on the rejection of the target micropollutants. Ultrafiltration was performed prior to the nanofiltration process to remove particulate and large colloidal organic matter, that interfere in the rejection of micropollutants during nanofiltration, without affecting the concentration of ionic species and natural organic matter present in the water. The other aim of this study was to understand the role of adsorption on the rejection of the solutes selected, which was tested by conducting membrane pre-adsorption experiments using these micropollutants under static and dynamic conditions.

High percent rejections (67.4-99.9%) were obtained for the pesticides and hormones, often independently of the water composition. Size exclusion and hydrophobic interactions were found to highly influence the rejections obtained. The lower rejections (57.5-83.5%) obtained for pentachlorophenol could be explained by its increased solubility at the waters鈥?pH. The overall nanofiltration efficiency to remove the selected compounds was not found to be considerably affected by the pre-adsorption of the compounds on the membrane under static and dynamic conditions, except for 17伪-ethinylestradiol, estrone, and estriol in surface water.