عنوان مقاله [English]
Lobster shells from Konarak Port were collected in October 2002, purified, and dried for the purposes of the present study. Chitin was extracted from the shellsusing the common chemical processes of demineralization, proteinzation, and decolonization, beforepurificationwith 1% CH3COOH and 1% NaCl to obatin an extract containing 12% (w/w) chitin. Chitin composition was determined using FT-IR, X-Ray powder diffraction, BET, and C.H.N.S analysis. The FT-IR spectrum of the extracted chitin was corresponded well to the Merck standard one, indicating that it is a linear polymer of N-acetyl-D- glucosamine on which metal ions can be adsorbed. Kinetic study of chitin’s reaction with Zn+2 at pH=6.75 and an ionic strength of 0.02 M indicated that adsorption equilibrium was reached within six hours of mixing. Adsorption Langmuir isotherms for a solution of Zn+2, Cd+2, and Pb+2 ions at an initial concentration of 2×10‒3 M were determined for an ionic strenght of 0.02 M, different pH levels, and at ambient temparature using the discontinued in-pot method. The maximum amounts of metal ions adsorbed on chitin at pH= 6.75 were measured to be 0.119 mol/kg for Cd+2, 0.714 mol/kg for Zn+2, and 1.630 mol/Kg for Pb+2. The overdyeing graphs, Cs= f (pH), show that the adsorption capacity of chitin is influenced by such factors as pH, reaction time, metal ion concantration, and adsorbent particle size. Thus, chitin as a non-toxic natural polymer may be highly recommended for water detoxification from heavy metal ions.
1. Knorr, D. (1984) “Use of chitinous polymer in food –A-chal-lenge for food research and development.” Food Technol., 38, 85-97.
2. Roberts, G.A.F.(1992). Chitin chemistry, Mac Millan, London.
3.Huang ,G., and Chen, Y. (1996) “Coagulation of colloidal particales in water by chitosan.” J. Chem. Tech. and Biotech., 66 (3), 227-232.
4. Duarte, M.L., Marvao, M. C., and Rocha, M.R.(2001) “Determination of the degree of acetylation of chitin materials by 13C CP/MAs, NMR spectroscopy.” International Journal of Biological Macromolocule, 28 (5), 359-363.
5. Loughinotti, E., Pozza, F., Fur lan, L., Sanchez Maria de Nazare de, M., and Marilene, K. (1998). “Adsorption of anionic DYE SOM the biopoly chitin.” J.Bra.Chem. Soc., 9 (5), 435-440.
6. Madhavan, P. (1992). Chitin, chitosan and their novel applications, popular science lecture series, Central Institute of Fisheries Technology, Cochin, pp. 44.
7. Mathur, N.K., and Narang, C.(1990). “Chitin and chitosan, versatile polysaccharides from marine animals.” J. of Chemical Education, 67, 938-942.
8. Roger, J. K. (1989). The signal library of FT-IR spectra, 1st Ed., Milwaukee.
9. Nicol, S.(1991). “Life after death for empty shells.” New Scientist.” 129, 46-48.
10. Dabiri, M. (2000). Environmental pollution (air _water, soil and sound), Publication of Liar, Tehran, Iran.
11. Arbia, W., Arbia, L., Adour, L., and Amrane, A. (2012) “Chitin extraction from crustacean shells by biological methods, A review.” Food Technol. Biotechnol., 51, 12-25.
12. Shahidi, F., Janak Kamil Vidana, A., You – Jin, J. (1999). “Food application of chitint and chitosan.” Trends in Scinences and Technology, 10, 35-71.
13. Brugnerotto, J., Lizardi, J., Goycoolea, F.M., Arguelles-Monal, W., Desbrieres, M., and Rinauda, J.(2001). “An infrared investigation in relation with chitin and ghitosan characterization.” Polymer, 42 (8), 3569-3580.
14. Juang, R.S., and Shao, S-J.(2002). “A simplified equilibrium model for sorption of heavy metal ions from aqueous solutions on chitosan.” Water Reasearch, 36, 2999-3008.
15. Dzui Erosa, M.S., Sauced o Medina, T.J., Novarro Mendoza, R., Avila Rodrig Uez, M., and Guibal, E. (2001). “Cadmium sorption on chitosan sorbents: Kinetic and equilibrium studies.” Hydrdmetallurgy, 51, 157-167.
