Liu Guanxiong, Xue Caibao, Zhu Peizhi
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
Nanomaterials (Basel). 2017 Jun 5;7(6):137. doi: 10.3390/nano7060137.
In this study, carbonated hydroxyapatite (CHA) nanorods were prepared by a novel hydrothermal method. The crystallinity and chemical structure of synthesized CHA nanorods was characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS), respectively. Carmine was selected as representative organic dyes to study the adsorption capacities of CHA nanorods. Mechanistic studies of carmine adsorption by CHA nanorods show that the adsorption processes both follow the pseudo-second-order kinetic model and fit the Langmuir isotherm model well. The CHA nanorods exhibited a high adsorption capacity of 85.51 mg/g for carmine at room-temperature. The experimental results prove that CHA nanorods can be promising absorbents for removing organic dye pollutants in wastewater from paper and textile plants.
在本研究中，采用一种新型水热法制备了碳酸羟基磷灰石（CHA）纳米棒。分别通过透射电子显微镜（TEM）、X射线衍射（XRD）、拉曼光谱和X射线光电子能谱（XPS）对合成的CHA纳米棒的结晶度和化学结构进行了表征。选择胭脂红作为代表性有机染料来研究CHA纳米棒的吸附容量。对CHA纳米棒吸附胭脂红的机理研究表明，吸附过程均遵循准二级动力学模型，且与朗缪尔等温线模型拟合良好。CHA纳米棒在室温下对胭脂红表现出85.51 mg/g的高吸附容量。实验结果证明，CHA纳米棒有望成为去除造纸厂和纺织厂废水中有机染料污染物的吸附剂。
