Sorption and desorption of Pb2+ ions by dead Sargassum sp biomass

被引：147

作者：

Martins, BL ^{[1
]}

Cruz, CCV ^{[1
]}

Luna, AS ^{[1
]}

Henriques, CA ^{[1
]}

机构：

[1] Univ Estado Rio De Janeiro, Dept Analyt Chem, Inst Chem, BR-20559900 Rio De Janeiro, Brazil

来源：

BIOCHEMICAL ENGINEERING JOURNAL | 2006年 / 27卷 / 03期

关键词：

biosorption; equilibrium; kinetic; lead; Sargassum sp;

D O I：

10.1016/j.bej.2005.08.007

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：

Dead Sargassum sp. as a biosorbent for Pb2+ ions from aqueous solutions was studied. Kinetics and equilibrium of Pb2+ biosorption were evaluated. The biosorption process used in this work followed a second-order kinetics and was not influenced by temperature, at least within 298-328 K. The equilibrium of biosorption was well described by Langmuir isotherm and the maximum Pb2+ uptake capacity (1.26 mmol g(-1)) is higher than those reported in the literature, for different sorbents. More than 95% of sorbed Pb2+ cations could be removed by desorption with a 0.10 mol l(-1) Na(2)EDTA solution at 298 K. (c) 2005 Published by Elsevier B.V.

引用

页码：310 / 314

页数：5

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