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
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Removal of anionic dye eosin Y from aqueous solution using ethylenediamine modified chitosan
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 (ΔH° = −5.004 kJ/mol), free energy change (ΔG° < 0) and entropy change (ΔS° = −11.656 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
نویسندگان
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