Adsorption Performance for Ag(І) of an Ethoxycarbonyl Thiourea Chelating Resin

Abstract:

Effects of initial concentration of Ag(І), concentration of HNO₃, contact time and adsorption temperature on adsorption capacities of a novel polystyrene modified ethoxycarbonyl thiourea resin were investigated, and the maximum adsorption capacity of Ag(І) reached 4.11 mmol·g^-1. The adsorption kinetics was well fitted Boyd’s diffusion equation of liq·uid film, so the adsorption was controlled by liquid film diffusion. The experimental date fitted Langmuir equation, and the correlation coefficient was close to 1. The positive value of adsorption enthalpy ΔH is indicative of an endothermic process. FT-IR characteristic peaks of ethoxycarbonyl and thiourea groups changed obviously fore-and-aft adsorption, which means that the corresponding functional groups coordinate with Ag during the adsorption process.

• Periodical: Advanced Materials Research (Volumes 311-313)
• Pages: 1077-1080
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.311-313.1077
• Online since: August 2011
• Authors: Shuai Wang, Jing Jing Xiao, Hong Zhong, Gang Zhao, Yan Long Wen
• Keywords: Adsorption, Ag(ι), Chelating Resin, Ethoxycarbonyl Thiourea Resin

References

[1] Radi S, Ramdani A, Lekchiri Y, Morcellet M, Crini G, Morcellet J and Janus L: European Polymer Journal, Vol. 36(2000), p.1885

DOI: 10.1016/s0014-3057(99)00274-8

[2] Shah R and Devi S: Talanta, Vol. 45(1998), p.1089

[3] Wang Shuai, Zhong Hong, Liu Guangyi, Zhang Qian and Li Ting: Journal of Central South University of Technology, Vol. 15(2008), p.463

[4] Peng Yaqin, Zhong Hong and Wang Shuai: Precious Metals, Vol. 31(2010), p.25 (in Chinese)

[5] Wang Shuai, Zhong Hong, Xia Liuyin, Wang Zhongnan and Zhang Qian: Advanced Materials Research, Vol. 239-242 (2011), p.781

[6] Garcia-Deigado R A and Cotoruelo L M: Separation Science and Technology, Vol. 27(1992), p.975