The Preparation of p acrylonitrile-co- acrylamide hydrogels for uranyl ion recovery from aqueous environments

Yıl 2014, Cilt: 42 Sayı: 1, 88 - 97, 01.03.2014

Duygu Alpaslan Nahit Aktaş Selehattin Yilmaz Nurettin Sahiner Olgun Güven

Öz

The synthesis of poly acrylonitrile-co-acrylamide p AN-co-AAm hydrogels with different amounts of acrylonitrile AN and acrylamide AAm monomers were carried out by concurrent use of redox and microemulsion polymerization techniques. The prepared hydrogels were amidoximated for sorption of uranyl ion from aqueous medium. Batch type UO2 2+ ion sorption by p AN-co-AAm 0.25:1 mole ratio was carried out and an sorption capacity of 220 mg UO2 2+ mg/g dried hydrogel was found. The highest amount of UO22+ ion sorption, 277 mg/g dry gel was accomplished at pH 4.

Anahtar Kelimeler

Hydrogel, amidoximation, uranyl ion sorption, p AN-co-AAm

Sulu ortamlardan uranil iyonu kazanımı için p akrilonitril-ko-akrilamit hidrojellerinin hazırlanması

Öz

D eğişik miktarlarda akrilonitril AN ve akrilamit AAm monomerleri içeren poli akrilonitril-ko-akrilamit p AN-co-AAm hidrojelleri eş zamanlı redoks ve microemülsiyon polymerizasyon teknikleri kullanılarak gerçekleştirilmiştir. Hazırlanan hidrojeller sulu ortamdan uranil iyonları soğurumu için amidoxime reaksiyonuna tabii tutulmuşlardır. P AN-co-AAm 0.25:1 mole oranında tarafından batch tipi UO2+ iyonu çalışmaları yapılmış ve kuru hidrojel başınan 220 mg/g soğurma kapasitesi bulunmuştur. En fazla uranil iyonu soğurma kapasitesi pH 4 de gram kuru jel başına 277 mg/g olarak gerçekleştirilmiştir

