Vipul Vilas Kusumkar

Bio: Vipul Vilas Kusumkar is an academic researcher from Comenius University in Bratislava. The author has contributed to research in topics: Ion exchange & Adsorption. The author has an hindex of 1, co-authored 1 publications receiving 2 citations.

Ion-Imprinted Polymers: Synthesis, Characterization, and Adsorption of Radionuclides.

Abstract: Growing concern over the hazardous effect of radionuclides on the environment is driving research on mitigation and deposition strategies for radioactive waste management. Currently, there are many techniques used for radionuclides separation from the environment such as ion exchange, solvent extraction, chemical precipitation and adsorption. Adsorbents are the leading area of research and many useful materials are being discovered in this category of radionuclide ion separation. The adsorption technologies lack the ability of selective removal of metal ions from solution. This drawback is eliminated by the use of ion-imprinted polymers, these materials having targeted binding sites for specific ions in the media. In this review article, we present recently published literature about the use of ion-imprinted polymers for the adsorption of 10 important hazardous radionuclides—U, Th, Cs, Sr, Ce, Tc, La, Cr, Ni, Co—found in the nuclear fuel cycle.

Isotherm, Kinetic, and Selectivity Studies for the Removal of 133Ba and 137Cs from Aqueous Solution Using Turkish Perlite

Abstract: The efficiency of 133Ba and 137Cs removal from aqueous solution is vital to mitigate ecological concerns over spreading these radionuclides in the environment. The present work focused on the use of Turkish perlite for the sorptive removal of 133Ba and 137Cs from aqueous solution by the radioindicator method. Perlite was characterized by XRF, XRD, FTIR, SEM–EDX, and BET analyses. The maximum percentage removals of 88.2% and 78.7% were obtained for 133Ba and 137Cs at pH 6 and pH 9, respectively. For both ions, the sorption equilibrium was attained relatively rapidly. Experimental kinetic data were well described with pseudo-second-order and intraparticle diffusion models. The uptake of both ions increased with the increase in metal concentration (1 × 10−5 to 5 × 10−2 mol/L) in solution. The maximum uptake capacities of 133Ba and 137Cs were found to be 1.96 and 2.11 mmol/g, respectively. The effect of competing ions decreased in the order of Ca2+>K+>Ni2+>Na+ for 133Ba sorption, whereas for 137Cs sorption, the order was determined as Ca2+>Ni2+>K+>Na+. Selectivity studies pointed out that sorption of 133Ba onto perlite is preferable to 137Cs. Therefore, Turkish perlite is a promising, cost-effective, and efficient natural material for the removal of 133Ba and 137Cs from relatively diluted aqueous solution.

Benefit of ion imprinting technique in solid-phase extraction of heavy metals, special focus on the last decade

Abstract: Because of its many advantages, solid phase extraction (SPE) is considered to be the best process for removing heavy metals from water. Ion-imprinted polymers (IIPs) have been broadly used in the last decade as SPE adsorbents for the retention of metals ions from aqueous solutions. This itemized review list thorough literature over the last decade from 2010 until present and highlights the main results related to adsorption studies where IIPs are used as SPE adsorbents for the selective separation of heavy metals. In the first part of this review elaboration methods, components, and major polymerization techniques to produce IIPs have been described. In the second part, synthesis parameters, adsorption performance and a descriptive analysis of SPE of heavy metals by IIPs have been provided. In this review it is underlined that there are many parameters to optimize in order to obtain the required performance of the IIPs. These parameters are mainly linked to synthesis process and one of the most important is the synthesis of new ligands to improve the selectivity with respect to the target ion.

Electrochemical sensors modified with ion-imprinted polymers for metal ion detection

Abstract: Quantification of trace levels of metal ions is an important issue in terms of health and environment safety. Ion-imprinted polymers (IIPs) are synthetic materials that present excellent selectivity properties. Therefore, when combined with electrochemical sensors, proven to be low-cost and time-efficient, they can act as remarkably selective receptors. The development of these type of electrochemical sensors has seen an increase in attention in the past decade. The aim of this review is to give the current state of the art in the conception and performances of IIP-based electrochemical sensors (IIPECS). It is illustrated by many examples of applications that prove the high potential of IIPECS to quantify metal ions in a wide range of real samples with high sensitivity and selectivity.

A Core-Shell Amino-Functionalized Magnetic Molecularly Imprinted Polymer Based on Glycidyl Methacrylate for Dispersive Solid-Phase Microextraction of Aniline

Abstract: A core-shell amino-functionalized glycidyl methacrylate magnetic molecularly imprinted polymer (MIP) was synthesized by the suspension polymerization/surface imprinting method and characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), mercury porosimetry, nitrogen gas adsorption–desorption, and elemental analysis. This MIP was used as the sorbent in dispersive solid-phase microextraction (DSPME) of aniline from textile wastewater prior to high-performance liquid chromatography-mass spectrometry (HPLC-MS) measurements. Since aniline is toxic and a probable human carcinogen, its determination in water is of great significance. This is a challenging task because aniline is usually present at trace levels. The effects of different DSPME variables on the preconcentration efficiency have been studied by using the Plackett–Burman screening design of experiments (DoE) followed by response surface methodology optimization using the Box-Behnken design. Thus, DoE enabled the investigation of several variables simultaneously. Under optimized conditions, aniline was effectively and selectively separated by a small amount of the DSPME sorbent and detected in real textile wastewater samples. The method detection limit of 1 ng mL−1 was attained, with good method linearity and acceptable recovery and precision. The results showed that the studied MIP could be a reliable DSPME sorbent for efficiently analyzing trace aniline in real wastewater samples.

Recent advances and application of carbon nitride framework materials in sample preparation

Abstract: Sample preparation is an indispensable process in sample analysis. Solid-phase extraction technology can isolate and enrich target analytes from complex matrices, eliminating potential interferences and improving method parameters such as sensitivity, accuracy and precision. Carbon nitride framework materials (CNFs) consisted with tri- s -triazine units have attracted increasing attention as solid-phase extractants in analytical fields. The affluent in-built N-rich functional groups and large delocalized large π bonds structure endow CNFs excellent extraction capacity and selectivity based on chemical complexation, ions exchange, strong π-π conjugation, hydrogen bond interaction and electrostatic interaction. In this review, we focus on the advancements of CNFs materials in sample preparation. The preparation methods of CNFs with different chemical structures are introduced. Besides, modification strategies for improving adsorption efficiency and selectivity of CNFs are summarized. Finally, the applications of CNFs in inorganic and organic extraction and analysis (pesticide residues, foods and environment pollution analysis) are reviewed. In this review, the preparation methods, extraction mechanism with different modes, modified strategies and the applications of carbon nitride framework materials in different analysis fields has been comprehensively summarized, which is necessary and significative for development and exploration the carbon nitride materials in sample preparation. • The sample preparation based on carbon nitride framework materials are summarized. • The synthesis, extraction mechanism and relevant influence factors of carbon nitride framework materials are discussed. • Various functionalized strategies of carbon nitride framework materials for sample preparation are explored and developed. • The extraction and analysis application of carbon nitride framework materials are summarized. • The forecasts and challenges of carbon nitride framework materials in sample preparation are illustrated.