کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6664038 | 1427042 | 2018 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Novel magnetic coffee waste nanocomposite as effective bioadsorbent for Pb(II) removal from aqueous solutions
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, highly abundant coffee waste was taken as a matrix to synthesize a novel magnetic coffee waste (MCW) by dispersing Fe3O4 nanoparticles on its surface via a single pot precipitation method. The potential of MCW to remove Pb (II) from aqueous solution (Pb II) was assessed. The synthesized adsorbent was characterized using XRD, FTIR and SEM-EDX for envisaging the role of surface structures and functional groups in the sorption process. Various operating conditions including effect of Fe3O4-loading, solution pH, contact time, adsorbent dosage, initial Pb (II) concentration and temperature on the sorption of Pb (II) from aqueous solution were studied. The sorption data were fitted using Freundlich, Langmuir, Temkin and Dubinin-Radushkevich (D-R) adsorption models. Langmuir isotherm best fitted the experimental data with R2â¯>â¯0.99 and maximum Pb (II) adsorption capacity of 41.15â¯mg/g at 25â¯Â°C indicating monolayer adsorption. Analysis of kinetic data using pseudo first-order, pseudo second-order and intra-particle diffusion models, revealed that sorption of Pb (II) onto MCW followed pseudo-second order kinetics; demonstrating the chemisorption nature of sorption. Intra-particle diffusion model, clearly depicts that diffusion is not the only rate limiting step in the sorption. Thermodynamic analysis revealed that sorption is endothermic and spontaneous in nature. MCW's showed remarkable potential to be used as an adsorbent for the removal of Pb (II) from aqueous solutions with the advantage of easy separation using magnetic forces.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Chemical Engineering - Volume 6, Issue 2, April 2018, Pages 2390-2400
Journal: Journal of Environmental Chemical Engineering - Volume 6, Issue 2, April 2018, Pages 2390-2400
نویسندگان
Anjali Achazhiyath Edathil, Ismaila Shittu, Jerina Hisham Zain, Fawzi Banat, Mohammad Abu Haija,