کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
582885 | 1453171 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sequestration of chromium by exopolysaccharides of Nostoc and Gloeocapsa from dilute aqueous solutions
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Sequestration of chromium by exopolysaccharides of Nostoc and Gloeocapsa from dilute aqueous solutions Sequestration of chromium by exopolysaccharides of Nostoc and Gloeocapsa from dilute aqueous solutions](/preview/png/582885.png)
چکیده انگلیسی
This article reports the chromium removal potential of exopolysaccharides (EPS) of two indigenously isolated cyanobacterial strains, Gloeocapsa calcarea and Nostoc punctiforme. The biosorption was studied by varying pH from 2 to 6 and initial chromium concentration from 5 to 20Â mg/L to find out the optimized conditions for maximum chromium removal by EPS. Two equilibrium models, Langmuir and Freundlich, were used to explain these results. The Freundlich model was found to be better applicable to the experimental data as compared to Langmuir as inferred from high value of coefficient of determination whereas the optimal conditions were found to be same for the two (pH 2 and initial chromium concentration 20Â mg/L). EPS production by the two strains was also studied which was found to be higher for Gloeocapsa. On the basis of experimental results and model parameters, it can be inferred that the EPS extracted from Nostoc has comparatively high biosorption capacity and can be utilized for the removal of chromium from dilute aqueous solution. Adsorption of chromium on EPS was further confirmed by surface morphology observed in scanning electron micrographs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 157, Issues 2â3, 15 September 2008, Pages 315-318
Journal: Journal of Hazardous Materials - Volume 157, Issues 2â3, 15 September 2008, Pages 315-318
نویسندگان
Mona Sharma, Anubha Kaushik, Somvir Somvir, Kiran Bala, Anjana Kamra,