Determination of the effective diffusivity of cadmium(II) in calcium alginate beads

• Autorzy: Kwiatkowska-Marks S. , Wójcik M. , Kopiński L.
• Języki publikacji: EN

Abstrakty

EN

Effective diffusivity (De) of cadmium compounds was calculated in the beads. The study was carried out using two methods: a shrinking core model (SCM) method and a newly developed method named conductometric. It turned out to be a simple and effective method for the calculation of effective diffusivity of Cd(II) in alginate sorbents. The De values obtained by the two methods depended on the alginate content in the beads. However, SCM, in contrast to the conductometric method, gave De values increasing with increasing alginate levels in the beads and lower than the molecular diffusivity of Cd(II), this being inconsistent with the mechanism of diffusion in porous carriers. Hence, the conductometric method can be considered as one giving more reliable results, compared with the SCM method. Moreover, diffusion retardation coefficients for the alginate beads were calculated. Enhanced content of the biopolymer in the beads caused retardation of Cd(II) diffusion in the beads due to the decreasing calculated retardation coefficients with the increasing alginate contents in the beads.

Słowa kluczowe

EN

cadmium ions; alginate beads; effective diffusivity

• Wydawca: Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Bydgoszcz
• Czasopismo: Ars Separatoria Acta
• Rocznik: 2011
• Tom: No. 8
• Strony: 11--23
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Kwiatkowska-Marks S.

autor

Wójcik M.

autor

Kopiński L.

• University of Technology and Life Sciences, Faculty of Technology and Chemical Engineering Science, Bydgoszcz, Poland,

Bibliografia

• [1] Kula I., Ugurlu M., Karaoglu H., Celik A., 2008. Adsorption of Cd(II) ions from aqueous solutions using activated carbon prepared from olive stone by ZnCl2 activation. Bioresource Technol. 99, 492-501.
• [2] Volesky B., 1987. Biosorbents for metal recovery. TIBTECH 5, 96-101.
• [3] Volesky B., 2001. Detoxification of metal-bearing effluents: biosorption for the next century. Hydrometallurgy 59, 203-216.
• [4] Kratochvil D., Volesky B., 1998. Advances in the biosorption of heavy metals. TIBTECH 16, 291-300.
• [5] Veglio F., Beolchini F., 1997. Removal of metals by biosorption: a review. Hydrometallurgy 44, 301-316.
• [6] Kwiatkowska-Marks S., Miłek J., Wójcik M., 2008. The effect of pH on the sorption of copper ions by alginates. Pol. J. Chem. Technol. 10, 28-30.
• [7] Chen J.P., Peng J., 2000. Uptake of Toxic Metal Ions by Novel Calcium Alginate Beads. Adv. Environ. Res. 3(4), 439-449.
• [8] Ibanez J.P., Umetsu Y., 1999. Uptake of Copper from Extremely Dilute Solutions by Alginate Sorbent Material: an Alternative for Enviromental Control. Proceedings of Copper 99-Cobre 99 International Enviroment Conference 387-397.
• [9] Ibanez J.P., Umetsu Y., 2000. Removal of Heavy Metal Ions by Using Alginate Beads. Proceedings V International Conference on Clean Technologies for the Mining Industry, Santiago-Chile 49-59.
• [10] Jang K.L., Lopez S.L., Eastman S.L., Pryfogle P.,1991. Recovery of Copper and Cobalt by Biopolymer Gels.Biotechnol. Bioeng. 37, 266-273.
• [11] Konishi Y., Shimaoka J., Asau S., 1998. Sorption of rare-earth ions on biopolymer gel beads of alginic acid. React. Funct. Polym. 36, 197-206.
• [12] Chen D., Lewandowski Z., Roe F., Surapaneni P., 1993. Diffusivity of Cu(II) in Calcium Alginate Gel Beads. Biotechnol. Bioeng. 41, 755-760.
• [13] Jang L.K., 1994. Diffusivity of Cu2+ in Calcium Alginate Gel Beads. Biotechnol. Bioeng. 43, 183-185.
• [14] Apel M.L., Torma A.E., 1993. Determination of Kinetics and Diffusion Coefficients of Metal Sorption on Ca-Alginate Beads. Can. J. Chem. Eng. 71, 652-656.
• [15] Froment G.F., Bischoff K.B., 1979. Chemical Reactor Analysis and Design. John Wiley and Sons, USA.
• [16] Holan Z.R., Volesky B., 1994. Biosorption of Pb and Ni by biomass of marine algae. Biotechnol. Bioeng. 43, 1001-1009.
• [17] Rao M.G., Gupta A.K., 1982. Ion Exchange Process Accompanied by Ionic Reactions. Chem. Eng. J. 24, 181-190.
• [18] Volesky B., 2003. Biosorption process simulation tools. Hydrometallurgy 71, 179-190.
• [19] Lagoa R., Rodrigues J.R., 2007. Evaluation of Dry Protonated Calcium Alginate Beads for Biosorption Applications and Studies of lead Uptake. Appl Biochem Biotechnology 143, 115-128.
• [20] Papageorgiou S.K., Kouvelos E.P., Katsaros F.K., Nolan J.W., Le Deit H., Kanellopoulos N.K., 2006. Heavy metal sorption by calcium alginate beads from Laminaria digitata. J. Hard. Mater. B137, 1765-1772.
• [21] Papageorgiou S.K., Kouvelos E.P., Katsaros F.K., 2008. Calcium alginate beads from Laminaria digitata for the removal of Cu2+ and Cd2+ from dilute aqueous metal solutions. Desalination 224, 293-306.
• [22] Klimiuk E., Kuczajowska-Zadrożna M., 2002. The Effect of Poly(vinyl Alcohol) on Cadmium Adsorption and Desorption from Alginate Adsorbents. Pol. J. Environ. Stud. 11, 375-384.