Department of Chemistry, Hacettepe University, Beytepe, 06800, Ankara, Turkey.
Environ Sci Pollut Res Int. 2018 Dec;25(34):34610-34622. doi: 10.1007/s11356-018-3407-y. Epub 2018 Oct 12.
A novel amine functionalized nonwoven cotton fabric (EDA-GMA-g-NCF) adsorbent material for As(V) adsorption was prepared by using plasma-initiated graft polymerization of glycidyl methacrylate (GMA) onto nonwoven cotton fabric (NCF) and then its modification with ethylenediamine (EDA). The resultant nonwoven cotton fabric adsorbent was examined by using FT-IR, SEM, and XPS techniques. As(V) adsorption experiments were performed in batch mode as a function of pH, contact time, initial concentration, coexisting ions, ionic strength, and tap water applications. Ethylenediamine carrying nonwoven cotton fabric-based functional adsorbent showed efficient, rapid As(V) removal with high adsorption capacity. The experimental data shows that adsorption mechanism fits to the Langmuir isotherm, and adsorption kinetic follows a pseudo-second-order model. Between pH 2-8 range, nonwoven cotton fabric adsorbent is effective at pH 3 for As(V) adsorption. The maximum adsorption capacity of the nonwoven cotton fabric for As(V) was 217.39 mg/g. The adsorbent could be easily regenerated at least ten cycles with 3% HNO solution. EDA-GMA-g-NCF was also efficient for tap water applications with high percent As(V) removal. Thermodynamic parameters show that the As(V) adsorption process was spontaneous and exothermic. Graphical abstract Preparation of cotton fabric adsorbent and As(V) treatment process.
一种新型胺功能化无纺棉织物（EDA-GMA-g-NCF）吸附剂材料，用于通过等离子体引发的甲基丙烯酸缩水甘油酯（GMA）接枝聚合到无纺棉织物（NCF）上，并随后用乙二胺（EDA）进行修饰，制备了用于吸附 As(V) 的吸附剂。使用 FT-IR、SEM 和 XPS 技术对所得无纺棉织物吸附剂进行了测试。作为（V）吸附实验以 pH、接触时间、初始浓度、共存离子、离子强度和自来水应用等功能在分批模式下进行。载有乙二胺的无纺棉织物基功能吸附剂表现出高效、快速去除 As(V) 的能力，具有高吸附容量。实验数据表明，吸附机理符合朗缪尔等温线，吸附动力学遵循准二级模型。在 2-8 pH 范围内，无纺棉织物吸附剂在 pH 3 时对 As(V)的吸附效果最佳。无纺棉织物对 As(V)的最大吸附容量为 217.39 mg/g。该吸附剂至少可在 3% HNO 溶液中再生十次。EDA-GMA-g-NCF 对高去除率的自来水应用也很有效。热力学参数表明，As(V)吸附过程是自发和放热的。
