کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
582472 | 1453164 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The potential of the acetonitrile biodegradation by Mesorhizobium sp. F28
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The potential of the acetonitrile biodegradation by Mesorhizobium sp. F28 The potential of the acetonitrile biodegradation by Mesorhizobium sp. F28](/preview/png/582472.png)
چکیده انگلیسی
Mesorhizobium sp. F28 was used in the NHase/amidase enzyme system to convert acetonitrile into acetamide and acetic acid, and the cells grew with the production of acetic acid. The NHase activity of the strain F28 was 78Â UÂ mgâ1Â dcw, observed in the conversion of 19.5Â mM acetonitrile at 0.2Â h. As the initial pH value was between 6.5 and 8.3, 18.3Â mM acetonitrile completely converted into acetamide within 2Â h and the accumulation of acetamide subsequently converted into acetic acid and ammonia within 46Â h. When 20.3Â mM acetamide was added in the medium, the conversion rate of acetonitrile was 80% at 2Â h and the conversion rate of the accumulative acetamide was slightly affected. The concentrations of acetic acid and ammonia were respectively 6.01 and 6.68Â mM at 46Â h. The addition of acetic acid decreased the activities of the NHase and amidase. The conversion rate of acetonitrile was 94% at 9.5Â h and traces of acetic acid (0.25Â mM) and ammonia (0.29Â mM) were produced. The effects of product-inhibition indicated that the appropriate operation of bioreactor would be beneficial for Mesorizobium sp. F28 to degrade acetonitrile continuously.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 164, Issues 2â3, 30 May 2009, Pages 646-650
Journal: Journal of Hazardous Materials - Volume 164, Issues 2â3, 30 May 2009, Pages 646-650
نویسندگان
Yun-Shu Feng, Chi-Mei Lee,