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

Abstract：

:Low-cost activated carbon was prepared from Polygonum orientale 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.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Wang L,Zhang J,Zhao R,Li Y,Li C,Zhang C

doi

10.1016/j.biortech.2010.02.099

subject

Has Abstract

pub_date

2010-08-01 00:00:00

pages

5808-14

issue

15

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(10)00410-4

journal_volume

101

pub_type

杂志文章

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