کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
684484 889022 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Isolation and characterization of Arthrobacter sp. HY2 capable of degrading a high concentration of p-nitrophenol
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Isolation and characterization of Arthrobacter sp. HY2 capable of degrading a high concentration of p-nitrophenol
چکیده انگلیسی

A soil bacterium strain, capable of using p-nitrophenol (PNP) as its sole source of carbon and energy, was isolated by enrichment on minimal salt medium (MSM). On the basis of a phylogenetic analysis of 16S rRNA gene sequences the bacterium is a species of Arthrobacter, closely related to Arthrobacter ureafaciens DSM 20126. This strain has an unusually high substrate tolerance for PNP degradation in MSM. Greatest degradation of PNP was observed at 30 °C and under slightly alkaline pH (pH 7–9) conditions. Effective degradation rates slowed as the concentration of PNP was increased. Addition of glucose from 0.1% to 0.5% generally enhanced the degradation of PNP at high concentration (400 mg/l) although acidification as a result of glucose metabolism had a negative effect on PNP depletion. Biodegradation of PNP at high concentration was greatly accelerated by β-cyclodextrin at a concentration of 0.5%, indicating that β-cyclodextrin could be a promising addictive for effective PNP bioremediation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 100, Issue 21, November 2009, Pages 5243–5248
نویسندگان
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