Environment and Membrane Technology Laboratory, Department of Chemical Engineering, National Institute of Technology, Durgapur, 713209, India.
Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India.
Environ Sci Pollut Res Int. 2018 Jun;25(17):16579-16589. doi: 10.1007/s11356-018-1829-1. Epub 2018 Mar 29.
A novel graphene-based nanocomposite membrane was synthesized by interfacial polymerization (IP) through chemical bonding of the graphene oxide (GO) layer to polyethersulfone surface. Detailed characterization of the composite membrane through AFM, SEM, ATR-FTIR, XRD analysis, and Raman spectroscopy indicates strong potential of the membrane in highly selective removal of the toxic contaminants like arsenic and fluoride while permeating the essential minerals like calcium and magnesium. This makes the membrane suitable for production of safe drinking water from contaminated water. The membrane applied in a flat-sheet cross-flow module succeeded in removal of more than 98% arsenic and around 80% fluoride from contaminated water while selectively retaining the useful calcium and magnesium minerals in drinking water. A sustained pure water flux of around 150 LMH (liter per square meter per hour) during operation over long hours (> 150 h) with only 3-5% drop in flux indicates antifouling character of the membrane module.
通过界面聚合（IP），通过将氧化石墨烯（GO）层化学结合到聚醚砜表面，合成了一种新型基于石墨烯的纳米复合膜。通过 AFM、SEM、ATR-FTIR、XRD 分析和 Raman 光谱对复合膜进行的详细表征表明，该膜在选择性去除砷和氟等有毒污染物的同时渗透基本矿物质（如钙和镁）方面具有很强的潜力。这使得该膜适用于从污染水中生产安全饮用水。该膜应用于平板式错流模块，成功地从污染水中去除了超过 98%的砷和大约 80%的氟，同时选择性地保留了饮用水中的有用钙和镁矿物质。在长时间 (>150 h) 运行期间，纯水通量保持在约 150 LMH（每小时每平方米升）左右，通量仅下降 3-5%，表明膜模块具有抗污染特性。
