摘 要：
指出了底灰作为一种成本低廉的重金属修复剂已经初步显示出其对Cd良好的吸附效果,但用量较大。研究了用多酚还原纳米铁在液相条件下对底灰进行改性,用来提高底灰对Cd的吸附性能。用Freundlich模型和Langmuir等温吸附模型对试验数据进行了拟合,可得:BA、Fe-BA1、Fe-BA2、Fe-BA3、Fe-BA4、Fe-BA5的最大吸附量分别为8.46、9.54、11.91、24.10、33.09、38.39mg/g,结果表明:改性后底灰的吸附效果大大提高。由于Freundlich模型R2均大于Langmuir等温吸附模型R2,Freundlich模型更适合探究改性底灰吸附机理,改性底灰对Cd(Ⅱ)吸附属于多层吸附,且吸附机理较为复杂。
译 名：
Removal of Cd(Ⅱ)From Bottom Ash Loaded Nano-iron Preparation by Polyphenol
作 者：
Li Xiongguang;Hebei University of Geosciences;
关键词：
Bottom ash;;Nano iron;;adsorption
摘 要：
Bottom ash as a low cost of heavy metal repair agent has initially shown its good adsorption effect on Cdwith large amount of dosage.In this study,in order to modify the bottom ash,polyphenol was used to reduce nanoiron in the liquid phase to improve the adsorption of Cd on the bottom ash.The maximum adsorption capacities of BFA,Fe-BA1,Fe-BA2,Fe-BA3,Fe-BA4 and Fe-BA5 were 8.4552,9.5425 and 11.9117 respectively by Freundlich model and Langmuir isothermal adsorption model.And the Freundlich model R2 is more suitable than the Langmuir isothermal adsorption model R2.So Freundlich model is more suitable for exploring the mechanism of ash adsorption of modified Bottom ash.Modified bottom ash belongs to multi-layer adsorption for Cd(Ⅱ)adsorptionand adsorption mechanism is more complex.
