کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9468317 | 1317021 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic powder MnO-Fe2O3 composite-a novel material for the removal of azo-dye from water
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Magnetic powder MnO-Fe2O3 composite-a novel material for the removal of azo-dye from water Magnetic powder MnO-Fe2O3 composite-a novel material for the removal of azo-dye from water](/preview/png/9468317.png)
چکیده انگلیسی
Fine powder adsorbents or catalysts often show better adsorptive or catalytic properties, but they encounter the difficulties of separation and recovery in application. In this study, four inexpensive magnetic powder MnO-Fe2O3 composites used as adsorbent-catalyst materials were prepared and characterized. These materials could be recovered efficiently by a magnetic separation method. Their adsorptive properties for the removal of an azo-dye, acid red B (ARB), from water and the regeneration of adsorbents containing ARB by catalytic combustion was studied. These powder adsorbents showed excellent adsorption towards ARB under acidic conditions. A very fast adsorption rate was observed and could be well described by a pseudo-second-order kinetics model. The adsorption capacity increased with increasing Fe content and surface area of the adsorbent, and the highest adsorption capacity of 105.3 mg/g was obtained at pH 3.5. The adsorption was not affected by the presence of Clâ, but was significantly affected by SO42â. The adsorbent containing ARB can be regenerated by catalytic combustion of adsorbed ARB at 400 °C in air. Laboratory experiments demonstrated that this material is reusable.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 39, Issue 4, February 2005, Pages 630-638
Journal: Water Research - Volume 39, Issue 4, February 2005, Pages 630-638
نویسندگان
Rongcheng Wu, Jiuhui Qu, Yongsheng Chen,