کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6308732 | 1618860 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photochemical degradation of Corexit components in ocean water
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کلمات کلیدی
DOC1O2DOSSCorexitSUVA254RISOil spill - آلودگی نفتیSinglet oxygen - اکسیژن مجزاMolar absorptivity - جذب مولرMoss - خزه dioctyl sodium sulfosuccinate - دی سکتیل سدیم سولفوسوکیناتHydroxyl radical - رادیکال هیدروکسیلApparent quantum yield - عملکرد کوانتومی ظاهریPhotochemistry - فتوشیمی یا نورشیمی pho - فوDOM - قضاوتDissolved organic matter - ماده آلی حل شدهReactive intermediates - واسطه های واکنشیDispersants - پراکندهDissolved organic carbon - کربن آلی حل شده
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Photochemical degradation of Corexit components in ocean water Photochemical degradation of Corexit components in ocean water](/preview/png/6308732.png)
چکیده انگلیسی
Due to the large quantities of dispersants used during the Deepwater Horizon spill in 2010, there were immediate concerns with regards to the fate and transport of the mixture in ocean waters. Direct and sensitized photolysis experiments were carried out for two compounds chosen as surrogates for the Corexit mixture (9500 and 9527) that were applied to surface waters during the oil spill in the Gulf of Mexico. The results showed that direct photolysis did not contribute significantly to the overall degradation (max â¼30%), therefore the focus shifted to sensitized photolysis, specifically the degradation stemming from the reaction rate with hydroxyl radical (HO). The direct photochemical degradation rates for two of the compounds, dioctyl sulfosuccinate (DOSS) and dipropylene glycol butyl ether (DGBE) were measured as 4.29Â ÃÂ 10â6Â sâ1 and 5.95Â ÃÂ 10â6Â sâ1, respectively; whereas the overall degradation rate in ocean water was 1.56Â ÃÂ 10â5Â sâ1 and 2.23Â ÃÂ 10â5Â sâ1. The formation rates and apparent quantum yields for HO formation were determined for six ocean water samples. The values ranged from 1.81Â ÃÂ 10â5 near shore to 0.061Â ÃÂ 10â5 for the open ocean. These degradation rates suggest the possibility for photolysis to play a role in the overall fate of Corexit.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 111, September 2014, Pages 596-602
Journal: Chemosphere - Volume 111, September 2014, Pages 596-602
نویسندگان
Caitlin M. Glover, Stephen P. Mezyk, Karl G. Linden, Fernando L. Rosario-Ortiz,