کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4365713 1301773 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biodegradation of organochlorine pesticides by bacteria grown in microniches of the porous structure of green bean coffee
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست علوم زیست محیطی (عمومی)
پیش نمایش صفحه اول مقاله
Biodegradation of organochlorine pesticides by bacteria grown in microniches of the porous structure of green bean coffee
چکیده انگلیسی

In this paper, the authors propose a model for DDT biodegradation by bacteria grown in microniches created in the porous structure of green bean coffee. Five bacteria isolated from coffee beans, identified as Pseudomonas aeruginosa, P. putida, Stenotrophomonas maltophilia, Flavimonas oryzihabitans, and Morganella morganii. P. aeruginosa and F. oryzihabitans, were selected for pesticide degradation. Bacteria were selected according to their ability to grow on mineral media amended with: (a) glucose (10 g l−1), (b) peptone (2 g l−1), and (c) ground coffee beans (2 g l−1). These three media were supplemented with 50 mg l−1 of 1,1,1-trichloro-2,2-bis (4-chlorophenyl) ethane (DDT) and endosulfan. GC/MS analysis demonstrated that the greatest DDT removal was obtained in the medium supplemented with coffee beans, where 1,1-dichloro-2,2′-bis (4-chlorophenyl)ethylene (DDE), 1-chloro-2,2-bis (4-chlorophenyl) ethane (DDMU) and 2,2′-bis (p-chlorophenyl)ethanol (DDOH) were detected. DDMU is a product of the reductive dechlorination of DDE, which in this system could be carried out under the anaerobic conditions in microniches present in the porous structure of the coffee bean. This was supported by scanning electron microscopy. Green bean coffee could be used as a nutrient source and as a support for bacterial growth in pesticide degradation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Biodeterioration & Biodegradation - Volume 59, Issue 3, April 2007, Pages 239–244
نویسندگان
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