Adsorption of acid dye onto activated carbons prepared from agricultural waste bagasse by ZnCl2 activation

被引:319
作者
Tsai, WT [1 ]
Chang, CY
Lin, MC
Chien, SF
Sun, HF
Hsieh, MF
机构
[1] Chia Nan Univ Pharm & Sci, Dept Environm Engn & Hlth, Tainan 717, Taiwan
[2] Natl Taiwan Univ, Grad Inst Environm Engn, Taipei 106, Taiwan
关键词
activated carbon; sugarcane bagasse; acid dye; isotherm;
D O I
10.1016/S0045-6535(01)00016-9
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A series of activated carbons were prepared from agricultural waste sugarcane bagasse by chemical activation with zinc chloride (ZnCl2) as an activating agent at 500 degreesC and 0.5 It soaking time. The Langmuir surface area and total pore volume were used to estimate the average pore diameter of the carbon products. The values of the surface area and pore volume increased linearly with increase in the impregnation ratio (IR) up to 100 wt%. The adsorption capacities of the derived adsorbents for Acid Orange 10 were measured at 20 degreesC and 40 degreesC to gain further insights into the acidic surface oxides of the adsorbent from the results of Fourier transform infrared (FTIR) spectroscopy analysis and pH measurement. Adsorption isotherms of the acid dye on adsorbents prepared were determined and correlated with common isotherm equations. It was found that the Langmuir model appears to fit the isotherm data better than the Freundlich model. The physical properties of these adsorbents were consistent with the parameters obtained from the isotherm equations. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:51 / 58
页数:8
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