کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
583274 1453172 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Decolorization of KN-R catalyzed by Fe-containing Y and ZSM-5 zeolites
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Decolorization of KN-R catalyzed by Fe-containing Y and ZSM-5 zeolites
چکیده انگلیسی
Decolorization of an anthraquinone dye, Reactive Brilliant Blue KN-R by hydrogen peroxide was examined using Fe-containing Y and ZSM-5 zeolites as heterogeneous catalysts. Catalysts were prepared by ion-exchange and coprecipitation methods, and calcined at different temperatures. The surface morphologies, crystalline phases, and chemical-state of the catalysts were characterized by scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Influences of reaction conditions, such as dye concentration, catalyst dosage and solution pH, were evaluated and the relations between catalytic capacity and surface microstructures were discussed. The results showed that Fe-containing Y and ZSM-5 zeolites generally exhibited similar or better catalytic efficiency compared with homogeneous Fenton reagent, with Fe-containing ZSM-5 being more efficient. Synthesis method and calcination temperature affected catalytic efficiency and the stability of catalysts. Fe-containing ZSM-5, which was prepared by coprecipitation and calcined at 450 °C, displayed the greatest decolorization capacity. Under the conditions of initial pH 2.5, 30.0 mmol/L H2O2 and 4.0 g/L catalyst, 250 mg/L KN-R could be decolorized over 90% within 20 min.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 156, Issues 1–3, 15 August 2008, Pages 568-575
نویسندگان
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