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Quinoline‐Based Polymers for Selective and Efficient Adsorption/Solid‐Phase Extraction of Pb(II) and Zn(II) from Water
Author(s) -
Younes Eyad A.,
ElSheikh Amjad H.,
Ghadieh Rahaf K.
Publication year - 2025
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202406187
Abstract In this study, two quinolone‐based polymers were used for the adsorption and solid‐phase extraction (SPE) of Pb(II) and Zn(II) from water. The polymers were synthesized via a Suzuki coupling reaction, and their structures were confirmed by IR and NMR analyses. Batch adsorption experiments at varying pH showed that both polymers removed approximately 50% of Pb(II) and 40% of Zn(II), with negligible uptake of Cd(II), Co(II), and Mn(II) (<10%), indicating good selectivity. Poly─Q─OBz exhibited superior adsorption capacity based on isotherm analysis. SPE conditions were optimized at pH 8, with a flow rate of 1.7 mL min⁻¹ and elution using 0.5 M HNO₃, achieving recoveries of Pb(II) and Zn(II) greater than 90%, even in the presence of competing ions. Spiked concentrations (0.2–10 mg L⁻¹) yielded the following performance metrics: LODs of 0.0064 and 0.0011 mg L⁻¹, dynamic ranges of 0.0213–10.0 and 0.0036–10.0 mg L⁻¹, sensitivities of 0.258 and 1.546 L mg⁻¹, and enrichment factors of 9.0 and 9.2. This method was successfully applied to real water samples, demonstrating that the polymers are efficient, selective, reusable, and cost‐effective.