KPR Institute of Engineering and Technology, Coimbatore 641407, India E-mail:
Kumaraguru College of Technology, Coimbatore 641049, India.
Water Sci Technol. 2019 Oct;80(8):1549-1561. doi: 10.2166/wst.2019.404.
Cellulose bearing pendant Schiff base with heterocyclic chelating groups (CMC-Bz) was synthesized, which were fully characterized using various instrumental techniques such as solid state carbon-13 nuclear magnetic resonance (C-NMR), Fourier transform infrared (FTIR), scanning electron microscope (SEM) and energy dispersive X-ray analysis (EDX) spectra. The adsorption of toxic metals onto cellulosic material was tested in a batch mode operation. The adsorption functional factors such as pH, adsorbent dose, metal ion concentration, equilibrium time and temperature were experimentally optimized for the maximum removal of Cu(II) and Pb(II) ions. Adsorption isotherms were evaluated with Langmuir, Freundlich, Temkin and Redlich-Peterson isotherms. Kinetic parameters and equilibrium adsorption capacities were investigated for pseudo-first-order, pseudo-second-order and intra-particle diffusion models. Thermodynamic parameters and reusability were also evaluated.
合成了带有杂环螯合基团的纤维素支载希夫碱（CMC-Bz），并使用各种仪器技术（如固态碳-13 核磁共振（C-NMR）、傅里叶变换红外（FTIR）、扫描电子显微镜（SEM）和能谱（EDX）谱）对其进行了全面表征。在分批操作中测试了有毒金属对纤维素材料的吸附。实验优化了吸附功能因素，如 pH 值、吸附剂剂量、金属离子浓度、平衡时间和温度，以实现 Cu(II) 和 Pb(II) 离子的最大去除。用 Langmuir、Freundlich、Temkin 和 Redlich-Peterson 等吸附等温线对吸附等温线进行了评价。研究了准一级、准二级和内扩散模型的动力学参数和平衡吸附容量。还评估了热力学参数和可重复使用性。
