کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4979744 1453038 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Degradation of nitro-aromatic explosives using recyclable magnetic photocatalyst: Catalyst synthesis and process optimization
ترجمه فارسی عنوان
تجزیه مواد منفجره نیترو-معطر با استفاده از فوتوکاتالیست مغناطیسی قابل بازیافت: سنتز کاتالیست و بهینه سازی فرایند
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
چکیده انگلیسی


- Synthesis of a recyclable magnetic Titania nanoparticle with diameter of 22 nm.
- Modeling and optimization of the PNP degradation by photocatalytic method.
- Evaluation of kinetic, electrical energy consumption, and electrical energy cost.
- Study of redwater salts effect on the PNP degradation and redwater mineralization.

In this research, degradation of P-Nitrophenol (PNP) as a model nitro-aromatic compound was carried out by photocatalytic process using magnetic Titania nano particles (MTNPs). The recyclable MTNPs were synthesized with average diameter of 22 nm and a narrow size distribution. The process was modeled and optimized by a second order reduced polynomial model. Based on the model prediction, the process can be degraded PNP up to 90% under the optimum conditions of the initial pH = 4, [PNP] = 15 mg L−1, [MTNPs] = 85 mg L−1, and T = 25 °C. PNP mineralization was obtained 69%, at the optimum condition after 120 min of the process. The process kinetic was well fitted by pseudo first order kinetic model and electrical energy consumption of the process was obtained about 177.8 kWh/m3. Furthermore, the effect of sodium sulfite, sodium sulfate and sodium nitrite on the photocatalytic degradation process was assessed. The results showed that sulfite or sulfate ions decrease and nitrite ions increase the process efficiency. Also, a sample of redwater as a nitro-aromatic effluent was treated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 325, 5 March 2017, Pages 310-318
نویسندگان
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