Kinetics and Isotherm Studies of Methylene Blue Adsorption on Activated Carbon Derived from Chrysanthemum: Solid Waste of Beverage Industry

被引：0

作者：

Rattanet C. ^{[1
]}

Knijnenburg J.T.N. ^{[2
]}

Ngernyen Y. ^{[1
]}

机构：

[1] Biomass & Bioenergy Research Laboratory, Department of Chemical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen

[2] Biodiversity and Environmental Management Division, International College, Khon Kaen University, Khon Kaen

来源：

Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy | 2022年 / 101卷 / 07期

关键词：

Activated carbon; Adsorption; Chemical activation; Chrysanthemum; Methylene blue;

D O I：

10.3775/jie.101.122

中图分类号：

学科分类号：

摘要：

Chrysanthemum, a solid waste from beverage industry, was used as a raw material for the preparation of activated carbon through chemical activation with zinc chloride (ZnCl2), phosphoric acid (H3PO4) and ferric chloride (FeCl3). Briefly, the raw material was soaked in solutions of each chemical agent with ratio of 1:2 by weight for different times (1, 6, 12, and 24 h) and then carbonized at 500 °C for 1 h. The obtained activated carbons were characterized for their surface area and porosity by nitrogen gas adsorption at -196 °C. The highest surface area of 728 m2/g and total pore volume of 0.48 cm3/g were obtained from chrysanthemum activated with ZnCl2 for a soaking time of 24 h. The activated carbon with the highest surface area was then characterized for other physicochemical properties and used for the adsorption of methylene blue (MB). The effects of contact time and initial MB concentration were investigated in batch mode. The equilibrium adsorption time was 60 min and the adsorption data followed the pseudo-second order kinetics. The adsorption isotherm was best described by the Langmuir model. The maximum monolayer adsorption capacity of activated carbon prepared from chrysanthemum for MB was 491.0 mg/g, which is higher than activated carbons prepared from other biomasses using chemical activation. Therefore, chrysanthemum-based activated carbon could be used as alternative adsorbent for MB adsorption from waste effluents. © 2022 Japan Institute of Energy. All rights reserved.

引用

页码：122 / 131

页数：9

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