Saravanan R, Ravikumar L
Water Environ Res. 2017 Jul 1;89(7):629-640. doi: 10.2175/106143016X14733681696329.
A novel approach toward chemically modified cellulose bearing active chelating Schiff base with hydroxyl group (Cell-Hy) was synthesized. The modified cellulose was examined for its heavy metal ion uptake potential from aqueous solution. The chemical and structural features of the adsorbent were characterized by Fourier transform infrared spectroscopy (FT-IR), solid state 13C-NMR, Scanning Electron Microscopy (SEM), and energy dispersive analysis of X-ray (EDAX) observations. The experimental conditions and adsorption parameters, including pH, initial metal ion concentration, adsorbent dosage, temperature, and contact time were optimized for the removal of Cu(II) and Pb(II) ions. Kinetic parameters, equilibrium adsorption capacities, and correlation coefficients for pseudo-first-order, pseudo-second-order, and intraparticle diffusion models were carried out. The data obtained from the adsorption of Cu(II) and Pb(II) onto Cell-Hy were subjected to Langmuir and Freundlich isotherm models. Thermodynamic parameters have also been evaluated. The antibacterial activity of modified cellulose was tested toward specific bacterial species.
合成了一种新型的带有活性螯合席夫碱和羟基的化学改性纤维素（Cell-Hy）。研究了改性纤维素从水溶液中摄取重金属离子的潜力。通过傅里叶变换红外光谱（FT-IR）、固态13C-NMR、扫描电子显微镜（SEM）和X射线能量色散分析（EDAX）观察对吸附剂的化学和结构特征进行了表征。对去除Cu(II)和Pb(II)离子的实验条件和吸附参数进行了优化，包括pH值、初始金属离子浓度、吸附剂用量、温度和接触时间。对拟一级、拟二级和颗粒内扩散模型的动力学参数、平衡吸附容量和相关系数进行了测定。将Cu(II)和Pb(II)吸附到Cell-Hy上获得的数据采用Langmuir和Freundlich等温线模型进行处理。还评估了热力学参数。测试了改性纤维素对特定细菌种类的抗菌活性。
