کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5116901 1485225 2017 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Removal of vanadium from industrial wastewater using iron sorbents in batch and continuous flow pilot systems
ترجمه فارسی عنوان
حذف وانادیوم از فاضلاب صنعتی با استفاده از جاذب های آهن در سیستم های پویا و پیوسته جریان
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی


- Ferric oxyhydroxide removed vanadium from industrial wastewater most efficiently.
- Ferric oxyhydroxide transformed into hematite and goethite in the pilot study.
- Leaching of impurities occurred but subsequently good quality effluent was obtained.

This study investigated the removal of vanadium from real industrial wastewater by using six iron materials: commercial iron sorbent (CFH-12), commercial mineral sorbent (AQM), blast furnace sludge (BFS), steel converter sludge (SCS), ferrochrome slag (FeCr) and slag from a steel foundry (OKTO). Batch tests revealed that CFH-12 (ferric oxyhydroxide) removed vanadium most efficiently, which was explained by its high iron content and the amorphous form of the iron, and that the sorption followed the Langmuir isotherm. With a dosage of 10 g/l and an initial vanadium concentration of 58.2 mg/l, 91-94% removal rates for vanadium were achieved in the studied pH range (3-9). Other sorbents showed significantly lower efficiency than CFH-12, with the exception of BFS at acidic pH (93%). Based on the batch test results, CFH-12 was selected for a pilot study made on site. The pilot study demonstrated the feasibility of CFH-12 to remove vanadium at high temperature (80 °C) from concentrated industrial wastewater with fluctuating water quality (vanadium concentration varied from 51 to 83 mg/l, pH about 9 (at 25 °C)). Leaching of impurities (mainly S, Ca, Mg and K) into the effluent occurred during the first day, but subsequently good quality effluent was produced (e.g. <0.1 mg/l V). During the pilot study, the amorphous iron material of CFH-12 was crystallized into a hematite-like phase (Fe1.67 H0.99 O3), and goethite (FeO(OH)) with a higher average pore diameter, probably due to the hot process conditions to which CFH-12 was exposed for over five days.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Management - Volume 190, 1 April 2017, Pages 231-242
نویسندگان
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