Polystyrene degraded and functionalized with acrylamide for removal of Pb(II) metal ions
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The present study describes the synthesis of a new material prepared by low-temperature thermocatalytic degradation of polystyrene (PS) by using zeolite clinoptilonite as a degradation template and subsequent functionalization with acrylamide (AAm) for the removal of lead (Pb(II)) metal ions from aqueous solutions. Infrared spectroscopy (FTIR), field emission scanning electron microscopy, thermogravimetric analysis and differential scanning calorimeter techniques confirm the successful functionalization of PS oligomers, before applying this material as an alternative adsorbent. A preliminar absorption study using functionalized PS oligomers as an adsorbent indicates that material has a good potential to absorb heavy metal of Pb(II) from the aqueous solutions. Equilibrium data show a maximum adsorption capacity of 33.85 mg g−1 with a percentage removal of 90.94%, which fitted well with Freundlich model and kinetic data were best described by pseudo-second-order model. Desorption studies revealed that PS oligomers functionalized with acrylamide as monomer source can be recovered using 0.5 M EDTA as regenerating agent, with a maximum recovery of Pb(II) metal ions of 97.28%. These results reveal that PS oligomers functionalized with acrylamide could be recommended as a promising adsorbent for Pb(II) metal ions contained in aqueous systems.
KeywordsPolystyrene Free radical polymerization Chemical functionalization Lead removal Thermocatalytic degradation
Authors thank to PAICYT-UANL (CE327-15) for financial support J.P.R. Thanks for the scholarship from CONACYT. Funding was provided by Universidad Autónoma de Nuevo León.
- 3.Dai Lam T, Van Chat N, Bach VQ, Loi VD, Van Anh N (2014) Simultaneous degradation of 2, 4, 6-trinitrophenyl-N-methylnitramine (Tetryl) and hexahydro-1, 3, 5-trinitro-1, 3, 5 triazine (RDX) in polluted wastewater using some advanced oxidation processes. J Ind Eng Chem 20:1468–1475. https://doi.org/10.1016/j.jiec.2013.07.033 CrossRefGoogle Scholar
- 4.Karimnezhad H, Salehi E, Rajabi L, Azimi S, Derakhshan AA, Ansari M (2014) Dynamic removal of n-hexane from water using nanocomposite membranes: serial coating of para-aminobenzoate alumoxane, boehmite-epoxide and chitosan on Kevlar fabrics. J Ind Eng Chem 20:4491–4498. https://doi.org/10.1016/j.jiec.2014.02.021 CrossRefGoogle Scholar
- 14.Kim SH, Song H, Nisola GM, Ahn J, Galera MM, Hee Lee C, Chung WJ (2006) Adsorption of lead(II) ions using surface-modified chitins. J Ind Eng Chem 12:469–475Google Scholar
- 22.Bulbul Sonmez H, Senkal BF, Sherrington DC, Bıcak N (2003) Atom transfer radical graft polymerization of acrylamide from N-chlorosulfonamidated polystyrene resin, and use of the resin in selective mercury removal. React Funct Polym 55:1–8. https://doi.org/10.1016/S1381-5148(02)00193-1 CrossRefGoogle Scholar
- 27.Lagregren S (1898) About the theory of so-called adsorption of soluble substances. Kungliga Svenska Vetenskapsakademiens Handlingar 24:1–39Google Scholar
- 28.Weber WJ, Morris JC (1963) Kinetics of adsorption on carbon from solution. J Sanit Eng Div Am Soc Chem Eng 89:31–59Google Scholar
- 31.Martins AC, Pezoti O, Cazetta AL, Bedin KC, Yamazaki DAS, Bandoch GFG, Asefa T, Visentainer JV, Almeida VC (2015) Removal of tetracycline by NaOH-activated carbon produced from macadamia nut shells: kinetic and equilibrium studies. Chem Eng J 260:291–299. https://doi.org/10.1016/j.cej.2014.09.017 CrossRefGoogle Scholar
- 40.Yigitoglu M, Arslan M, Sacak O, Unal HI (2002) Adsorption behavior of copper (II) ion from aqueous solution on 4-vinyl pyridine/2-hydroxyethylmethaacrylate mixture grafted poly(ethylene terephathalate) fibers. J Biol Chem 31:133–143. https://doi.org/10.1002/(SICI)1097-4628(20000207)75:6%3c766:AID-APP5%3e3.0.CO;2-B Google Scholar
- 43.Shokoohi R, Saghi MH, Ghafari HR, Hadi M (2009) Biosorption of iron from aqueous solution by dried biomass of activated sludge. Iran J Environ Health Sci Eng 6(2):107–114Google Scholar