کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7841836 1506504 2018 54 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced methylene blue adsorption onto activated reed-derived biochar by tannic acid
ترجمه فارسی عنوان
جذب متیلن آبی پیشرفته بر زیست چای مشتق شده از سرخ شده با اسید تانن افزایش یافته است
کلمات کلیدی
بیوشار مشتق شده از رید، فعال سازی متیلن آبی، مکانیزم جذب، اسید تانیک، تعامل الکترواستاتیک،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
This study investigated the effect of tannic acid (TA) on the adsorption efficiency of activated biochar (ABC) prepared from reed biomass regarding the removal of methylene blue (MB) from aqueous solution. The structure and chemical properties of the obtained ABC adsorbent were characterized by XRD, FTIR, N2 adsorption-desorption isotherms, and scanning electron microscopy. After the HNO3 activation of the original biochar (BC), the well-developed porous surface structure of ABC was observed with a considerable increase in the specific surface area. The adsorption behavior of MB onto ABC was determined with the presence of TA (pre-loading versus co-introduction with solute). Results demonstrated that the removal of MB was promoted in the presence of TA solutions with pH ranging from 4.0 to 8.0, and an increase of the initial concentration of TA (from 10 to 50 mg/L) caused a more pronounced promotion effect. The adsorption of MB onto ABC followed the Elovich kinetic model, suggesting a heterogeneous multilayer adsorption process. The adsorption data were best described by the Sips isotherm model, showing a maximum adsorption amount of 77.35 mg/g in the presence of TA, which was much higher than many reported adsorbents. The adsorption mechanism appeared to be related to electrostatic interaction, hydrogen bonding, ion exchange, n-π/π-π interaction, etc. Findings of the present work highlighted the positive effect of TA on the adsorptive removal of MB by ABC, and were also beneficial for developing reed-derived biochar as an engineered absorbent for removal of toxic dyes from aqueous solution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 268, 15 October 2018, Pages 658-666
نویسندگان
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