کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6289209 1616309 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Exploring the capacity for anaerobic biodegradation of polycyclic aromatic hydrocarbons and naphthenic acids by microbes from oil-sands-process-affected waters
ترجمه فارسی عنوان
بررسی ظرفیت تجزیه زیستی بی هوازی از هیدروکربن های آروماتیک چند حلقه ای و اسید های نافنیک توسط میکروب ها از آب های آسیب دیده از نفت و شن و ماسه
کلمات کلیدی
هیدروکربن آروماتیک چند حلقه ای، اسیدهای نفتنیک، ماسه های نفت آب های فرآوری شده، زیست تخریب بی هوازی،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست علوم زیست محیطی (عمومی)
چکیده انگلیسی
Both polycyclic aromatic hydrocarbons (PAHs) and naphthenic acids (NAs) are natural components of fossil fuels, but they are also widespread toxic and environmentally persistent pollutants. They are the major cause of environmental toxicity in oil-sands-process waters (OSPW). This study aimed to investigate the anaerobic biodegradation of the PAHs pyrene and 2-methylnaphthalene, and the NAs adamantane-1-carboxylic acid and a “natural” NA mixture (i.e., acid-extractable NAs from OSPW) under sulfate-reducing and methanogenic conditions by a microbial community derived from an oil sands tailings pond. Using gas-chromatography mass spectrometry (GC-MS), the rate of biodegradation was measured in relation to changes in bacterial community composition. Only 2-methylnaphthalene was significantly degraded after 260 days, with significantly more degradation under sulfate-reducing (40%) than methanogenic conditions (25%). During 2-methylnaphthalene biodegradation, a major metabolite was produced and tentatively identified as 2-naphthoic acid. Denaturing gradient gel electrophoresis (DGGE) demonstrated an increase in intensity of bands during the anaerobic biodegradation of 2-methylnaphalene, which derived from species of the genera Fusibacter, Alkaliphilus, Desulfobacterium, Variovorax, Thaurea, and Hydrogenophaga. Despite the biodegradation of 2-methylnaphthalene, this study demonstrates that, under anaerobic conditions, NAs and high-molecular-weight PAHs are the predominant molecules likely to persist in OSPW. Therefore alternative remediation strategies are required.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Biodeterioration & Biodegradation - Volume 108, March 2016, Pages 214-221
نویسندگان
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