کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6359466 1315639 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lab tests on the biodegradation of chemically dispersed oil should consider the rapid dilution that occurs at sea
ترجمه فارسی عنوان
آزمایش آزمایشگاه بر تجزیه بیولوژیکی روغن پراکنده شیمیایی باید رقت سریع که در دریا رخ می دهد را در نظر بگیرد
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات اقیانوس شناسی
چکیده انگلیسی
Most crude oils spread on open water to an average thickness as low as 0.1 mm. The application of dispersants enhances the transport of oil as small droplets into the water column, and when combined with the turbulence of 1 m waves will quickly entrain oil into the top 1 m of the water column, where it rapidly dilutes to concentrations less than 100 ppm. In less than 24 h, the dispersed oil is expected to mix into the top 10 m of the water column and be diluted to concentrations well below 10 ppm, with dilution continuing as time proceeds. Over the multiple weeks that biodegradation takes place, dispersed oil concentrations are expected to be below 1 ppm. Measurements from spills and wave basin studies support these calculations. Published laboratory studies focused on the quantification of contaminant biodegradation rates have used concentrations orders of magnitude greater than this, as it was necessary to ensure the concentrations of hydrocarbons and other chemicals were higher than the detection limits of chemical analysis. However, current analytical methods can quantify individual alkanes and PAHs (and their alkyl homologues) at ppb and ppm levels. To simulate marine biodegradation of dispersed oil at dilute concentrations commonly encountered in the field, laboratory studies should be conducted at similarly low hydrocarbon concentrations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Pollution Bulletin - Volume 73, Issue 1, 15 August 2013, Pages 314-318
نویسندگان
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