Modeling competitive sorption of lead and copper ions onto alginate and greenly prepared algal-based beads.

Abstract:

:The binary sorption of Pb(II) and Cu(II) onto calcium alginate, algal biomass and algal/glutaraldehyde-crosslinked polyethyleneimine (PEI) composite beads was studied in the absence and presence of Ca(II). Different competitive models were compared for predicting the equilibrium data. Results show that all the sorbents have a significant preference for Pb(II) over Cu(II) in Pb-Cu system: the separation factors reach 14.1, 9.1 and 3.6 for alginate, algal biomass and algal/PEI beads, respectively. Kinetic studies confirm the occurrence of an ion-exchange mechanism between Pb(II) and Cu(II) as the sorption sites are progressively saturated. Competitive Sips model predicts well the sorption data for all the sorbents. In Pb-Cu-Ca system, the Cu(II) sorption by algal beads was negligible, while algal/PEI still maintained a significant sorption of Cu(II) sorption under these conditions.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Wang S,Vincent T,Faur C,Guibal E

doi

10.1016/j.biortech.2017.01.066

subject

Has Abstract

pub_date

2017-05-01 00:00:00

pages

26-35

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(17)30103-7

journal_volume

231

pub_type

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