Involvement of aminoalkylated merrifield resins retracted by bis(chlorodiethyl) ether in metal extraction
Original scientific paper
DOI:
https://doi.org/10.2298/CICEQ240814011MKeywords:
Merrifield resin, ethylenediamine, chlorodiethyl, metal extractionAbstract
Merrifield resin, a cross-linked polystyrene resin with chloromethyl functional groups, is an extremely resilient material resistant to water and environmental degradation. Our objective is to develop novel substituted polymers with functional groups capable of chelating heavy metals for depollution applications. Cross-linked polymer networks, which are predominantly insoluble and adaptable to diverse chemical environments, are invaluable for pollution management. A key area of environmental significance is the selective retention of organic contaminants for purifying polluted water sources. This work focuses on creating new chelating polymeric sorbents for metal extraction by grafting ethylenediamine (EDA) and triethylenetetramine (TETA) onto Merrifield resin, resulting in two polymers: MR-EDA and MR-TETA. These modified polymers are further reticulated with bis(chlorodiethyl) ether to produce two novel reticulated polymers, MR-TETA-BCEE and MR-EDA-BCEE.To characterize the polymers, differential thermal analysis (DTA) and infrared (IR) spectroscopy are employed. The resins are subsequently tested for their ability to extract lead (Pb²⁺) and lithium (Li⁺) ions from aqueous solutions using the solid-phase extraction (SPE) method. Conductivity and atomic absorption spectrometry (AAS) analyses demonstrate high extraction efficiencies, ranging from 50% to 85% for both Pb²⁺ and Li⁺ ions. These results demonstrate the potential of MR-EDA-BCEE and MR-TETA-BCEE as effective polymeric sorbents for environmental remediation and heavy metal removal from water.
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