Department of Chemistry, Anna University, University College of Engineering - Dindigul, Dindigul 624 622, Tamilnadu, India.
Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia.
Int J Biol Macromol. 2021 Jul 1;182:1843-1851. doi: 10.1016/j.ijbiomac.2021.05.132. Epub 2021 May 21.
The promising adsorbent like graphene oxide (GO), chitosan (CS) and amine functionalized graphene oxide (AGO) decorated chitosan (CS) namely AGO@CS composite beads was efficiently prepared for defluoridation studies. The prepared AGO@CS composite beads possess enriched defluoridation capacity (DC) of 4650 mgF kg. Batch method was used to optimize the maximum DC of AGO@CS composite beads. The physicochemical properties of AGO@CS composite beads were explored by numerous instrumental techniques viz., FTIR, Raman, XPS, SEM and TGA investigation. The experimental values of AGO@CS composite beads for fluoride removal at various temperature conditions were assessed with adsorption isotherms, kinetic and thermodynamic studies. The possible defluoridation mechanism of AGO@CS beads was mostly proposed that electrostatic attraction. The reusability and field investigation results of AGO@CS beads shows they are regenerable and applicable at field circumstances.
具有前景的吸附剂，如氧化石墨烯（GO）、壳聚糖（CS）和胺功能化氧化石墨烯（AGO）修饰的壳聚糖（CS），即 AGO@CS 复合珠，被有效地制备用于除氟研究。所制备的 AGO@CS 复合珠具有丰富的除氟容量（DC），可达 4650 mgF kg。采用批量法优化了 AGO@CS 复合珠的最大 DC。通过多种仪器技术，如傅里叶变换红外光谱（FTIR）、拉曼光谱、X 射线光电子能谱（XPS）、扫描电子显微镜（SEM）和热重分析（TGA），研究了 AGO@CS 复合珠的物理化学性质。通过吸附等温线、动力学和热力学研究，评估了 AGO@CS 复合珠在不同温度条件下对氟化物去除的实验值。AGO@CS 珠的可能除氟机制主要是静电吸引。AGO@CS 珠的可重复使用性和现场调查结果表明，它们在现场环境下是可回收和适用的。
