کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9451554 | 1307828 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of surfactant and temperature on biotransformation kinetics of anthracene and pyrene
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effects of surfactant and temperature on biotransformation kinetics of anthracene and pyrene Effects of surfactant and temperature on biotransformation kinetics of anthracene and pyrene](/preview/png/9451554.png)
چکیده انگلیسی
The biotransformation and mineralization of a mixture of two polycyclic aromatic hydrocarbons (PAHs), anthracene and pyrene, which are known contaminants of soil and groundwater, by an enrichment culture in the presence or absence of 100 mg lâ1 Tergitol NP-10, a non-ionic surfactant, and at temperatures of 10 °C and 25 °C were investigated. The overall biotransformation of 2 mg lâ1 total PAHs with free cell suspensions in batch culture was greater than 97.2% at both examined temperatures. At 25 °C, the overall mineralization of anthracene was 48.8% and that of pyrene was 66.1%. However, the decrease of temperature to 10 °C had a negative effect on the mineralization of PAHs and reduced it to 18.5% and 61.5% for anthracene and pyrene, respectively. Using a higher PAHs concentration of 20 mg lâ1 at 25 °C, the overall biotransformation of anthracene was 80.7% and that of pyrene was 100%, where only 17.3% anthracene and 7.6% pyrene were mineralized to carbon dioxide and water. The addition of surfactant at 25 °C increased the overall mineralization of anthracene and pyrene to 33.0% and 27.6%, respectively. However, the addition of surfactant at 10 °C had a negative impact on the overall biotransformation of anthracene and pyrene, reducing them to 20.6% and 14.0%, respectively. These results have significant implications in the bioremediation of PAHs-contaminated sites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 61, Issue 7, November 2005, Pages 1042-1050
Journal: Chemosphere - Volume 61, Issue 7, November 2005, Pages 1042-1050
نویسندگان
Catherine Sartoros, Laleh Yerushalmi, Patrick Béron, Serge R. Guiot,