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Citation: LÜ Ji-Ping, LIU Zai-Man, MIAO Li-Jie. Synthesis of Dendrimer-like Polyamidoamine on Surface of Silica Gel and Its Adsorption for Fe(Ⅲ) from Aqueous Solution[J]. Chinese Journal of Applied Chemistry, ;2008, 25(2): 229-232. shu

Synthesis of Dendrimer-like Polyamidoamine on Surface of Silica Gel and Its Adsorption for Fe(Ⅲ) from Aqueous Solution

1.
School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070

Corresponding author: LIU Zai-Man,
Received Date: 8 February 2007
Available Online: 8 August 2007
Fund Project: 兰州交通大学"青蓝"人才工程资助项目(QL-05-21A) (QL-05-21A)

Amino functional silica gel was synthesized by reacting silane coupling agent with silica gel.Then dendrimer-like polyamidoamine on the silica gel surface(PAMAM-SG) was prepared using Micheal addition of the amino and methyl acrylate,and ester-exchange of ethylene diamine and the ester group.FTIR was used to characterize the structure of PAMAM-SG.The effects of solution pH,concentration and temperature on the adsorption capacity of PAMAM-SG for Fe(Ⅲ) were studied.It was found that the optimum pH range for the adsorption was 3.0~6.0.The adsorption rate decreased with the increase of time,but increased remarkably with temperature.The adsorption was saturated in 3 h at 40℃,and the adsorption capacity reached 55.85 mg/g.The adsorption capacity increased with the increase of concentration until it reached balance.The adsorption capacities for each generation of PAMAM-SG were in the order of 2.0 G > 1.0 G > 1.5 G > 0.5 G > 0 G.
- silica gel,
- PAMAM,
- synthesis,
- adsorption
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