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Ion Imprinted Polymer Monoliths as Adsorbent Materials for the Removal of Hg(II) from Real-Time Aqueous Samples


Affiliations
1 Chemistry Department, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia
2 Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
3 Chemical Engineering and Environmental Department, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia
 

Ion imprinted polymer monoliths (IIMs) for the adsorption of Hg(II) ions in tablet form were prepared by forming a mercury ion (template ion) complex with 2-(methacryloyloxy)ethyl trimethylammonium cysteine (ligand) and thermally copolymerized with a monomer (methacrylic acid), cross-linker (ethylene glycol dimethacrylate), initiator (benzoyl peroxide) and porogen (acetonitrile) in the polyethylene tube (drinking straw) as a mould. The formed composite was thoroughly characterized by means of FTIR, TGA, FESEM and BET, and further tested by applying the changes in solution pH, concentration, contact time, recycle test and selectivity. The analysis revealed that the activity of the materials was maximum at pH 4.7 and adsorption capacity of Hg(II) by IIMs followed the Langmuir isotherm model. The adsorption equilibrium was achieved after 120 min and followed the second-order reversible kinetics. In addition, we found that the IIMs were reusable up to 15 cycles and exhibited good selectivity towards the Hg(II) ions even in the presence of other interference ions such as Pb(II), Cd(II), As(II) and Cr(III). On further testing for the recovery of Hg(II) ions in real-time aqueous samples (contaminated petrochemical and mining industries), the IIM tablets showed higher selectivity and excellent reusability. In summary, we indicate that the IIMs are easy to prepare, possess high levels of permeability, porosity and selectivity, and offer excellent reusability, thereby making them one of the promising candidates for the successful removal of mercury ions from industrial samples.

Keywords

Adsorbent Material, Ion Imprinted Polymer Monoliths, Mercury Ions Selectivity, Waste-Water Treatment.
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  • Miretzky, P. and Cirelli, A. F., Hg(II) removal from water by chitosan and chitosan derivatives: a review. J. Hazard. Mater., 2009, 167, 10–23.

  • Gaulier, F. et al., Mercury speciation in liquid petroleum products: comparison between on-site approach and lab measurement using size exclusion chromatography with high resolution inductively coupled plasma mass spectrometric detection (SEC-ICP-HR MS).Fuel Process. Technol., 2015, 131, 254–261.

  • Rodriguez, O., Padilla, I., Tayibi, H. and López-Delga, A., Concerns on liquid mercury and mercury-containing wastes: a review of the treatment technologies for the safe storage. J. Environ. Manage., 2012, 101, 197–205.

  • Wang, J., Feng, X., Anderson, C. W., Xing, Y. and Shang, L., Remediation of mercury contaminated sites – a review. J. Hazard. Mater., 2012, 221–222, 1–18.

  • Wilhelm, S. M. and Bloom, N., Mercury in petroleum. Fuel Process. Technol., 2000, 63, 1–27.

  • Wilcox, J. et al., Mercury adsorption and oxidation in coal combustion and gasification processes. Int. J. Coal Geol., 2012, 90–91, 4–20.

  • Ganjali, M. R., Alizadeh, T., Azimi, F., Larjani, B., Faridbod, F. and Norouzi, P., Bio-mimetic ion imprinted polymer based potentiometric mercury sensor composed of nano-materials. Int. J. Electrochem. Sci., 2011, 6, 5200–5208.

  • Liu, Y., Chang, X., Yang, D., Guo, Y. and Meng, S., Highly selective determination of inorganic mercury(II) after preconcentration with Hg(II)-imprinted diazoaminobenzene–vinylpyridine copolymers. Anal. Chim. Acta, 2005, 538, 85–91.

  • Singh, D. K. and Mishra, S., Synthesis and characterization of Hg(II)-ion-imprinted polymer: kinetic and isotherm studies. Desalination, 2010, 257, 177–183.

  • Xingliang, S., Jinhua, L., Jiangtao, W. and Lingxin, C., Quercetin molecularly imprinted polymers: preparation, recognition characteristics and properties as sorbent for solid-phase extraction. Talanta, 2009, 80, 694–702.

  • Haginaka, J. and Sanbe, H. J., Uniformly sized molecularly imprinted polymer for (S)-naproxen: retention and molecular recognition properties in aqueous mobile phase. J. Chromatogr. A, 2001, 913, 141–146.

  • Chen, Z. Y., Zhao, R., Shangguan, D. H. and Liu, G. Q., Preparation and evaluation of uniform-sized molecularly imprinted polymer beads used for the separation of sulfamethazine. Biomed. Chromatogr., 2005, 19, 533–538.

  • Ye, L., Weiss, R. and Mosbach, K., Synthesis and characterization of molecularly imprinted microspheres. Macromolecules, 2000, 33, 8239–8245.

