کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6973813 | 1453320 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly effective iron-carbon-bentonite-alginate beads (Fe°/C-BABs) as catalyst to treat benzalkonium chloride in fixed-bed column systems
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
Novel iron-carbon-bentonite-alginate beads (Fe°/C-BABs) were successfully prepared with the ion-gelation method and demonstrated high activities in persulfate activation for benzalkonium chloride (BAC) oxidation. The beads were measured in terms of size, mass, and Fe content and then characterized via scanning electron microscopy, energy dispersive spectrometry, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The performance of Fe°/C-BABs as filler was evaluated in a continuous fixed-bed with paralleled PS and BAC feeding. The effects of initial PS (100âmM) concentration, pH (3-11), fixed bead weight (10-30âg), and flow rate (225-540âmL hâ1) were investigated. Results indicated that the Fe°/C-BABs effectively activated PS to treat BAC in the solution. The optimal conditions for the degradation of BAC were pH 7.0, [BAC]â=â50âmg Lâ1, [PS]â=â100âmM, bead weightâ=â30âg, PS flow rateâ=â25âmL hâ1, and BAC flow rateâ=â225âmL hâ1; the removal rate of BAC reached 93.3%.The economic cost analysis was carried out under the optimal experimental conditions. To deeply understand the degradation mechanism of pollutants, the intermediates of BAC degradation were analyzed via gas chromatography/mass spectrometry analysis, and a degradation path pathway was proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Process Safety and Environmental Protection - Volume 119, October 2018, Pages 75-86
Journal: Process Safety and Environmental Protection - Volume 119, October 2018, Pages 75-86
نویسندگان
Bing-huang Wang, Qian Zhang, Jun-ming Hong, Ling Li,