Micro solid phase extraction of cadmium and lead on a new ion-imprinted hierarchical mesoporous polymer via dual-template method in lake water and fish muscles

A new type of hierarchical silica based dual-template imprinted mesoporous polymers has been employed for micro solid phase extraction of cadmium and lead at ultra trace levels. The biological nanocrystalline cellulose (BNCC) was synthesized via acid catalyzed hydrolysis of cotton wool and for the first time, a hierarchical silica based cadmium/lead imprinted mesoporous polymers (HS-Cd/Pb-IMPs) has been fabricated by dual-template procedure. BNCC and cetyltrimethylammonium bromide (CTAB) were applied as hard and soft templates, respectively. Fourier infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), X-ray diffraction (XRD), and nitrogen adsorption-desorption were used to characterize the structure and functional groups of as-prepared HS-Cd/Pb-IMPs. The analytical parameters such as pH, amount of polymer and contact time were selected and optimized by experimental design. The proposed procedure was successfully applied to determine Cd(II) and Pb(II) ions in the river water and fish samples.