Preparation and Heavy Metal Ions Chelating Properties of Multifunctional Polymer-Grafted Silica Hybrid Materials

In this research work, novel hybrid materials based on multifunctional polymers and silica were developed and investigated in view of possible employment as sorbents for removal of heavy metal ions from water in presence of various ions. Organic-inorganic hybrid materials were prepared by covalent b...

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Bibliographic Details
Published in:Advances in materials science and engineering 2019-01, Vol.2019 (2019), p.1-11
Main Authors: Sartore, Luciana, Dey, Kamol
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Aqueous solutions
Binding sites
Chelation
Chemical synthesis
Columns (structural)
Copper
Distilled water
Fourier transforms
Heavy metals
Hydrochloric acid
Investigations
Ions
Metal ions
Nickel
Organic chemistry
Pollutants
Polymers
Porous materials
Properties (attributes)
Selectivity
Sensors
Silicon dioxide
Solid phases
Sorbents
Water treatment
Zinc
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Summary:In this research work, novel hybrid materials based on multifunctional polymers and silica were developed and investigated in view of possible employment as sorbents for removal of heavy metal ions from water in presence of various ions. Organic-inorganic hybrid materials were prepared by covalent bonding of vinyl-terminated polyamidoamine (PAA) onto aminated silica particles. Two series of polyamidoamine-grafted silica, differing in the PAA chemical structure, were synthesized, and their heavy metal ions chelating properties were investigated. Column adsorption procedure for Cu, Zn, and Ni in aqueous solution was successfully established. Moreover, the adsorption behaviour of the materials was evaluated in different ionic strength solutions as well as in distilled and natural water. Organic-inorganic hybrid materials exhibited excellent chelating properties and selectivity for different metal ions. The hybrid columns showed exceptional eluting and regenerating property using diluted hydrochloric acid solution as eluent. In particular, the hybrid materials containing more carboxy groups possessed superior adsorption ability, reusability, and stability. The consecutive adsorption-desorption experiments exhibited that this material could be reused more than 20 cycles without almost any loss of adsorption capability. These new organic-inorganic sorbents appear very promising as an effective solid-phase extraction material for the selective preconcentration or removing of heavy metal ions from the environment.
ISSN:1687-8434
1687-8442
DOI:10.1155/2019/7260851