کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
575912 1453061 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced azo dye removal in a continuously operated up-flow anaerobic filter packed with henna plant biomass
ترجمه فارسی عنوان
بهبود رنگ آمیزی آزو در یک فیلتر بی هوازی با جریان ثابت که با زیست توده گیاهان حنا بسته بندی شده است
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
چکیده انگلیسی
Effects of henna plant biomass (stem) packed in an up-flow anaerobic bio-filter (UAF) on an azo dye (AO7) removal were investigated. AO7 removal, sulfanilic acid (SA) formation, and pseudo first-order kinetic constants for these reactions (kAO7 and kSA) were higher in the henna-added UAF (R2) than in the control UAF without henna (R1). The maximum kAO7 in R1 and R2 were 0.0345 and 0.2024 cm−1, respectively, on day 18; the corresponding molar ratios of SA formation to AO7 removal were 0.582 and 0.990. Adsorption and endogenous bio-reduction were the main AO7 removal pathways in R1, while in R2 bio-reduction was the dominant. Organics in henna could be released and fermented to volatile fatty acids, acting as effective electron donors for AO7 reduction, which was accelerated by soluble and/or fixed lawsone. Afterwards, the removal process weakened over time, indicating the demand of electron donation and lawsone-releasing during the long-term operation of UAF.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 299, 15 December 2015, Pages 158-164
نویسندگان
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