کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6664011 1427042 2018 42 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Kinetics and mechanistic description of adsorptive uptake of crystal violet dye by lignified elephant grass complexed isolate
ترجمه فارسی عنوان
سینتیک و توصیف مکانیکی جذب رنگ بنفش کریستالی توسط جدایه پیچیده ای از گیاه فیل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
Lignified isolate was successfully synthesized from simulated effluent of modified procedure for bio - ethanol production from elephant grass. The effectiveness of lignin isolate (EA); complexed with Al3+ (Al -EA) and Mn2+ (Mn - EA) for adsorbing aqueous crystal violet dye (CVD) was evaluated. The adsorbents were characterized using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Removal efficiencies of Al k EA (98.42%) and Mn - EA (97.87%) were obtained at contact time of 30 min and 343 K. Kinetic study showed that Brouer - Weron - Sotolongo, Fractal - like mixed 1,2-order and Elovich models were the best three models in describing the adsorption kinetics of both adsorbent. Similarly, the predicted kinetic data were adjured statistically significant using F- test and student's t-test. Application of mechanistic models suggests film diffusion as the rate controlling mechanism. The estimated average thermodynamic parameters (ΔG0 (−18.438 KJ/mol), ΔH0 (+27.968 KJ/mol) and ΔS0 (29.536 KJ/mol)) reveal that CVD adsorption onto Al - EA and Mn - EA was feasible, spontaneous and endothermic.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Chemical Engineering - Volume 6, Issue 2, April 2018, Pages 2105-2118
نویسندگان
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