Mao Haixin, Wang Shikui, Lin Jian-Ying, Wang Zengshuang, Ren Jun
College of Chemistry and Chemical Engineering, Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China.
College of Chemistry and Chemical Engineering, Key Laboratory of Coal Science and Technology, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China.
J Environ Sci (China). 2016 Nov;49:179-188. doi: 10.1016/j.jes.2016.05.048. Epub 2016 Nov 15.
A magnetic carbon composite, FeO/C composite, was fabricated by one-step hydrothermal synthesis, modified by heat treatment under an inert atmosphere (N), and then used as an adsorbent for ciprofloxacin (CIP) removal. Conditions for the modification were optimized according to the rate of CIP removal. The adsorbent was characterized by Fourier transform infrared spectroscopy, X-ray diffraction measurements, vibrating-sample magnetometry, scanning electron microscopy, transmission electron microscopy, and N adsorption/desorption isotherm measurements. The results indicate that the modified adsorbent has substantial magnetism and has a large specific area, which favor CIP adsorption. The effects of solution pH, adsorbent dose, contact time, initial CIP concentration, ion strength, humic acid and solution temperature on CIP removal were also studied. Our results show that all of the above factors influence CIP removal. The Langmuir adsorption isotherm fits the adsorption process well, with the pseudo second-order model describing the adsorption kinetics accurately. The thermodynamic parameters indicate that adsorption is mainly physical adsorption. Recycling experiments revealed that the behavior of adsorbent is maintained after recycling for five times. Overall, the modified magnetic carbon composite is an efficient adsorbent for wastewater treatment.
通过一步水热合成法制备了磁性碳复合材料FeO/C复合材料，在惰性气氛（N）下进行热处理对其进行改性，然后用作去除环丙沙星（CIP）的吸附剂。根据CIP的去除率对改性条件进行了优化。通过傅里叶变换红外光谱、X射线衍射测量、振动样品磁强计、扫描电子显微镜、透射电子显微镜和N吸附/解吸等温线测量对吸附剂进行了表征。结果表明，改性后的吸附剂具有较强的磁性和较大的比表面积，有利于CIP的吸附。还研究了溶液pH值、吸附剂剂量、接触时间、初始CIP浓度、离子强度、腐殖酸和溶液温度对CIP去除的影响。我们的结果表明，上述所有因素都会影响CIP的去除。Langmuir吸附等温线很好地拟合了吸附过程，伪二级模型准确地描述了吸附动力学。热力学参数表明吸附主要是物理吸附。循环实验表明，吸附剂在循环使用五次后仍保持其性能。总体而言，改性磁性碳复合材料是一种用于废水处理的高效吸附剂。
