کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5740490 1616298 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Anaerobic degradation of atrazine
ترجمه فارسی عنوان
تخریب بی هوازی آترازین
کلمات کلیدی
آراازین، تجزیه زیستی، شرایط کاهش سولفات، شرایط کاهش نیترات، معدنی شدن، راکتور مایع خاک،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست علوم زیست محیطی (عمومی)
چکیده انگلیسی


- Anaerobic degradation of atrazine was studied.
- Atrazine was degraded under sulfate reducing conditions.
- A lab scale soil slurry reactor was demonstrated for the removal of atrazine from the contaminated soil.

Atrazine (2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine) is the most frequently used herbicide in U.S. agricultural crop production. Unfortunately, the heavy use of this herbicide has contaminated soil, sediments, and aquatic ecosystems. Anaerobic degradation of atrazine was studied under sulfate and nitrate-reducing conditions using enrichment cultures developed from an atrazine contaminated soil. The soil samples were enriched using mineral salt media with either nitrate or sulfate as electron acceptors in the presence of atrazine under strict anaerobic conditions. The enriched samples were experimented with atrazine as either the sole source of carbon or nitrogen and also under co-metabolic conditions with molasses as co-substrate. The results revealed that atrazine was removed under both electron acceptor conditions. However, the atrazine degradation efficiency was significantly higher under sulfate reducing conditions than the nitrate reducing conditions. Under sulfate reducing conditions, atrazine removal was faster when molasses was used as co-substrate. The metabolic analysis showed that atrazine was mineralized and the major metabolites observed include hydroxy atrazine, cyanuric acid, chloride, and ammonium. A soil slurry reactor with atrazine contaminated soil showed more than 99% removal of atrazine within 70 days of incubation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Biodeterioration & Biodegradation - Volume 119, April 2017, Pages 626-630
نویسندگان
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