Removal and separation of heavy metal ions from multi-component simulated waters using silica/polyethyleneimine composite microparticles

ACS Applied Materials & Interfaces
Florin BucatariuMarcela Mihai

Abstract

The composite solid surfaces with high content of functional groups (FG) are useful materials in different types of applications requiring stimuli responsive "hard/soft" architectures, their improved properties rising from the combination of organic/inorganic parts. Among different types of weak polyelectrolytes, poly(ethyleneimine) (PEI) is of great interest in construction of composite systems with thin layer-by-layer (LbL) organic films due to the large number of amino groups per unit mass of polymer. Herein, the spherical silica microparticles were modified with linear (L) or branched (B) PEI chains using LbL deposition of a copper complex (PEIL-Cu2+ or PEIB-Cu2+) and poly(acrylic acid) (PAA), glutaraldehyde selective cross-linking and followed by copper and PAA extraction from multilayer. The newly formed silica/(PEIL)10 and silica/(PEIB)10 composites were used in batch and column sorption/desorption experiments of four heavy metal ions (Cu2+, Ni2+, Co2+ and Cd2+). In noncompetitive conditions ([FG]:Σ[M2+] > 9) all heavy metal ions were retained on composites, demonstrating the potential application of the prepared functional microparticles in surface water treatment. Instead, in competitive conditions ([FG]:Σ[M2+] < 9), o...Continue Reading

References

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Sep 25, 2019·Materials Science & Engineering. C, Materials for Biological Applications·Claudiu-Augustin GhiorghitaEcaterina Stela Dragan

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Citations

Jan 4, 2021·Chemosphere·Claudiu-Augustin Ghiorghita, Marcela Mihai

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