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Citation: WANG Shuai, ZHONG Hong, WANG Ai-Ping, TIAN Xiao-Yan. Synthesis of Thiourea Resins and Their Adsorption for Metal Ions[J]. Chinese Journal of Applied Chemistry, ;2007, 24(8): 941-944. shu

Synthesis of Thiourea Resins and Their Adsorption for Metal Ions

1.
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083

Corresponding author: WANG Shuai,
Received Date: 22 September 2006
Available Online: 20 December 2006
Fund Project: 国家自然科学基金资助项目(20476105) (20476105)中南大学研究生教育创新工程(040107) (040107)

Chelating resins with thiourea groups in their main chains (PETU-Ⅰ~PETU-Ⅳ) were obtained the polyaddition of butyl bis (alkoxy carbonyl isothiocyanate) with diethylene triamine,triethylene tetraamine,tetraethylene pentamine,and polyethylene polyamine respectively.FTIR results show that the resins contain thiourea groups,and the resins show good thermal stability and swelling property.The adsorption of metal ions on PETU was investigated by batch tests.Adsorption capacities of the 4 kinds of resins for Au(Ⅲ) are 2.48,2.68,4.74 and 6.44 mmol/g respectively,those for Ag(Ⅰ) are 2.15,3.53,3.74 and 3.98 mmol/g respectively,and those for other ions such as Cu(Ⅱ) and Zn(Ⅱ) were below 0.36 mmol/g.The separation factors of PETU-Ⅳ for Au-Cu and Au-Zn are above 1 000,and that of PETU-Ⅱfor Ag-Cu and Ag-Zn are above 10,which justifies that PETU shows excellent adsorption and selectivity performance for Au(Ⅲ) and Ag(Ⅰ).The adsorption capacities of PETU decreased little in five adsorption-desorption cycles,which showed that PETU had good regeneration properties.
- thiourea resin,
- chelating resin,
- metal ions,
- adsorption
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