采用共沉淀法制备Mn-Al双氢氧化物吸附剂,并利用扫描电子显微镜(Scanning Electron Microscope,SEM)、红外光谱(Fourier transform infrared spectroscopy,FTIR)和比表面积分析仪(Brunauer-Emmett-Teller surface area,BET)等对吸附材料进行了分析.并考察了其对氟离子吸附过程的热力学和动力学,并计算不同温度下该吸附过程的热力学参数.实验结果表明:pH值对Mn-Al吸附剂除氟效能有一定的影响,pH值为6时吸附容量最佳达到了44.15 mg·g-1;实验数据遵循拟二级反应动力学模型;Mn-Al吸附剂对氟离子的吸附符合Langmuir-Freundlich吸附等温模型;热力学参数吉布斯自由能(△G0)小于零,焓变(△H0)>0,熵变(△S0)>0,说明Mn-Al双氢氧化物吸附剂对氟离子的吸附反应是自发吸热熵增过程.
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