Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7683320 | Talanta | 2013 | 8 Pages |
Abstract
The ability of solid N-propyl quaternized magnetic poly(4-vinylpyridine) for the extraction of chromium(VI) in aqueous solutions was investigated. For the synthesized Cr(VI) magnetic polymers, the optimum pH obtained was 4 for both the magnetic ion imprinted polymer (IIP) and the corresponding non-ion imprinted polymer NIP. The amount of the adsorbent which gave the maximum adsorption was determined to be 20 and 65 mg for the magnetic IIP and NIP, respectively. A Cr(VI) concentration which was adsorbed maximally was 5 mg Lâ1 which was therefore taken as the optimum. The maximum adsorption capacities for the magnetic polymers were 6.20 and 1.87 mg gâ1 for the magnetic IIP and NIP, respectively. The optimum time for the adsorption of the Cr(VI) analyte was determined as 40 min. The prepared magnetic ion imprinted polymer showed good selectivity towards Cr(VI). The order of selectivity of the investigated anions followed the sequence: Cr2O72â>SO42â>Fâ>NO3â.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Nikita Tawanda Tavengwa, Ewa Cukrowska, Luke Chimuka,