کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4980985 | 1453333 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Catalytic potential of Cu/Mg/Al-chitosan for ozonation of real landfill leachate
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کلمات کلیدی
BOD5CMACOPBJHTOCAOPs - AOP هاBrunauer–Emmett–Teller - Brunauer-Emmett-TellerOzonation - اوزون زنیBarrett–Joyner–Halenda - بارت جوینر هالنداchemical oxygen demand - تقاضای اکسیژن شیمیاییBET - شرطLandfill leachate - شیرابه محل دفن زبالهenergy dispersive spectroscopy - طیف سنجی پراکنده انرژیAdvanced oxidation processes - فرایندهای اکسیداسیون پیشرفتهEDAX - پر خورX-ray diffraction - پراش اشعه ایکسXRD - پراش اشعه ایکسCatalyst - کاتالیستCod - کادوActivated carbon - کربن فعالTotal organic carbon - کل کربن آلی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Landfill leachates contain various refractory contaminants that pose potential threats to the environment and human health. In this study, Cu/Mg/Al-chitosan was synthesized by decorating chitosan with Cu (0.89Â mmol/L), Mg (4Â mmol/L), and Al (2Â mmol/L) using a precipitation method. The catalytic potential of Cu/Mg/Al-chitosan for ozonation of real landfill leachate was examined (CODÂ =Â 40,700Â mg/L; BOD5Â =Â 2100Â mg/L; pH 9.1; BOD5/CODÂ =Â 0.052). A significant catalytic potential of 51% was obtained for chemical oxygen demand (COD) removal in the catalytic ozonation process (COP) with 20Â mg/L of catalyst and a reaction time of 50Â min. The COD removal rate of the COP with Cu/Mg/Al-chitosan was 5.3 and 3.77 times greater than that with the established catalysts activated carbon and MgO, respectively. A pseudo-first order kinetic model fit the heterogeneous decays of ozone the best. The tert-butanol was employed as a radical scavenger in the experiments. GC/MS analysis was used to determine the organic compounds before and after the treatment. Thus, Cu/Mg/Al-chitosan is a promising and affordable catalyst for use in COPs to attenuate the COD of landfill leachates.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Safety and Environmental Protection - Volume 107, April 2017, Pages 227-237
Journal: Process Safety and Environmental Protection - Volume 107, April 2017, Pages 227-237
نویسندگان
Dariush Ranjbar Vakilabadi, Amir Hessam Hassani, Ghasemali Omrani, Bahman Ramavandi,