Adsorption of Cu (II) on Thiourea Impregnated Gelatin Microspheres

Abstract:

In this study, we describe a novel adsorbent, thiourea impregnated gelatin microspheres(TIGM) which were synthesized from thiourea impregnated gelatin by inverse suspension polymerization with glutaraldehyde as crosslinker. With the aim to investigate the absorption kinetics of Cu(II) on TIGM, the absorption equilibrium, the effects of temperature on the absorption was fully discussed. It was found that this adsorbent is effective for the removal of Cu(II) from aqueous solutions. Results of the experiments presented that the thiourea was uniformly dispersed in microspheres mainly through chemical bonds, and the adsorption isotherms of Cu(II) on TIGM fits well both with the classical Freundlich equation and the Langmuir equation. It was also suggested that the adsorption rate of Cu (II) was faster at higher temperature, and the amount of the adsorption also increases with the increasing of temperature. According to the research, the maximal adsorption capacity is obtained when pH is 5 to 9, and the adsorption kinetics of Cu(II) onto TIGM could be described by pseudo-first-order rate mode.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 187-191
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.187
• Online since: January 2013
• Authors: Li Li Yu, Lin Yao
• Keywords: Adsorption, Cu(II), Desorption, Gelatin Microspheres, Thiourea

References

[1] S. A.Mashi and M. M. Alhassan, Effects of Wastewater Discharge on Heavy Metals Pollution in Fadama Soils in Kano City, Nigeria. Biomedical and Environmental Sciences. Vol.22(2007), p.70.

[2] Rios-Arana J V, Walsh E J, Gradea-Torresdey J L, Assessment of arsenic and Heavy metal concentrations in water and sediments of the Rio Grande at El Paso-Juarez metroplex region. Environment International. Vol. 29 (2003), p.957.

DOI: 10.1016/s0160-4120(03)00080-1

[3] Ma Ning, Wang Qin, Sun Sheng-ling, Wang Ai-qin. Progress in Chemical Modif ication of Chitin and Chitosan. Progress in Chemistry. Vol. 16 (2004), p.643.

[4] Peters, R. W. Chelant extraction of heavy metals from contaminated soils. Hazard. Mater. Vol. 66 (1999), p.151.

[5] Malgorzata Lipowska, Lory Hansen, Andrew Taylor, Jr., and Luigi G. Marzilli. Synthesis and Characterization of Rhenium(V) Oxo Complexes with a New Thiol-Amide-Thiourea Ligand System. X-ray Crystal Structure of [1-Phenyl-3-[2-((2- thioacetyl)amino)ethyl] thioureato] oxorhenium(V). Inorg.Chem. Vol. 35(1996), p.4484.

DOI: 10.1021/ic951449+

[6] Sum Cai-lan, Tian Gui-zhi, Xia Yu, Zhu Wen-hong. Study on Treatment of Gold Flotation Concentrate with Thiourea/CIP Process. Precious Metals. Vol. 28 (2007), p.1.

[7] Tang Qing-hua, Sun Lin, Hang Jiang, Liu Chun-ping, Synthesis and Adsorption Properties of Salicylic Acid-Thiourea Resin. Yantai Normal University Journal. Vol. 21 (2005), p.133.

[8] Li Hua, Lu Jian-mei, Zhang Zhen-biao, Wang Li-hua, Zhu Xiu-lin. Synthesis of Thiourea-resin by Microwave Irradiation and its Adsorption Properties. Journal of Chemical Engineering of Chinese Universities. Vol. 18 (2004), p.62.

[9] Reichenberg D. Properties of ion-exchange resins in relation to their structure III, kinetics of exchange. J. Am. Chem. Soc.. Vol. 75 (1953), p.589.

DOI: 10.1021/ja01099a022

[10] Boyd G E, Adamson A MeyERs L S. The exchange adsorption of ions from aqueous solutions by organic zeolites II Kinetics. J. Am. Chem. Soc.. (1969), p.2836.

DOI: 10.1021/ja01203a066

[11] McKay G., Ho Y. S. Pseudo-second-order model for sorption processes. Process Biochem. Vol. 34 (1999), p.451.

DOI: 10.1016/s0032-9592(98)00112-5