Incorporation of Ni(II)-dimethylglyoxime ion-imprinted polymer into electrospun polysulphone nanofibre for the determination of Ni(II) ions from aqueous samples

Abstract

Ni(II)-dimethylglyoxime ion-imprinted polymer (Ni(II)-DMG IIP) was encapsulated in polysulphone and electrospun into nanofibres with diameters ranging from 406 to 854 nm. The structures of the Ni(II)-DMG encapsulated-IIP nanofibre, non-imprinted encapsulated-polymer nanofibre and polysulphone nanofibre mats were observed by scanning electron microscopy and evaluated by infrared spectroscopy. Electrospinning increased the specific surface area of the Ni(II)-DMG encapsulated-IIP nanofibre mats, as was evidenced by the low masses of the Ni(II)-DMG encapsulated-IIP nanofibre mats used. The accuracy of the method was validated by analysing a custom solution of certified reference material (SEP-3); the concentration of Ni(II) obtained was close to the certified one. The limit of detection was found to be 4.0x10 -4 µg•mℓwhile the limit of quantification was found to be 1.2x10. The recovery of Ni(II) achieved using the Ni(II)-DMG imprinted nanofibre mats in water samples was found to range from 83 to 89%, while that of non-imprinted nanofibre mats was found to range from 59 to 65%, and that of polysulphone from 55 to 62%.

Review of ion imprinted polymers nanofiber with technology electrospinning: An advanced materials for removal of heavy metal ions

“…The absorption band at 1728 cm -1 was assigned to the carbonyl group of TMSPMA. A comparison of the K 2 Cr 2 O 7 and IIPs spectra showed no K 2 Cr 2 O 7 index peak, confirming the complete extraction of the Cr (VI) anion from the IIPs structure [63].…”

“…An example of the use of this method is cited in the research carried out by Rammika et al (2011), where IIPs particles obtained through precipitation and mini-emulsion polymerization approaches were suspended with 10 m dimethyl formamide (DMF) and 200 mg polysulphone (PSU), and the solution was stirred for three hours. The resulting solution is further electrospinning at a high voltage of 15 kV.…”

“…The fibre obtained is stored in a desiccator to evaporate the remaining solvent. The adsorption process is carried out at the end using an HCl solution to eliminate Ni (II) metal ions [63]. Hassanzadeh et al successfully developed the most recent method of producing NF IIPs for the adsorption of Cr (VI) metal ions by preparing IIPs particles and fibres separately.…”

Review—Towards Mercury Free: Ion Imprinted Polymer-Based Electrochemical Sensors for Monitoring of Mercury(II)

“…Because of the highly crosslinked polymers, IIPs are durable and can be reused without loss of activity and as classical chelating resins, they can be stored and used in solvent, pH, temperature and pressure conditions that natural systems would not tolerate. 47,55 Hg-IIP Preparation Approaches Rao et al classified the synthesis of metal ion-imprinted polymers into the four approaches based on the inclusion of ligands in the polymer matrix: (i) chemical immobilization by preparation of binary complexes of metal ions with ligands having vinyl groups, isolation and then polymerization with matrix-forming monomers; (ii) trapping of non-vinylated chelating ligand via imprinting of binary/ternary mixed ligand complexes of metal ions with a nonvinylated chelating agent and vinyl ligand; (iii) surface imprinting on the aqueous-organic interface; (iv) linear chain polymers carrying metal-binding groups cross-linked with a bifunctional reagent. 48 Branger et al 50 provided an elegant schematic of Hg-IIP preparation (Fig.…”

Multi-templated Pb-Zn-Hg Ion Imprinted Polymer for the Selective and Simultaneous Removal of Toxic Metallic Ions from Wastewater

“…They are not easily degradable (Chopra, Pathak, & Prasad, 2009), thus, their tendency to accumulate in the environment, and eventually end up in the human food chain. Although the human body needs some of these metal ions in trace quantities, their existence in high concentrations can result in serious human ailments (Rammika, Darko, & Torto, 2011). Henceforth, it is essential that the concentration of heavy metal ions in recycled wastewater be considerably reduced to acceptable levels as set out by international monitoring agencies such as the World Health Organization (WHO) (Javed & Usmani, 2013), Food and Agriculture Organization (FAO) (Elnabris, Muzyed, & El-Ashgar, 2013) and Environment Protection Agency standard (EPA) (Barakat, 2011).…”