Anahtar Kelimeler

Hidrojel, amidoksimasyon, uranil iyonu soğurumu, p AN-ko-AAm

Kaynakça

• D. James, G. Venkateswaran, T. Prasada Rao, Removal of uranium from mining industry feed simulant solutions, Micropor. Mesopor. Mater. 119 (2009) 165.
• U. Ulusoy, R. Akkaya, Adsorptive features of polyacrylamideeapatite composite for Pb2+, UO22+ and Th4+, J. Hazard. Mater., 163 (2009) 98.
• O. Ozay, S. Ekici, N. Aktas, N. Sahiner, P(4-vinyl pyridine) hydrogel use for the removal of UO22+ and Th4+ from aqueous environments, J. Environ. Management, 92 (2011) 3121.
• A. Denizli, R. Say, B. Garipcan, S. Patır, Methacryloylamidoglutamic acid functionalized poly(2-hydroxyethyl methacrylate) beads for UO22+ removal, React. Funct. Polym., 58 (2004) 123.
• R. Han, W. Zou, Y. Wang, L. Zhu, Removal of uranium(VI) from aqueous solutions by manganese oxide coated zeolite: discussion of absorption isotherms and pH effect, J. Environ. Radioact., 93 (2007) 127.
• A.M. Donia, A.A. Atia, E.M.M. Moussa, A.M. El- Sherif, M.O. Abd El-Magied, Removal of uranium (VI) from aqueous solutions using glycidyl methacrylate chelating resins, Hydrometallurgy, 95 (2009) 3.
• S. Kundakcı, O.B. Uzum, E. Karadağ, A New composite sorbent for water and dye uptake: highly swollen acrylamide/2-acrylamido-2-methyl-1- propanesulfonic acid/clay hydrogels crosslinked by 1,4-butanediol dimethacrylate, Polym. Composite., 30 (2009) 29.
• B. Boonchayaanant, D. Nayak, X. Du, C.S. Criddle, Uranium reduction and resistance to reoxidation under iron-reducing and sulfate-reducing conditions, Water Res., 43(2009) 4652.
• G. Atun, S. Ortaboy, Adsorptive removal of uranium from water by sulfonated phenol “formaldehyde resin, J. Appl. Polym. Sci., 114 (2009) 3793.
• E. Karadağ, O.B. Uzum, S. Kundakcı, D. Saraydın, Polyelectrolyte casa hydrogels for uptake of uranyl ions from aqueous solutions, J. Appl. Polym. Sci., 104 (2007) 200.
• O. Ozay, S. Ekici, Y. Baran, N. Aktas, N. Sahiner, Removal of toxic metal ions with magnetic hydrogels, Water Res., 43 (2009) 4403.
• O. Ozay, S. Ekici, Y. Baran, S. Kubilay, N. Aktas, N. Sahiner, Utilization of magnetic hydrogels in the seperation of toxic metal ions from aqueous environments, Desalination, 260 (2010) 57.
• O.B. Uzum, S. Kundakci, E. Karadağ, Uranyl ion uptake from aqueous solutions by chemically cross- linked polyelectrolyte CAMA hydrogels, Polym. Plastic. Technol. Eng., 46 (2007) 775.
• N. Sahiner, M. Singh, In situ micro/nano-hydrogel synthesis from acrylamide derivates with lecithin organogel system, Polymer, 48 (2007) 2827.
• M.A. Barakat, N. Sahiner, Cationic hydrogels for toxic arsenate removal from aqueous environment, J. Environ. Management, 88 (2008) 955.
• N. Pekel, N. Sahiner, O. Güven, Thermodynamics of absorption of uranyl ions onto amidoximated poly(acrylonitrile)/poly(N-vinyl 2-pyrrolidone) interpenetrating polymer networks, J. Polym. Sci. Part B-Polym. Phys., 42 (2004) 986.
• D. Saraydın, Y. Isikver, N. Sahiner, Uranyl ion binding properties of poly(hydroxamic acid) hydrogels, Polym. Bull., 47 ( 2001) 81.
• S. Ortaboy, E. Acar, G. Atun, S. Emik, T. Iyim, G. Guclu, S. Ozgumus S, Performance of acrylic monomer based terpolymer/montmorillonite nanocomposite hydrogels for UO(VI) removal from aqueous solutions, Chem. Eng. Res. Design, 91 (2013) 670.
• N. Pekel, N. Sahiner, P. Akkas, O. Guven, Uranyl ion adsoptivity of N-vinyl 2-pyrrolidine/acryonitrile copolymeric hydrojels containing amidoxime groups, Polym. Bull., 44 (2000) 593.
• C. Liu, L. Zhong, J.M. Zachara, Uranium(VI) diffusion in low-permeability subsurface materials, Radiochim. Acta, 98 (2010) 719.
• J. Schafer, H.P. Nirmaier, P. Schmoll, K.H. Bauer, A. Meyer, Ultratrace determination of uranium (VI) drinking water by adsorptive stripping voltammetry according to DIN38406-17.
• S. Sahoo, A.K. Satpati, A.V.R. Reddy, Stripping voltammetric determination of uranium in water samples using hg-thin film modified multiwall carbon nanotube incorporated carbon paste electrode, Am. J. Anal. Chem., 4 (2013) 141.
• M.B. Gholivand, H. Rashidi Nassab, H. Fazeli, Cathodic adsorptive stripping voltammetric determination of uranium (VI) complexed with 2, 6-pyridinedicarboxylic acid, Talanta, 65 (2005) 62.
• S. Sander, G. Henze, Absorption voltammetric tehniques for the determination of uranium (VI) with 2,5-dichloro-3,6-dihydroxy-1,4 benzoquinone as complex forming agent, Fresenius J. Anal. Chem. 349 (1994) 654.
• H. Güler, N. Sahiner, G.A. Aycık, O. Güven, Development of novel adsorbent materials for recovery and enrichment of uranium from aqueous media, J. Appl. Polym. Sci., 66 (1997) 2475.
• N. Sahiner, S. Butun, P. Ilgin, Soft hydrogel particles with high functional value, Colloid. Surf. A: Physicochem. Eng. Aspect., 381 (2011) 74.
• T.B. Mostafa, Chemical modification of polypropylene fibers grafted vinyl imidazole/acrylonitrile copolymer prepared by gamma radiation and its possible use for the removal of some heavy metal ions, J. Appl. Polym. Sci., 111 (2009) 11.
• N. Pekel, Z.M.O. Rzaev, O. Güven, Synthesis and characterization of poly (N-vinylimidazole-co- acrylonitrile) and determination of monomer reactivity ratios, Macromol. Chem. Phys., 205 (2004) 1088.
• N. Sahiner, P. Ilgın, Synthesis and characterization of soft polymeric nanoparticles and composites with tunable properties, J. Polym. Sci. Part A: Polym. Chem., 48 (2010) 5239.
• O. Ozay, N. Aktas, N. Sahiner, Hydrogels as a potential chromatographic system: absorption, speciation, and separation of chromium species from aqueous media, Sep. Sci. Technol., 46 (2011) 1450.