کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1744738 | 1522160 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical regeneration of spent powdered activated carbon used in decolorization of sodium salicylate for the pharmaceutical industry
ترجمه فارسی عنوان
بازسازی شیمیایی کربن فعال پودر مصرف شده در رنگ آمیزی سدیم سالیسیلات برای صنایع دارویی
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کلمات کلیدی
کربن فعال، بازسازی شیمیایی، اسپکتروفتومتری رنگ زدایی، سدیم سالیسیلات،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
The purpose of this work was to regenerate spent powered activated carbon (PAC) which was exhausted in the decolorization of sodium salicylate (NaSA) liquor. In this research, a facile procedure of chemical regeneration was performed and a simple and accurate spectrophotometric method was applied. In order to obtain the optimal operation conditions, influences of following parameters were verified: soaking time, heating temperature, acid concentration and reaction time. PAC was also characterized by thermogravimetric analysis (TGA) to investigate the adsorbate-adsorbent interactions and their dependences on temperature. The optimal conditions for PAC regeneration were as follows: NaOH (1 M) soaking time of 1 h, H2SO4 concentration of 0.31 mol Lâ1 and agitating at 95 °C for 1 h. The peaks of derivative thermogravimetric (DTG) pyrolysis profiles of exhausted PAC appeared at low temperatures (â¼180 °C and â¼260 °C), which demonstrated the adsorption of colored contaminants was a weak physisorption. In pilot plant experiments, it was found that after four consecutive adsorption-regeneration cycles, the adsorption capacity of PAC was maintained at high levels, even higher than virgin PAC. Therefore, this method was very simple, economical and had successfully applied in industrial scale.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cleaner Production - Volume 86, 1 January 2015, Pages 424-431
Journal: Journal of Cleaner Production - Volume 86, 1 January 2015, Pages 424-431
نویسندگان
Qimeng Li, Yanshan Qi, Canzhu Gao,