摘要
通过水解法在50℃低温条件下合成了锐钛矿型TiO2,使用XRD、FT-IR、BET等方法对TiO2进行了表征,并研究其对水中氟离子的吸附行为。结果表明:所合成锐钛矿型TiO2比表面积达到278.93 m2/g,常温下对氟离子的最大吸附量为30.02 mg/g。吸附过程符合Langmuir等温线模型和准一级动力学模型,是自发性的吸热过程,吸附机理为静电吸引。
In this study,the anatase TiO2 samples were obtained by hydrolysis at 50℃.The as-prepared TiO2 samples were characterized by X-ray diffraction,Fourier transform infrared spectroscopy and Brunner Emmet Teller.Then the adsorption behavior of fluoride ion onto the as-prepared TiO2 from water was studied.The results showed that the as-prepared TiO2 samples had a specific surface area of 278.93 m2/g.The maximum adsorption capacity of the TiO2 adsorbents could reach 30.02 mg/g according to Langmuir model.The adsorption process could be well descripted by the Langmuir isothermal equation and the pseudo first-order equation.The adsorption process was confirmed to be a spontaneous and exothermic process,which was prominently conducted through electrostatic attraction.
作者
付娆
张文龙
冯江涛
延卫
FU Rao;ZHANG Wen-long;FENG Jiang-tao;YAN Wei(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《环境工程》
CAS
CSCD
北大核心
2020年第2期70-76,共7页
Environmental Engineering
基金
陕西省重点研发计划资助项目(2017SF-386)
中央高校基本科研业务费专项资金资助项目(1191329818)。
关键词
氟离子
吸附
二氧化钛
饮用水
fluoride ion
adsorption
titanium dioxide
drinking water
