Novel magnetic beads based on sodium alginate gel crosslinked by zirconium(IV) and their effective removal for Pb2+ in aqueous solutions by using a batch and continuous systems

被引：145

作者：

Li, Xiaoli ^{[1
]}

Qi, Yongxin ^{[1
]}

Li, Yanfeng ^{[1
]}

Zhang, Yun ^{[1
]}

He, Xinghua ^{[1
]}

Wang, Yonghuan ^{[1
]}

机构：

[1] Lanzhou Univ, State Key Lab Appl Organ Chem, Coll Resources & Environm, Coll Chem & Chem Engn,Inst Biochem Engn & Environ, Lanzhou 730000, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 142卷

关键词：

Pb2+; Fe3O4@SA-Zr; Adsorption; Heavy metal; Wastewater treatment; HEAVY-METALS; CALCIUM ALGINATE; CHELATING RESIN; PB(II) IONS; ADSORPTION; WASTE; SORPTION; BIOSORPTION; ADSORBENTS; WATER;

D O I：

10.1016/j.biortech.2013.05.081

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Novel magnetic sodium alginate gel beads (Fe3O4@SA-Zr) were successfully prepared by using zirconium(IV) as crosslinking ions, and used as adsorbent for removal of Pb2+ ions from aqueous solutions in batch and fixed-bed column systems. Fe3O4@SA-Zr was characterized by SEM, FT-IR, XRD and VSM. Fe3O4@SA-Zr had the macroporous structure, exhibited greater stability and possessed a sensitive magnetic response. More importantly, Fe3O4@SA-Zr exhibited high adsorption capacity, fast kinetics and high selectivity towards Pb2+ ions. Experimental data was well described by Langmuir isotherm with a maximum adsorption capacity of 333.33 mg/g. FTIR and XPS indicated that the carboxyl and hydroxyl groups of SA and hydroxyl groups binding to Fe and Zr species were involved in Pb2+ adsorption. Fixed-bed column packed with Fe3O4@SA-Zr exhibited higher removal efficiency for Pb(2+)ions. Consequently, Fe3O4@SA-Zr with excellent absorbability, stability and reusability could be used as a promising adsorbent for Pb2+ removal in wastewaters. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：611 / 619

页数：9

共 35 条

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