Zhang Jing, Xie Shaodong, Ho Yuh-Shan
Department of Environmental Sciences, State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Science and Engineering, Peking University, Beijing, People's Republic of China.
J Hazard Mater. 2009 Jun 15;165(1-3):218-22. doi: 10.1016/j.jhazmat.2008.09.098. Epub 2008 Oct 2.
Adsorption of fluoride ions from water using modified attapulgite with magnesium and aluminum salts was conducted by batch experiments. The effects of temperatures and mass ratios of attapulgite, magnesium and aluminum salts were investigated. Linear and non-linear methods were applied for fitting the adsorption data with Langmuir, Freundlich, and Redlich-Peterson isotherms. Modified attapulgite with a mass ratio attapulgite:Mg Cl(2)x6H(2)O:AlCl(3)x2H(2)O=2:1:2 had higher fluoride adsorption capacity. In addition, the fluoride adsorption using the modified attapulgite included an anion exchange process.
采用分批实验法，用镁盐和铝盐改性凹凸棒石从水中吸附氟离子。研究了温度以及凹凸棒石、镁盐和铝盐质量比的影响。采用线性和非线性方法，用朗缪尔等温线、弗伦德利希等温线和雷德利希-彼得森等温线对吸附数据进行拟合。凹凸棒石:MgCl₂·6H₂O:AlCl₃·2H₂O质量比为2:1:2的改性凹凸棒石具有更高的氟吸附容量。此外，用改性凹凸棒石吸附氟包括一个阴离子交换过程。
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