College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
Carbohydr Polym. 2017 Feb 10;157:576-585. doi: 10.1016/j.carbpol.2016.10.025. Epub 2016 Oct 12.
FeO@SiO-Chitosan/GO (MSCG) nanocomposite was investigated by various techniques (SEM, TEM, XRD, VSM, FT-IR, XPS) for the removal of tetracycline (TC). Effects of pH, zeta potential and initial contaminant concentration were studied in detail. Four background cations (Na, K, Ca and Mg) with a concentration of 0.01M showed little influence on the TC adsorption at the studied pH range while the divalent heavy metal cation Cu(II) could significantly enhance the adsorption. The results indicated that the highest adsorption capacity of TC were 183.47mmol/kg and 67.57mmol/kg on MSCG with and without Cu(II), respectively. According to mechanism investigation for the adsorption of TC by pH impact study and XPS analysis, besides electrostatic interaction and π-π interactions, the Cu(II) also acts as a bridge between TC and MSCG, which significantly improve the adsorption of TC. This study provided valuable guidance and effective method for the removal of TC from aquatic environments.
FeO@SiO-Chitosan/GO (MSCG) 纳米复合材料通过各种技术（SEM、TEM、XRD、VSM、FT-IR、XPS）进行了研究，用于去除四环素 (TC)。详细研究了 pH 值、zeta 电位和初始污染物浓度的影响。在研究的 pH 范围内，浓度为 0.01M 的四种背景阳离子（Na、K、Ca 和 Mg）对 TC 吸附的影响很小，而二价重金属阳离子 Cu(II) 可显著增强吸附。结果表明，TC 在 MSCG 上的最大吸附容量分别为 183.47mmol/kg 和 67.57mmol/kg（有无 Cu(II)）。根据 pH 值影响研究和 XPS 分析的 TC 吸附机理研究，除了静电相互作用和π-π相互作用外，Cu(II) 还可以作为 TC 和 MSCG 之间的桥梁，从而显著提高 TC 的吸附。本研究为从水环境中去除 TC 提供了有价值的指导和有效方法。
