کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4908698 | 1362583 | 2017 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ortho-Nitro-Phenol adsorption onto alumina and surfactant modified alumina: kinetic, isotherm and mechanism
ترجمه فارسی عنوان
جذب ارتو نیترو-فنل بر آلومینا اصلاح شده آلومینا و سورفاکتانت: جنبشی، ایزوترم و مکانیسم
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Alumina (Al2O3) and its elaborated composite, Hexadecyl Tri Methyl Ammonium Bromide/Al2O3 (HDTMA/Al2O3), were used as adsorbents for removal of ortho-nitrophenol (ONP) from aqueous solution. The adsorbents were characterized by means of FTIR, B.E.T, XRD, and TEM analysis. Adsorption experiments were conducted in a batch system as a function of ONP concentration (4 Ã 10â4 M), contact time and temperature (25 to 45 °C). The experimental results indicate that, HDTMA/Al2O3 adsorbent possesses a greater affinity toward ONP than Al2O3 at pH = 6. Pseudo-first order, pseudo-second order and intraparticle diffusion models were used to analyze the kinetic data obtained at different concentrations. The pseudo-second-order kinetic model provided the best fit to the experimental data for the adsorption of ONP on both adsorbents, and the intra-particle diffusion was not only the rate controlling step. The equilibrium adsorption data were analyzed by Langmuir, Freundlich, Redlich-Peterson and Temkin isotherm models. The results indicate that the Langmuir model does not provide the best fit of the experimental data. A thermodynamic study indicates that the adsorption of ONP on both adsorbents has been found to be spontaneous and endothermic in nature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Chemical Engineering - Volume 5, Issue 4, August 2017, Pages 3418-3428
Journal: Journal of Environmental Chemical Engineering - Volume 5, Issue 4, August 2017, Pages 3418-3428
نویسندگان
M. Aazza, H. Ahlafi, H. Moussout, H. Maghat,