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Removal of copper ions from aqueous solution by adlai shell (Coix lacryma-jobi L.) adsorbents.

Abstract：

:Adlai shell (Coix lacryma-jobi L.) adsorbents (ASA) were used to remove copper ions from aqueous solutions under batch conditions. The effect of physical and chemical modification of ASA on Cu(II) removal was evaluated. Results showed that the high coefficients of determination for the pseudo-second order (R(2) > 0.9999) and for the intraparticle diffusion (R(2) > 0.9843) equations indicate that the rate-determining step is a combination of pore diffusion and chemisorption at low Cu(II) concentration and boundary layer, pore diffusion and chemisorption at high Cu(II) concentration. At 298K and 100 mg L(-1) Cu(II), the computed qe and k2 values were 17.2 mg g(-1) and 0.012 g mg(-1) min(-1), respectively. The Freundlich model (R(2) > 0.9636) adequately describes the experimental data indicating heterogeneous adsorption. Overall, the results of the study demonstrate the potential of adlai shell adsorbents for the removal of heavy metals from aqueous solutions.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

de Luna MD,Flores ED,Cenia MC,Lu MC

doi

10.1016/j.biortech.2015.06.018

subject

Has Abstract

pub_date

2015-09-01 00:00:00

pages

841-4

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(15)00804-4

journal_volume

192

pub_type

杂志文章

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