کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11009907 | 1815034 | 2019 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of a bioflocculant by using acetonitrile as sole nitrogen source and its application in heavy metals removal
ترجمه فارسی عنوان
آماده سازی یک بیو فلکولانت با استفاده از استونیتریل به عنوان منبع نیتروژن تنها و کاربرد آن در حذف فلزات سنگین
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
چکیده انگلیسی
A novel bioflocculant, A-GS408, produced by Klebsiella oxytoca GS-4-08 cultured in acetonitrile (ACN) as sole nitrogen source was investigated in this study. A complete degradation of 1âg lâ1 of ACN was achieved in 350âh, and 4.6âg of crude A-GS408 can be obtained in one litter of synthetic medium. The as-prepared bioflocculant exhibits good flocculation efficiency (over 90%) toward Kaolin solution with the aid of Fe3+. Chemical analysis showed that the bioflocculant was mainly composed of polysaccharides (46.3%) and proteins (20.6%). FTIR and XPS results indicated the abundant carboxyl, amine and hydroxyl groups in A-GS408âs, which play an important role on Pd2+ and Cu2+ adsorption. The adsorption of heavy metals can be well stimulated by Freundlich isotherm equation, and the Kf was up to 439.2âmg1-1/n l1/nâgâ1 and 112.2âmg1-1/n l1/nâgâ1 for Pb2+ and Cu2+, respectively. The kinetic fitting results proved that the adsorption of heavy metals by A-GS408 was chemisorption. This study may provide a new method for preparation of bioflocculant, which can not only degrade toxic compound i.e., acetonitrile, but also can reuse considerable nitrogen source from nitrile-containing wastewater.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 363, 5 February 2019, Pages 242-247
Journal: Journal of Hazardous Materials - Volume 363, 5 February 2019, Pages 242-247
نویسندگان
Hong-cheng Fan, Jing Yu, Rong-ping Chen, Lei Yu,