Preparation of Amino-Salicylic Acid Modified Tannin-Based Resin and Its Adsorption Performance of Ag(I)

Abstract

Abstract: The chlorinated tannins were prepared by chlorination of Bayberry Tannin with dichlorosulfoxide,then cross-linked with amino-salicylic acid to synthesize salicylic modified tannins,and then cross-linked with paraformaldehyde to obtain salicylic acid tannin-based resin.FTIR characterized the structure of the tannin-based resin.The effects of solution pH,initial concentration of Ag(I),temperature,and time on the adsorption performance were investigated.The experiments showed that the maximum adsorption of Ag(I) by the resin could reach 239.6 mg/g at the temperature of 318 K,pH of 5.0,and the initial concentration of Ag(I) of 260 mg/L.The adsorption thermodynamics indicated that this material's adsorption process of Ag(I) was in accordance with the Langmuir adsorption isotherm model and the quasi secondary kinetic model.It can be concluded that the amino-salicylic acid modified tannin-based resin has good Ag(I) adsorption performance.

Key words: amino-salicylic acid modified tannin-based resin, adsorption performance, Ag(I)

LI Jialing, HUANG Qianlan, ZHANG Aihua, PENG Zhiyuan. Preparation of Amino-Salicylic Acid Modified Tannin-Based Resin and Its Adsorption Performance of Ag(I) [J]. Journal of Jishou University(Natural Sciences Edition), 2024, 45(1): 42-47.

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