کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9442172 1301778 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Laboratory study on the bioremediation of petrochemical sludge-contaminated soil
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست علوم زیست محیطی (عمومی)
پیش نمایش صفحه اول مقاله
Laboratory study on the bioremediation of petrochemical sludge-contaminated soil
چکیده انگلیسی
This study evaluated by biological and chemical analyses the effectiveness of bioremediation of sludge from the petrochemical industry in systems containing artificially contaminated soil. The sludge-soil systems were prepared with three different initial concentrations of sludge, and during bioremediation 86-95% of the hydrocarbons was eliminated. Simultaneously, soil bacterial populations and inhibition of seed germination by aqueous extracts increased in all sludge-soil systems during the first 180 days of treatment. After 1 year of bioremediation, a loss in the catabolic capacity of the Gram-negative bacterial population was observed, but was not dependent on the initial sludge concentration. Furthermore, residual levels of hydrocarbons and seed germination inhibitory effect decreased sharply, but some level of toxicity remained in the systems containing the highest initial sludge concentration. Independent of the initial sludge concentration, the contaminated soils did not re-establish their original features even when residual hydrocarbon concentrations suggested the end of the process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Biodeterioration & Biodegradation - Volume 55, Issue 4, June 2005, Pages 271-278
نویسندگان
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