کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
144282 438926 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Textile dye removal from aqueous solutions using cheap MgO nanomaterials: Adsorption kinetics, isotherm studies and thermodynamics
ترجمه فارسی عنوان
حذف رنگ نساجی از محلول های آبی با استفاده از نانو مواد مغذی ارزان: سینتیک جذب، مطالعات ایزوترم و ترمودینامیک
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• MgO adsorbents were successfully synthesized by sol–gel and precipitation methods.
• The MgOS adsorbent had the highest dye removal efficiency from aqueous solutions.
• A nanorod-like shape with high SBET and pore volume is obtained by sol–gel method.
• Thermodynamic study showed that the dye adsorption is exothermic and spontaneous.

In the present study, three MgO nanomaterials (MgOS, MgON and MgOU) were synthesized by sol–gel and two different precipitation methods, respectively, and used for the sorption of Remazol Red RB-133 from aqueous solution. The effect of parameters like contact time, initial dye concentration and temperature on the adsorption capacity was studied. The adsorption isotherm studies were carried out using Langmuir, Freundlich and Temkin models. Langmuir was the most suitable model to describe the adsorption isotherm. Pseudo- first -order model fitted well with good agreement with the experimental values of qe (equilibrium adsorption capacity). The complete removal efficiency of the dye on MgOS, MgON and MgOU adsorbents was attained when the contacting time was continued to 11, 40 and 60 min, respectively. Hence, the MgOS adsorbent was found to possess the highest removal efficiency of the dye from aqueous solutions. In addition, the thermodynamic parameters, ΔH°, ΔS°, ΔG°, and Ea were also calculated for Remazol Red RB-133 adsorption onto MgOS adsorbent. In order to reveal the adsorptive characteristic of MgO nanomaterials, XRD, HR-TEM, FT-IR and N2 adsorption/desorption isotherms were carried out. The results showed that MgOS nanomaterial had potentially lowering capital and operational costs for practical applications.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advanced Powder Technology - Volume 27, Issue 1, January 2016, Pages 223–231
نویسندگان
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