کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
680486 | 1459973 | 2014 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization and flocculation mechanism of an alkali-activated polysaccharide flocculant from Arthrobacter sp. B4
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The characterization and flocculation mechanism of a bioflocculant produced by Arthrobacter sp. B4 were investigated. The bioflocculant's active ingredient was a polysaccharide (B4-PS) that consisted of three main fractions corresponding to the molecular weights of approximately 3.97Â ÃÂ 104Â Da, 6.84Â ÃÂ 103Â Da and 5.9Â ÃÂ 106Â Da, respectively. These fractions were composed of galactose, glucose, mannose and glucuronic acid. Flocculation experiments showed that B4-PS could spontaneously flocculate in the presence of Ca2+ ions at a high pH (>12.0), followed by the pH reduction to â¼6.0. The self-flocculation of B4-PS may be mediated by ionization and charge neutralization mechanism. Furthermore, B4-PS exhibited excellent capabilities for pollutant removal and pH reduction in alkaline wastewater. These data suggest B4-PS may be a promising tool for use in industrial alkaline wastewater pretreatment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 170, October 2014, Pages 574-577
Journal: Bioresource Technology - Volume 170, October 2014, Pages 574-577
نویسندگان
Yumei Li, Qiang Li, Dakui Hao, Zhiheng Hu, Dongxue Song, Min Yang,