Deng Qiulin, Chen Chong, Lei Qin, Liang Jianhao, Zhang Tinghong, Jiang Jinlong
School of Materials Science and Engineering, State Key Laboratory for Environment-friendly Energy Materials, Southwest University of Science and Technology 59 Qinglong Road Mianyang 621010 P. R. China
Jiangsu Provincial Key Laboratory of Palygorskite Science and Applied Technology, Huaiyin Institute of Technology 1 Meicheng Road Huaian 223003 P. R. China
RSC Adv. 2018 Jun 27;8(41):23382-23389. doi: 10.1039/c8ra04143a. eCollection 2018 Jun 21.
Adsorption is an efficient treatment method for aniline removal in water treatment. In this work, the composites of graphene oxide-modified attapulgite were prepared and used firstly to remove aniline from wastewater. The composites were characterized by Fourier transformed infrared, Brunauer-Emmett-Teller, scanning electron microscopy and X-ray diffraction analysis. The effects of initial concentration, time, temperature and pH value on adsorption of aniline on graphene oxide-modified attapulgite are investigated. pH and temperature are found to have a significant influence on the adsorption amount. The experimental results showed that graphene oxide-modified attapulgite possesses strong adsorption ability for aniline with hydrogen bond interaction. The saturated adsorption amount could reach up to 90 mg g at pH = 2-4. The Langmuir isotherm is found to describe well the equilibrium adsorption data. Finally, graphene oxide-modified attapulgite is also observed to possess excellent reusability.
吸附是水处理中去除水中苯胺的一种有效处理方法。在本研究中，制备了氧化石墨烯改性凹凸棒石复合材料，并首次用于去除废水中的苯胺。通过傅里叶变换红外光谱、布鲁诺尔-埃米特-特勒比表面积测定法、扫描电子显微镜和X射线衍射分析对复合材料进行了表征。研究了初始浓度、时间、温度和pH值对苯胺在氧化石墨烯改性凹凸棒石上吸附的影响。发现pH值和温度对吸附量有显著影响。实验结果表明，氧化石墨烯改性凹凸棒石通过氢键相互作用对苯胺具有较强的吸附能力。在pH = 2 - 4时，饱和吸附量可达90 mg/g。发现朗缪尔等温线能很好地描述平衡吸附数据。最后，还观察到氧化石墨烯改性凹凸棒石具有优异的可重复使用性。
