Adsorption of Pb(II) on activated carbon prepared from Polygonum orientale Linn.: Kinetics, isotherms, pH, and ionic strength studies

被引：323

作者：

Wang, Li ^{[1
]}

Zhang, Jian ^{[1
]}

Zhao, Ran ^{[1
]}

Li, Ye ^{[1
]}

Li, Cong ^{[1
]}

Zhang, Chenglu ^{[1
]}

机构：

[1] Shandong Univ, Sch Environm Sci & Engn, Jinan 250100, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2010年 / 101卷 / 15期

关键词：

Polygonum-orientale-Linn.-activated carbon (PLAC); Lead; Adsorption kinetics and isotherms; pH; Ionic strength; AQUEOUS-SOLUTIONS; SARGASSUM SP; REMOVAL; SORPTION; ACID; LEAD; BIOSORPTION; DESORPTION; AMMONIA; METALS;

D O I：

10.1016/j.biortech.2010.02.099

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Low-cost activated carbon was prepared from Polygonum orientate Linn. (PL) by phosphoric acid activation. Its ability to adsorb Pb(II) ions from aqueous solutions was examined. Through SEM, XRD, BET, and FTIR analyses, the PL-activated carbon (PLAC) was found to have a porous structure with a surface area of about 1400 m(2)/g. Carboxyl groups played an important role in the adsorption of Pb(II) through blocking studies. The sorption system followed a pseudo second-order kinetic model, and the equilibrium time was obtained after 30 min. The adsorption isotherms were simulated well by the Langmuir model. The adsorption of Pb(II) on PLAC was strongly dependent on pH and ionic strength, indicating an ion-exchange mechanism. Regeneration studies showed that PLAC could be used several times by desorption with an HCl reagent. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：5808 / 5814

页数：7

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