Kinetic studies on sorption of Cr(VI) and Cu(II) ions by chitin, chitosan and Rhizopus arrhizus

被引:256
作者
Sag, Y [1 ]
Aktay, Y [1 ]
机构
[1] Hacettepe Univ, Fac Engn, Dept Chem Engn, TR-06532 Ankara, Turkey
关键词
sorption; Cr(VI)-Cu(II); chitin; chitosan; Rhizopus arrhizus; kinetic models;
D O I
10.1016/S1369-703X(02)00068-2
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
This work focuses on Cr(VI), Cu(II) sorption kinetics by chitin, a naturally occurring material, chitosan, the deacetylated form of chitin, and Rhizopus arrhizus, a filamentous fungus containing chitin and chitosan as a main cell wall component. The aim of this study is to understand the mechanisms that govern Cr(VI) and Cu(II) removal, and find an appropriate model for the kinetics of removal in a batch reactor. In order to investigate the mechanism of sorption and potential rate controlling steps, the pseudo-first, first, pseudo-second order kinetic models and the Elovich equation have been used to test experimental data. For all of the metal-biosorbent systems studied, the pseudo-second order rate expression provided the best fitting kinetic model. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:143 / 153
页数:11
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