کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5142115 | 1496026 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Equilibrium, kinetic and diffusion mechanism of Cr(VI) adsorption onto activated carbon derived from wood apple shell
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In the present investigation, adsorbent activated charcoal was prepared from wood apple shell by chemical activation and used for Cr(VI) removal from aqueous solutions. Powdered wood apple shell was activated by acid H2SO4 and heat treatment in muffle furnace at 600 °C for 2 h. The specific surface area of prepared activated carbon was found to be 1898 m2 gâ1. Batch adsorption studies reveal that the prepared activated charcoal has a significant capacity for adsorption of Cr(VI) from aqueous solutions. The equilibrium adsorption isotherms investigated in this study include Langmuir and Freundlich at 300 K. The Cr(VI) adsorption was found to be maximum (>95.0%) at pH 1.8. Very small amount of adsorbent activated carbon (1.25 g Lâ1) could remove >95.0% Cr(VI) from aqueous solution of initial concentration 75 mg Lâ1. The Langmuir monolayer adsorption capacity of Cr(VI) adsorption on activated carbon was found to be 151.51 mg gâ1. The dimensionless separation factor (RL) signifies a favorable adsorption of Cr(VI) on activated charcoal. Adsorption kinetic studies reveal that the adsorption of Cr(VI) onto activated carbon was pseudo-second order chemisorptions and follows film-diffusion as well as intra-particle pore-diffusion mechanism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Arabian Journal of Chemistry - Volume 10, Supplement 1, February 2017, Pages S252-S260
Journal: Arabian Journal of Chemistry - Volume 10, Supplement 1, February 2017, Pages S252-S260
نویسندگان
Kailas M. Doke, Ejazuddin M. Khan,