Intraparticle diffusion processes during acid dye adsorption onto chitosan
Intraparticle diffusion processes during acid dye adsorption onto chitosan
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DOI：
10.1016/j.biortech.2006.09.045
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发表时间：
2007-11-01
影响因子：
11.4
通讯作者：
McKay, G.
中科院分区：
文献类型：
--
作者：
Cheung, W. H.;Szeto, Y. S.;McKay, G.
研究了壳聚糖对5种酸性染料的吸附性能。根据Langmuir分析，其对橙10(AO10)、酸性橙12(AO12)、酸性红18(AR18)、酸性红73(AR73)和酸性绿25(AG25)的平衡容量分别为1.54、2.66、1.11、1.25和1.03 mmol/g壳聚糖。根据染料吸附与时间的平方根曲线得出的颗粒内扩散速率参数对五个体系的批量吸附速率表明，吸附机理主要是颗粒内扩散，但当染料分别通过大孔、中孔和微孔扩散时，也与孔大小有关。(C)2006爱思唯尔有限公司。保留所有权利。
The adsorption of five acid dyes onto chitosan was studied. The equilibrium capacities based on the Langmuir analysis were 1.54, 2.66, 1.11, 1.25 and 1.03mmol/g chitosan for Orange 10 (AO10), Acid Orange 12 (AO12), Acid Red 18 (AR18), Acid Red 73 (AR73) and Acid Green 25 (AG25) respectively. The batch adsorption rate for the five systems based on an intraparticle diffusion rate parameter derived from the plots of dye adsorbed versus the square root of time indicated that the adsorption mechanism was predominantly intraparticle diffusion but there was also a dependence on pore size as the dye diffuses through macropore, mesopore and micropore respectively. (C) 2006 Elsevier Ltd. All rights reserved.