  • Glad, M., Reinholdsson, P. and Mosbach, K., Molecularly imprinted composite polymers based on trimethylolpropanetrimethacrylate (TRIM) particles for efficient enantiomeric separations. React. Polym., 1995, 25, 47–54.

  • Liu, X., Ouyang, C., Zhao, R., Shangguan, D., Chen, Y. and Liu, G., Monolithic molecularly imprinted polymer for sulfamethoxazole and molecular recognition properties in aqueous mobile phase. Anal. Chim. Acta, 2006, 571, 235–241

  • Tumin, N. D., Chuah, A. L., Zawani, Z. and Rashid, S. A., Adsorption of copper from aqueous solution by ElaisGuineensis kernel activated carbon. J. Eng. Sci. Technol., 2008, 3(2), 180–189.

  • dos Santos, V. C. G., Grassi, M. T. and Abate, G., Sorption of Hg (II) by modified K10 montmorillonite: influence of pH, ionic strength and the treatment with different cations. Geoderma, 2015, 237, 129–136.

  • Thakur, S., Kumari, S., Dogra, P. and Chauhan, G. S., A new guar gum-based adsorbent for the removal of Hg(II) from its aqueous solutions. Carbohydr. Polym., 2014, 106, 276–282.

  • Rahchamani, J., Mousavi, H. Z. and Behzad, M., Adsorption of methyl violet from aqueous solution by polyacrylamide as an adsorbent: isotherm and kinetic studies. Desalination, 2011, 267(2), 256–260.

  • Kavitha, D. and Namasivayam, C., Experimental and kinetic studies on methylene blue adsorption by coir pith carbon. Bioresour. Technol., 2007, 98, 14–21.

  • Ong, S. T., Lee, C. K. and Zainal, Z., Removal of basic and reactive dyes using ethylenediamine modified rice hull. Bioresour. Technol., 2007, 98, 2792–2794.

  • Komiyama, M., Takeuchi, T., Mukawa, T. and Asanuma, H., Molecular Imprinting from Fundamentals to Applications, WileyVCH Verlag GmbH & Co. KGaA, Weinheim, Germany, 2003.

  • Svenson, J. and Nicholls, I. A., On the thermal and chemical stability of molecularly imprinted polymers. Anal. Chim. Acta, 2001, 435, 19–24.

  • UK Essays. November 2013; https://www.ukessays.com/essays/environmental-sciences/mercury-problems-inoil-and-gas-industries-environmental-sciences-essay.php?cref=1 (accessed on 30 April 2017).


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  • Ion Imprinted Polymer Monoliths as Adsorbent Materials for the Removal of Hg(II) from Real-Time Aqueous Samples

Abstract Views: 374  |  PDF Views: 99

Authors

Siti Khadijah Ab. Rahman
Chemistry Department, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia
Nor Azah Yusof
Chemistry Department, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia
Faruq Mohammad
Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
Abdul Halim Abdullah
Chemistry Department, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia
Azni Idris
Chemical Engineering and Environmental Department, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia

Abstract


Ion imprinted polymer monoliths (IIMs) for the adsorption of Hg(II) ions in tablet form were prepared by forming a mercury ion (template ion) complex with 2-(methacryloyloxy)ethyl trimethylammonium cysteine (ligand) and thermally copolymerized with a monomer (methacrylic acid), cross-linker (ethylene glycol dimethacrylate), initiator (benzoyl peroxide) and porogen (acetonitrile) in the polyethylene tube (drinking straw) as a mould. The formed composite was thoroughly characterized by means of FTIR, TGA, FESEM and BET, and further tested by applying the changes in solution pH, concentration, contact time, recycle test and selectivity. The analysis revealed that the activity of the materials was maximum at pH 4.7 and adsorption capacity of Hg(II) by IIMs followed the Langmuir isotherm model. The adsorption equilibrium was achieved after 120 min and followed the second-order reversible kinetics. In addition, we found that the IIMs were reusable up to 15 cycles and exhibited good selectivity towards the Hg(II) ions even in the presence of other interference ions such as Pb(II), Cd(II), As(II) and Cr(III). On further testing for the recovery of Hg(II) ions in real-time aqueous samples (contaminated petrochemical and mining industries), the IIM tablets showed higher selectivity and excellent reusability. In summary, we indicate that the IIMs are easy to prepare, possess high levels of permeability, porosity and selectivity, and offer excellent reusability, thereby making them one of the promising candidates for the successful removal of mercury ions from industrial samples.

Keywords


Adsorbent Material, Ion Imprinted Polymer Monoliths, Mercury Ions Selectivity, Waste-Water Treatment.

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DOI: https://doi.org/10.18520/cs%2Fv113%2Fi12%2F2282-2291