Preparation of Arsenate Anion Surface-Imprinted Material IIP-PDMC/SiO sub(2) and Study on Its Ion Recognition Property

• Published in: Industrial & engineering chemistry research Vol. 52; no. 23; pp. 7651 - 7659-7651-7659
• Main Authors: Gao, Baojiao, Du, Junmei, Zhang, Yanyan
• Format: Journal Article
• Language: English
• Published: 12.06.2013
• Subjects: Anion exchanging; Anions; Arsenates; Bulk molding compounds; Grafting; Monomers; Recognition; Silicon dioxide
• ISSN: 0888-5885; 1520-5045
• DOI: 10.1021/ie400440k

By molecular design, a new ion surface-imprinting technique was set up based on surface-initiated graft-polymerization, and arsenate anion surface-imprinted material with high performance was prepared for the first time. A redox initiating system was constituted by the amino groups on the surface-modified silica gel particles and the ammonium persulphate in the solution. The cationic monomer 2-methacryloyloxyethyl-trimethyl ammonium chloride (DMC) was used as functional monomer and N,N'-methylenebisacrylamide (MBA) was used as cross-linker. In the solution, the monomer molecules were arranged around the template ion, arsenate anion, via ion exchange action, and then the arsenate anion surface-imprinting was carried out along with the surface-initiated graft-polymerization of DMC and MBA, forming arsenate anion surface-imprinted material IIP-PDMC/SiO sub(2). The experimental results show IIP-PDMC/SiO sub(2) possesses specific recognition selectivity and excellent binding affinity for arsenate anion. The selectivity coefficients of IIP-PDMC/SiO sub(2) for arsenate anion are 8.814 and 7.898 relative to chromate and nitrate ions, respectively.