کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
575434 | 1453052 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pretreatment of ultra-high concentrated wastewater from phthalonitrile resin manufacturing by chemical precipitation, reduction and oxidation
ترجمه فارسی عنوان
پیش پردازش پسابهای با غلظت زیاد بالا از تولید رزین فتالونیتیلیل توسط رسوبات شیمیایی، کاهش و اکسیداسیون
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
چکیده انگلیسی
To remove the toxic and refractory pollutants in the phthalonitrile resin wastewater and improve its biodegradability, a combined process (i.e., CaCl2 + AA + Fe/Cu/air) was developed to pretreat this wastewater obtained from a phthalonitrile resin manufacturing plant in southwestern China. First, CO32â was precipitated and removed by adding CaCl2. Furthermore, its ultra-high concentrated NO2â (22.7 ± 0.1 g/L) was reduced into N2 by adding amidosulphonic acid (AA). Meanwhile, two control experiments were setup to confirm the superiority of the combined process (i.e., CaCl2 + AA). Subsequently, the wastewater was further treated by Fe/Cu/air process after the removal of CO32â and NO2â. The results suggest that the developed method not only could effectively remove the ultra-high concentrated CO32â (ï¼99%) and NO2â (ï¼99%), but also could obtain high COD (58.8%) and colority (95.2%) removal efficiencies. Meanwhile, B/C ratio of this wastewater increased from 0.19 to 0.45, which suggests the biodegradability also was improved significantly. Finally, the high treatment efficiency was mainly attributed to the synergistic effects of CaCl2, AA and Fe/Cu/air. Therefore, the combined process is a promising pretreatment process for the ultra-high concentrated wastewater from phthalonitrile resin manufacturing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 308, 5 May 2016, Pages 276-284
Journal: Journal of Hazardous Materials - Volume 308, 5 May 2016, Pages 276-284
نویسندگان
Qingqing Ji, Yue Yuan, Bo Lai, Ping Yang, Yuexi Zhou,