Adsorption modification of the zeolite surface with chitosan
In order to modify the surface, thermal acid activation of the zeolite of the Chankanai deposit was conducted. It was found that the treatment of the mineral with acid at high temperature leads to a decrease in the content of Ca, Al and Sr in its composition. Adsorption of chitosan on the surface of thermoacid-activated zeolite was also studied. Processing of the adsorption isotherms according to Langmuir and Freundlich models showed that the maximum adsorption of chitosan on the zeolite surface is 30.1 mg/g and the Freundlich constant 1/n is 0.75. On the IR-spectra of chitosan-modified zeolite, a certain shift to the higher frequencies of the peak was found at the oscillation frequency of 1638 cm-1, which can be explained by the contribution of amino groups adsorbed on the surface of the mineral. The shift to the left of the peak at 581 cm-1, typical for aluminosilicate groups, is also an evidence of their interactions with chitosan. When studying the effect of chitosan concentration on the wetting of the modified zeolite powder, it was found that at concentration of 2.10-3 base mol/L, an increase in the wetting angle from 10° to 47° occurs due to surface overcharging. According to the data of adsorption, IR spectroscopy and wetting of the surface, the main mechanism for binding chitosan to the zeolite surface was due to the electrostatic interaction of polymer amino groups with silicate and aluminosilicate groups of the mineral, stabilized by hydrogen bonds between the OH-groups of the polymer and ≡Si-O-groups of the solid phase.
2 Celis R, Trigo C, Facenda G, Hermosin M, Cornejo J (2007) J Agr Food Chem 55:6650-6658
3 Zhang GC, Wu T, Li YJ, Huang XH, Wang Y, Wang GP (2012) Chem Eng J 191:306-313. Crossref
4 Wiles M, Huebner H, Afriyie-Gyawu E, Taylor R, Bratton G, Phillips T (2004) J Toxicol Env Health 67:863-874.
5 Wang M, Maki CR, Deng Y, Tian Y, Phillips TD (2017) Chem Res Toxicol 30(9):1694-1701 Crossref
6 Akhtar F, Andersson L, Ogunwumi S, Hedin N, Bergstrem L (2014) J Eur Ceram Soc 1643-16666 Crossref
7 Wang CC, Juang LC, Hsu TC, Lee CK, Lee JF, HuangFC (2004) J Colloid Interf Sci 273:80-86. Crossref
8 Nazarenko O, Zarubina R (2013) Energy Environ Eng 1(2):68-73. Crossref
9 Ackley MW, Rege SU, Saxena H (2003) Micropor Mesopor Mat 61:25-42. Crossref
10 Xie J, Li Ch, Chi L, Wu D (2013) Fuel 103:480-485. Crossref
11 Lasko C, Hurst M (1999) Environ Sci Technol 33(20):3622-3626. Crossref
12 Kołodynska D, Hałas P, Franus M, Hubicki Z (2017) J Ind Eng Chem 52:187-196. Crossref
13 Valenzuela Diaz FR, Souza Santos PD (2001) Quim Nova 24(3):345-353. Crossref
14 Wan Ngah WS, Teong LC, Toh RH, Hanafiah MAKM (2013) Chem Eng J 223:231-238. Crossref
15 Hower FW (1970) Clays and Clay Minerals 18:97-105.
16 Tavengwa NT, Cukrowska E, Chimuka L (2014) Water SA 40:623-630. Crossref
17 Mckay G, Blair HS, Garden JR (1982) J Appl Polym Sci 27(8):3043-3057. Crossref
18 Nesic AR, Velickovic SJ, Antonovic DG (2012) J Hazard Mater 209-210:256-263. Crossref
19 Lin J, Zhan Y (2012) Chem Eng J 200-202:202-213. Crossref
20 Sun H, Lu L, Chen X, Jiang Zh (2008) Appl Surf Sci 254:5367-5374. Crossref
21 Elaiopoulos K, Perraki Th, Grigoropoulou E (2010) Micropor Mesopor Mat 134:29-43. Crossref
22 Mozgawa W (2001) J Mol Struct 596:129. Crossref
23 Friedrichsberg DA (1995) Course of colloidal chemistry. Leningrad, Khimiya. P.31-37. (In Russian)
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