Marino Tiziana, Russo Francesca, Rezzouk Lina, Bouzid Abderrazak, Figoli Alberto
Institute on Membrane Technology, ITM-CNR, Via P. Bucci 17C, 87036 Cosenza, Italy.
Materials and Electronic Systems Laboratory (LMSE), University of Bordj Bou Arreridj, El-Anasser 34030, Bordj Bou Arreridj, Algeria.
Membranes (Basel). 2017 Sep 30;7(4):57. doi: 10.3390/membranes7040057.
The aim of this work was the fabrication and the characterization of mixed matrix membranes (MMMs) for arsenic (As) removal from water. Membrane separation was combined with an adsorption process by incorporating the kaolin (KT2) Algerian natural clay in polymeric membranes. The effects of casting solution composition was explored using different amounts of polyethersufone (PES) as a polymer, polyvinyl-pyrrolidone (PVP K17) and polyethylene glycol (PEG 200) as pore former agents, -methyl pyrrolidone (NMP) as a solvent, and kaolin. Membranes were prepared by coupling Non-solvent Induced Phase Separation and Vapour Induced Phase Separation (NIPS and VIPS, respectively). The influence of the exposure time to controlled humid air and temperature was also investigated. The MMMs obtained were characterized in terms of morphology, pore size, porosity, thickness, contact angle and pure water permeability. Adsorption membrane-based tests were carried out in order to assess the applicability of the membranes produced for As removal from contaminated water. Among the investigated kaolin concentrations (ranging from 0 wt % to 5 wt %), a content of 1.25 wt % led to the MMM with the most promising performance.
这项工作的目的是制备并表征用于从水中去除砷（As）的混合基质膜（MMM）。通过将高岭土（KT2）这种阿尔及利亚天然粘土掺入聚合物膜中，将膜分离与吸附过程相结合。使用不同量的聚醚砜（PES）作为聚合物、聚乙烯吡咯烷酮（PVP K17）和聚乙二醇（PEG 200）作为致孔剂、N-甲基吡咯烷酮（NMP）作为溶剂以及高岭土，探索了铸膜液组成的影响。分别通过非溶剂诱导相分离和气相诱导相分离（NIPS和VIPS）制备膜。还研究了暴露于受控潮湿空气和温度的时间的影响。对所得的混合基质膜进行了形态、孔径、孔隙率、厚度、接触角和纯水渗透率方面的表征。进行了基于吸附膜的测试，以评估所制备的膜用于从受污染水中去除砷的适用性。在所研究的高岭土浓度（范围从0 wt%至5 wt%）中，1.25 wt%的含量使混合基质膜具有最有前景的性能。
