Adsorption of metallic ions from aqueous solution on surfactant aggregates: a molecular dynamics study
Por:
Chavez-Martinez, E. H., Cedillo-Cruz, E., Dominguez, H.
Publicada:
1 ene 2021
Resumen:
Metallic ion adsorption on surfactant aggregates were studied with
Molecular dynamics simulations. Using ionic salts, such as lead sulfate
(PbSO4) and aluminum sulfate [Al-2(SO4)(3)], adsorption of lead and
aluminum were investigated at different salt concentrations and
different surfactant aggregates (micelles) sizes. The micelles were
constructed with spherical shapes composed of sodium dodecyl sulfate
(SDS) anionic surfactants. The electrostatic interactions between the
positive ions and the negative SDS headgroups promote capture of the
metal particles on the aggregate surface. Metal adsorption was analyzed
in terms of radial density profiles, partial pair distribution functions
and adsorption isotherms. It is showed that SDS micelles adsorb better
lead than aluminum ions regardless of the size of the aggregates and
salt concentrations.
Filiaciones:
Chavez-Martinez, E. H.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Unam Cd Mx 04510, Mexico
Cedillo-Cruz, E.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Unam Cd Mx 04510, Mexico
Dominguez, H.:
(Corresponding Author), Univ Nacl Autonoma Mexico, Inst Invest Mat, Unam Cd Mx 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Invest Mat, Unam Cd Mx 04510, Mexico
Gold
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