کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
145247 | 456336 | 2016 | 49 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Adsorptive removal of fluoride from aqueous solutions using Al-humic acid-La aerogel composites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Adsorptive removal of fluoride from aqueous solutions using Al-humic acid-La aerogel composites Adsorptive removal of fluoride from aqueous solutions using Al-humic acid-La aerogel composites](/preview/png/145247.png)
چکیده انگلیسی
A novel and environmental friendly aerogel composite was synthesized by freeze-drying method using humic acid as low cost starting material. The as-prepared aluminum-humic acid-lanthanum (Al-HA-La) aerogel composites were fully characterized by nitrogen adsorption-desorption, SEM, EDX, XRD, FTIR and TGA Then, the adsorption behaviors of fluoride on Al-HA-La adsorbent were investigated systematically, including the influence of initial pH, adsorption kinetics, adsorption isotherms, desorption study, etc. Batch adsorption experimental results showed that the high fluoride removal of Al-HA-La was obtained in a wide initial pH range from 5 to 11. The adsorption equilibrium was achieved within 40 min (pH = 7.0), and the adsorption kinetics could be well fitted by the pseudo-second-order model. The adsorption isotherms could be well described by the Langmuir isotherm model and the maximum adsorption capacity calculated from Langmuir model was high up to 50 mg gâ1 at 298 K (pH = 7.0). Moreover, the co-existing of other anions and cations showed limited influence on the adsorption of fluoride on Al-HA-La. Furthermore, the fluoride adsorbed on Al-HA-La could be effectively desorbed using 10â2 mol Lâ1 NaOH, and the desorption efficiency was as high as 90%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 306, 15 December 2016, Pages 174-185
Journal: Chemical Engineering Journal - Volume 306, 15 December 2016, Pages 174-185
نویسندگان
Yong Liu, Qin Fan, Shixiang Wang, Yanlan Liu, Anlan Zhou, Lu Fan,