Abstract
This study focused on synthesis of anionic magnetite nanoparticles (MNPs) immobilized with a bisphenol A (BPA)-specific peptide aptamer for selective BPA adsorption. The MNP surface was coated with anionic poly(2-acrylamido-2-methylpropane sulfonic acid) (PAMPS) to provide water dispersibility and stability. These nanosorbents, with a saturation magnetization value of 47 emu/g, responded well to the change in zeta potential and hydrodynamic size with varying dispersion pH. The aptamer loading capacity of particles was 0.12 mg/mg MNPs, and the nanosorbents exhibited a 47% BPA adsorption capacity. Importantly, they shown high selectivity in capturing BPA over structurally similar molecules.
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