研究生学术报告预告登记(开题、中期、答辩)

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报告人: 郭双祯
学号: 1015214040
学院: 环境科学与工程学院
报告类型: 其他学术报告
日期: 2017年10月26日
时间: 09:05
地点: 43教A302
导师: 段宁
题目: In situ graft carboxyl on magnetic silica gel and its adsorption performance
内容提要:

A novel magnetic silica gel adsorbent(Fe3O4-Si-COOH) was successfully prepared by introducing carboxyl group in situ to improve the performance for Pb(II), Zn(II) and Cd(II) adsorption. FT-IR, SEM, TEM, TGA, BET, XRD and VSM characterization suggested that Fe3O4-Si-COOH has been successfully prepared. The adsorption performance was evaluated by batch experiments with different initial concentration, ionic strength, contact time and pH. The adsorption kinetics data followed pseudo-second-order model and exhibited 3-stage intraparticle diffusion mode. Isothermal adsorption equilibrium data were best fitted by Freundlich model and the adsorption capacity were 155, 110, and 93 mg/g (initial concentration: 210 mg/L) for Pb(Ⅱ), Zn(Ⅱ) and Cd(Ⅱ), respectively. In addition, the metal ions adsorbed adsorbent could be regenerated and the adsorption capacity of reused adsorbent could maintain 80.3% after five cycles. Hence, the Fe3O4-Si-COOH could be a kind of potential material for removing Pb(II), Zn(II) and Cd(II) from wastewater

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登记人: 郭双祯
登记时间: 2017年11月17日 星期五 10:42
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