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Removal of Emerging Wastewater Organic Contaminants by Polyelectrolyte Multilayer Nanofiltration Membranes with Tailored Selectivity
ACS ES&T Engineering ( IF 7.4 ) Pub Date : 2020-12-17 , DOI: 10.1021/acsestengg.0c00160 Yunkun Wang 1 , Ines Zucker 2, 3 , Chanhee Boo 4 , Menachem Elimelech 5
ACS ES&T Engineering ( IF 7.4 ) Pub Date : 2020-12-17 , DOI: 10.1021/acsestengg.0c00160 Yunkun Wang 1 , Ines Zucker 2, 3 , Chanhee Boo 4 , Menachem Elimelech 5
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Emerging organic contaminants (EOCs) discharged from wastewater effluents into drinking water resources are of growing concern for human health and the environment. In this study, we demonstrate the fabrication and application of polyelectrolyte multilayer (PEM) nanofiltration (NF) membranes with tailored selectivity for effective removal of EOCs from saline wastewaters. The PEM NF membranes were prepared via layer-by-layer (LbL) assembly of a cationic polymer, i.e., poly(diallyl dimethylammonium chloride), and anionic polymer, i.e., poly(sodium styrenesulfonate). Extensive surface characterization verifies that the fabricated PEM membranes have different pore sizes and surface charge properties depending on the LbL deposition cycle. We evaluated the performance of the PEM NF membranes for the rejection of different salts as well as the retention of representative EOCs, including perfluoroalkyl substances (perfluorooctanoic acid and perfluorooctanesulfonic acid) and antibiotics (amoxicillin trihydrate and tetracycline hydrochloride). Importantly, the PEM NF membrane coated with four bilayers showed as high as 90% EOC retention, comparable to the widely used commercial NF270 membrane, while allowing high passage of salt, including scale-forming divalent cations (<20% rejections of NaCl and CaCl2). This tailored selectivity of the four-bilayer PEM membrane enables high water flux and reduced inorganic (gypsum) scaling potential compared to the NF270 membrane during treatment of EOC-contaminated wastewaters.
中文翻译：
定制选择性聚电解质多层纳米过滤膜去除新兴废水有机污染物
从废水排放到饮用水资源中的新兴有机污染物（EOC）越来越受到人类健康和环境的关注。在这项研究中，我们演示了具有定制选择性的聚电解质多层（PEM）纳滤（NF）膜的制造和应用，该膜可有效去除含盐废水中的EOC。PEM NF膜是通过阳离子聚合物（即聚二烯丙基二甲基氯化铵）和阴离子聚合物（即聚苯乙烯磺酸钠）的层（LbL）组装制备的。广泛的表面表征证明，根据LbL沉积周期，所制造的PEM膜具有不同的孔径和表面电荷特性。我们评估了PEM NF膜对不同盐的排斥性能以及代表性EOC（包括全氟烷基物质（全氟辛酸和全氟辛烷磺酸）和抗生素（阿莫西林三水合物和四环素盐酸盐）的保留）的性能。重要的是，与四个广泛使用的商用NF270膜相比，涂有四个双层的PEM NF膜表现出高达90％的EOC保留率，同时允许盐类高通量，包括形成水垢的二价阳离子（<20％的NaCl和CaCl排斥率2）。与NF270膜相比，在对EOC污染的废水进行处理时，这种四层PEM膜的定制选择性可实现高水通量，并减少了无机（石膏）结垢的可能性。
更新日期：2020-12-17
中文翻译：
定制选择性聚电解质多层纳米过滤膜去除新兴废水有机污染物
从废水排放到饮用水资源中的新兴有机污染物（EOC）越来越受到人类健康和环境的关注。在这项研究中，我们演示了具有定制选择性的聚电解质多层（PEM）纳滤（NF）膜的制造和应用，该膜可有效去除含盐废水中的EOC。PEM NF膜是通过阳离子聚合物（即聚二烯丙基二甲基氯化铵）和阴离子聚合物（即聚苯乙烯磺酸钠）的层（LbL）组装制备的。广泛的表面表征证明，根据LbL沉积周期，所制造的PEM膜具有不同的孔径和表面电荷特性。我们评估了PEM NF膜对不同盐的排斥性能以及代表性EOC（包括全氟烷基物质（全氟辛酸和全氟辛烷磺酸）和抗生素（阿莫西林三水合物和四环素盐酸盐）的保留）的性能。重要的是，与四个广泛使用的商用NF270膜相比，涂有四个双层的PEM NF膜表现出高达90％的EOC保留率，同时允许盐类高通量，包括形成水垢的二价阳离子（<20％的NaCl和CaCl排斥率2）。与NF270膜相比，在对EOC污染的废水进行处理时，这种四层PEM膜的定制选择性可实现高水通量，并减少了无机（石膏）结垢的可能性。
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