کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
686151 889062 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface modification of Corynebacterium glutamicum for enhanced Reactive Red 4 biosorption
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Surface modification of Corynebacterium glutamicum for enhanced Reactive Red 4 biosorption
چکیده انگلیسی

This study reports the possibility of enhancing the reactive dye biosorption capacity of Corynebacterium glutamicum via its cross-linking with polyethylenimine (PEI). The amine groups in the cell wall of C. glutamicum were found to electrostatically interact with reactive dye anions. Thus, cross-linking the biomass with PEI enhanced the primary and secondary amine groups, thereby increased the biosorption of reactive dye. The pH edge experiments revealed that acidic conditions, due to protonation of the amine groups, were found to favor Reactive Red 4 (RR 4) biosorption. According to the Langmuir model, the PEI-modified C. glutamicum recorded a maximum RR 4 uptake capacity of 485.1 mg/g compared to 171.9 mg/g of the raw C. glutamicum. The kinetic experiments revealed that chemical modification decreased the rate of biosorption. Desorption was successful at pH 9, with the biomass successfully regenerated and reused over four cycles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 100, Issue 3, February 2009, Pages 1463–1466
نویسندگان
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