کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8332158 | 1540246 | 2015 | 45 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Adsorption of chromium from aqueous solutions using crosslinked chitosan-diethylenetriaminepentaacetic acid
ترجمه فارسی عنوان
جذب کروم از محلول های آبی با استفاده از کیتوزان-دی اتیلنتریمین پنتوساتیک
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کلمات کلیدی
جذب، کیتوزان، دی اتیلنتریامین پنتا اسیدهای اسید، فاضلاب کروم،
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
چکیده انگلیسی
Chitosan (CH) and its derivatives have been the focus of attention for researchers as potential adsorbents for heavy metal removal. The adsorption potential of chitosan cross-linked with diethylenetriaminepentaacetic acid (CD) for Cr6+ was investigated. CD was characterized by FTIR, XRD, TGA, XPS and ESR techniques. Batch experiments were conducted to optimize the parameters affecting the adsorption of chromium. The optimum pH was found to be 3 and the adsorption process was found to be exothermic. Adsorption isotherms were determined and the maximum adsorption capacity of CD for chromium was found to be 192.3Â mg/g which was higher than the adsorption capacity of the adsorbents reported in literature. The thermodynamic parameters, such as Gibbs free energy, changes in enthalpy and changes in entropy change were also evaluated. XPS and ESR studies revealed that Cr6+ adsorbed onto CD was reduced to Cr3+. The efficacy of CD for removal of Cr6+ from chrome plating effluent was demonstrated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Biological Macromolecules - Volume 74, March 2015, Pages 458-466
Journal: International Journal of Biological Macromolecules - Volume 74, March 2015, Pages 458-466
نویسندگان
Ronak Bhatt, B. Sreedhar, P. Padmaja,