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Biosorption of Multifold Toxic Heavy Metal Ions from Aqueous Water onto Food Residue Eggshell Membrane Functionalized with Ammonium Thioglycolate
journal contribution
posted on 2013-05-29, 00:00 authored by Sha Wang, Minghong Wei, Yuming HuangA new
biosorbent material from eggshell membrane was synthesized
through thiol functionalization, which is based on the reduction of
disulfide bonds in eggshell membrane by ammonium thioglycolate. The
thiol-functionalized eggshell membrane was characterized, and its
application as an adsorbent for removal of Cr(VI), Hg(II), Cu(II),
Pb(II), Cd(II), and Ag(I) from aqueous water has been investigated.
The experimental results revealed that the adsorption abilities of
the thiol-functionalized eggshell membrane toward Cr(VI), Hg(II),
Cu(II), Pb(II), Cd(II), and Ag(I) improved 1.6-, 5.5-, 7.7-, 12.4-,
12.7-, and 21.1-fold, respectively, compared with that of the eggshell
membrane control. The adsorption mechanism and adsorption performance,
including the adsorption capacity and the kinetics of the thiol-functionalized
eggshell membrane for the target heavy metals, were investigated.
The effects of solution pH, coexisting substances, and natural water
matrices were studied. The thiol-functionalized eggshell membrane
can be used as column packing to fabricate a column for real wastewater
purification.
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wastewater purificationsolution pHadsorption capacityadsorption performanceadsorption abilitiesFood Residue Eggshell Membrane Functionalizedbiosorbent materialmembrane controladsorption mechanismammonium thioglycolateAqueous Waterdisulfide bondswater matricescoexisting substancesAmmonium ThioglycolateAthiol functionalizationHeavy Metal Ions
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