کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4364284 1616311 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
r-strategist versus K-strategist for the application in bioremediation of hydrocarbon-contaminated soils
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست علوم زیست محیطی (عمومی)
پیش نمایش صفحه اول مقاله
r-strategist versus K-strategist for the application in bioremediation of hydrocarbon-contaminated soils
چکیده انگلیسی


• Strain IN53 and consortium reduced TPH to an equivalent extent in both soils.
• Their degradative effects were stronger than the actions of Acinetobacter sp. IN47.
• Treatments by the consortium and the K-strategist showed more intense actions.
• FISH showed better adaptation of the K-strategist than Acinetobacter sp. IN47.
• The strains did not cooperate during hydrocarbon removal or compete with each other.

A laboratory study was undertaken to determine the degradative potentials of the pure bacterial strains Mycobacterium frederiksbergense IN53 (Actinobacteria, a K-strategist) and Acinetobacter sp. IN47 (Gammaproteobacteria, an r-strategist) as well as a combination of these strains under harsh environmental conditions (high hydrocarbon load: 50,883 and 46,682 mg kg−1 dry weight of soil for non-sterile and sterile soil samples, respectively; moisture content lower than 20%). A decrease in total petroleum hydrocarbons (TPH) and the activity of soil enzymes (dehydrogenase and lipase) indicated that the effects of M. frederiksbergense IN53 and the consortium were equivalent. However, these two microbial treatments showed significantly better degradative actions than Acinetobacter sp. IN47. Similar biodegradation yields were observed in sterile and non-sterile soil samples. These results suggest that bioaugmentation with M. frederiksbergense IN53 (K-strategist) provides a better approach for the treatment of hydrocarbon-contaminated sites in which the optimum remediation bioprocess conditions are difficult to maintain.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Biodeterioration & Biodegradation - Volume 106, January 2016, Pages 41–52
نویسندگان
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