کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4415574 1307751 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of a simple bacterial consortium for effective treatment of wastewaters with reactive dyes and Cr(VI)
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Characterization of a simple bacterial consortium for effective treatment of wastewaters with reactive dyes and Cr(VI)
چکیده انگلیسی

A microbial consortia consisting of three bacteria isolated from tanning and textile wastewaters revealed high capacity to simultaneously bioaccumulate dye and Cr(VI). The identity of the bacteria were determined by 16S rRNA gene analysis to be closely related to Ochrobactrium sp., Salmonella enterica and Pseudomonas aeruginosa. Dependence of initial pH values and range of concentrations of the dye Reactive Black B (33.2–103.1 mg l−1) and Cr(VI) (19.9–127.6 mg l−1) were examined to find the effect of pH on the dye and Cr(VI) bioaccumulation. Optimal pH for growth of the consortia in media containing 35 mg l−1 dye and 50 mg l−1 Cr(VI) was determined to be around 8. The Cr(VI) bioaccumulation by the consortia was rapid in media containing molasses with or without reactive dye with a maximum Cr(VI) bioaccumulation yield ranging from 90% to 99% within a 2–4 d period. A slightly lower yield for the dye bioaccumulation was measured with a maximum dye bioaccumulation of 80% at 59.3 mg l−1 dye and 69.8 mg l−1 Cr(VI). The highest specific Cr uptake value was obtained as 76.7 mg g−1 at 117.1 mg l−1 Cr(VI) and 50.8 mg l−1 dye concentration. This ability to bioaccumulate dye and Cr(VI) was more efficient than the enriched sludge from which they were isolated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 67, Issue 4, March 2007, Pages 826–831
نویسندگان
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