16. Ravi, D., Antony Paul, A.J., Alex Kuriakose,V.J., and Rajesh, R. (2012) “Adsorption of nickel(II) and chromium (VI0 ions by chitin and chitosan from aqueous solutions containing both ions.” Tis, T.Int. J.Sci. Tech. Res., 1, 43-50.
17. Yavari, I., and Thamy, M. (1994). “Extraction of chitin from the tough shells (panulirus, portuns, lobster).” Iranian Scientific Fisheries Journal, 1, 17-27.
18. Yavari, I., and Thamy, M. (1994). “Preparation of glucosamine and chitosan from the tough shells (Panulirus, Portuns, Lobster).” Iranian Scientific Fisheries Journal, 1, 5-15.
19. Rhazi, M., Desbrieriecs, J., and Tollaimate, A. (2002). “Contribution to the study of the complexation of copper by chitosan and Lgomera.” Polymer, 43,1267-1276.
20. Sardashti, A., Arami, M., and Badin, H. A. (2004). “Adsorption studies of Zn, Cd ions on extracted chitin from lobster of Oman sea.”13th Iranian Seminar of Analytical Chemistry, Ferdowsi University of Mashhad. (In Persian)
21. Monteirs, Jr., and Airoldic, O. Ac. (1999). “Some thermodynamic data on copper-chitin and copper-chitoson biopolymer interactions.” J. Colloid Interface Sci., 212(2), 212-219.
22. Schlick, S. (1986). “Binding sites of Cu(II) in chitin and chitosan.” An Electron Spin Resonance Study Macromolecules, 19,192-195.
23. Chui, V. W. D., Mok, K.W., Ng, C.Y., Luong, B. P., and Ma, K. K.(1996). “Removal and recovery of copper(II), chromium(III) and nickel (II) from solutions using crude shrimp chitin packed in small columns.” Environment International, 22 (4), 163-168.
24. Sambasivan, M. (1992). “Chitosan and it’s haesnostatic activity.” Popular Science Lecturies, Cent. Inst. Fish, Technol., Cochin, India.
25. Kondo, K., Sumi, Hu. (1996). “Adsorption characteristics of metal ions on chitosan chemically modified by D-galactose.” Separation Science and Technology, 31(12), 1771-1775.
26.Merck Index. (1998). <http://www.Merch.com>, pp:259.
27.Ornum, V.J. (1992). “Shrimp waste-must it be wasted.” Infofish International, 6, 48-52.
28. Asadpour, Y.A., Ghoroghi, A., Shojaosadati, S.A., Kalbassi, M.R., and Khosrowshahi, A.A. (2004). “Determination of chemical and biochemical composition of Artemia urmiana cyst shells and its extraction chitin.” Iranian Scientific Fisheries Journal, 12, 1-12.
29. Inoue, K., Yoshizuka, K., and Baba, Y.(1998). “Selectivity series in the adsorption of metal ions on a resin prepared by cross linking of copper(II) complexed chitosan.” Chem. Lett., 12, 81-84.
30. Jang, L.K., Nguyen, D., and Geosey, G.G. (1999) “An equilibrium model for adsorption of multiple divalent metals by alginate ge1 under acidic conditions.” Water Res., 33, 2826-2832.
31.Alidoost, M., and Sardashti, A.R. (2006). “Study of extracted humic acid from the soil of Naharkhoran forest in Goran.” MSc Thesis of Analytical Chemistry, University of Sistan and Baluchestan, Zahedan, Iran. (In Persian)
32. Gozalez-Davila, M., Santana-Casiano, J.M., and Millaro, F.J.(1990). “The adsorption of Cd(II) and Pb(II) to chitin in sea water.” J. Colloid in Terface Sci., 137, 102-110.
33. Yoshinari, T., and Subramanian, V. (1997). Adsorption of metal by chitin.environmental biogeochemistry, Ann Arbor, Chicago.
34.Yang, J., and Volesky, B.(1999). “Modeling uranium-proton ion exchange in biosorption.” Environ. Sci., Technol., 33, 4079-4085.
35. Role Wachter, R., Hofmann, R., and Henkel-reforate, J. (1996). “Chimistry and technology of water-soluble polymers.” J. of British Polymer, 15(4), 243.