کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10603091 | 982436 | 2011 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Removal of anionic dye eosin Y from aqueous solution using ethylenediamine modified chitosan
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, chitosan was cross-linked with ethylenediamine (EDA) to prepare an outstanding sorbent for the removal of anionic dye eosin Y from aqueous solution. FTIR, DTG, XPS and zeta potential analysis were used to characterize the sorbent. The effect of particle size, solution pH, agitation rate, temperature, adsorbent dosage (50-500 mg/L), contact time (10 min-24 h) and initial concentration of dye (50-300 mg/L) on the adsorption process was investigated. Langmuir and Freundlich adsorption models were applied to describe the isotherms and isotherm constants, and the data fitted well with Langmuir model with a maximum adsorption capacity of 294.12 mg/g at 25 °C. Kinetic studies followed the pseudo second-order rate model, which indicated that the chemisorption is the rate-limiting step. Thermodynamic parameters such as enthalpy change (ÎH° = â5.004 kJ/mol), free energy change (ÎG° < 0) and entropy change (ÎS° = â11.656 J/(mol K)) indicate the exothermic and spontaneous nature of adsorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 84, Issue 4, 2 April 2011, Pages 1350-1356
Journal: Carbohydrate Polymers - Volume 84, Issue 4, 2 April 2011, Pages 1350-1356
نویسندگان
Xiao-Yi Huang, Jian-Ping Bin, Huai-Tian Bu, Gang-Biao Jiang, Ming-Hua Zeng,