کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5747956 | 1618926 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparative studies of aerobic and anaerobic biodegradation of methylparaben and propylparaben in activated sludge
ترجمه فارسی عنوان
مطالعات تطبیقی زیست تخریب هوازی و بی هوازی متیل پارابن و پروپیل پارابن در لجن فعال
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
متیل پارابن، پروپیل پاراپن، لجن فعال تجزیه زیستی، اسید بنزوئیک
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
چکیده انگلیسی
The biodegradability of two typical parabens (methylparaben and propylparaben) in activated sludge, at initial concentrations of 1 mg Lâ1 or 10 mg Lâ1, was investigated under aerobic and anaerobic conditions. The results showed that microorganisms played a key role in degradation of parabens in WWTPs, especially in aerobic systems. The half-lives of methylparaben and propylparaben under aerobic conditions have been estimated to range between 15.8 and 19.8 min, and benzoic acid was found to be one of the major biodegradation products. The calculated biodegradation efficiency of methylparaben and propylparaben in activated sludge under aerobic conditions was significantly higher than that observed under anaerobic (nitrate, sulfate, and Fe (III) reducing) conditions, as methylparaben and propylparaben exhibited comparatively higher persistence in anaerobic systems, with half-lives â¥43.3 h and â¥8.6 h, respectively. Overall, the results of this study imply that the majority of these parabens can be eliminated by aerobic biodegradation during conventional wastewater treatment processes, whereas minor removal is possible in anaerobic systems if an insufficient hydraulic retention time was maintained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 138, April 2017, Pages 25-31
Journal: Ecotoxicology and Environmental Safety - Volume 138, April 2017, Pages 25-31
نویسندگان
Yang Wu, Qian Sun, Yu-wen Wang, Cheng-xun Deng, Chang-Ping Yu,