期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 192, 期 3, 页码 956-962出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2011.05.050
关键词
Poly(glycidyl methacrylate); 5-Aminosalicylic acid; Silica gel; Chelating adsorption; Heavy metal ions
资金
- Scientific Foundation of Province Shanxi of China
- National Scientific Foundation of China
In this study, 5-aminosalicylic acid was successfully grafted onto the poly(glycidyl methacrylate) (PGMA) macromolecular chains of PGMA/SiO(2) to obtain a novel adsorbent designated as ASA-PGMA/SiO(2). The adsorption properties of ASA-PGMA/SiO(2) for heavy metal ions were studied through batch and column methods. The experimental results showed that ASA-PGMA/SiO(2) possesses strong chelating adsorption ability for heavy metal ions, and its adsorption capacity for Cu(2+), Cd(2+), Zn(2+), and Pb(2+) reaches 0.42, 0.40, 0.35, and 0.31 mmol g(-1), respectively. In addition. pH has a great influence on the adsorption capacity in the studied pH range. The adsorption isotherm data greatly obey the Langmuir and Freundlich model. The desorption of metal ions from ASA-PGMA/SiO(2) is effective using 0.1 mol l(-1) of hydrochloric acid solution as eluent. Consecutive adsorption-desorption experiments showed that ASA-PGMA/SiO(2) could be reused almost without any loss in the adsorption capacity. (C) 2011 Elsevier B.V. All rights reserved.
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