摘要
为进一步提高活性氧化铝的吸附性能,设计了一种先酸化再化学浸渍的改性方法,分别制备两种吸附剂:载镧/镁硝酸酸化活性氧化铝(LHAA/MHAA)。研究了LHAA与MHAA的吸附性能,探讨了除氟机理。结果表明,吸附时间2 h,投加量2 g/L,pH=6,振荡频率180 r/min,对20 mg/L的含氟水最佳去除率分别为93%与90%,最大吸附容量为17.64 mg/g与10.96 mg/g,两者对氟离子的吸附等温线均符合Langmuir等温线模型,吸附动力学拟合均符合伪二级动力学。
In order to further improve the adsorption performance of activated alumina,two kinds of adsorbents,nitrate acidified activated alumina loaded lanthanum(LHAA)and loaded magnesium(MHAA),were prepared with the combination of nitrate acidification and chemical impregnation.The adsorption performance of LHAA and MHAA was studied,and the mechanism of fluoride removal was explored.The results showed that the optimal removal rate of 20 mg/L fluoride water were 93%and 90%respectively,and the maximum adsorption capacities were 17.64 mg/g and 10.96 mg/g,respectively,when the adsorption time was 2 h,the dosage was 2 g/L,pH=6,and the oscillation frequency was 180 r/min.The adsorption isotherms of fluoride ions by both of them conformed to the Langmuir isotherm model,and the adsorption kinetics fitting conformed to the pseudo second order kinetics.
作者
阎晗
刘海燕
刘洋虹
殷耀兵
YAN Han;LIU Hai-yan;LIU Yang-hong;YIN Yao-bing(School of Energy and Environmental Engineering,Hebei University of Engineering,Handan 056038,China;School of Materials Science and Engineering,Hebei University of Engineering,Handan 056038,China)
出处
《应用化工》
CAS
CSCD
2024年第2期354-357,共4页
Applied Chemical Industry
基金
河北省重大科技成果转化项目(21281203Z)
河北省科技计划(17274008D)。
关键词
活性氧化铝
化学浸渍
酸化
吸附等温线
吸附动力学
除氟
modified activated alumina
chemical impregnation
acidification
adsorption isotherm
adsorption kinetics
defluorination
