Removal of Copper, Nickel and Zinc Ions from Aqueous Solution by Chitosan-8-Hydroxyquinoline Beads

✍ Scribed by Francisco C. F. Barros; Francisco W. Sousa; Rivelino M. Cavalcante; Tecia V. Carvalho; Francisco S. Dias; Danilo C. Queiroz; Luiz C. G. Vasconcellos; Ronaldo F. Nascimento

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 717 KB
• Volume: 36
• Category: Article
• ISSN: 1863-0650
• DOI: 10.1002/clen.200700004

✦ Synopsis

Abstract

In this work, 8‐hydroxyquinoline is used as the active sites in cross‐linked chitosan beads with epichlorohydrin (CT‐8HQ). The CT‐8HQ material was shaped in bead form and used for heavy metal removal from aqueous solution. The study was carried out at pH 5.0 with both batch and column methods and the maximum adsorption capacity of metal ions by the CT‐8HQ was attained in 4 h in the batch experiment. The adsorption capacity order was: Cu^2+^ > Ni^2+^ > Zn^2+^ for both mono‐ and multi‐component systems with batch conditions. From breakthrough curves with column conditions, the adsorption capacity followed the order Cu^2+^ > Zn^2+^ > Ni^2+^ for both mono‐ and multi‐component systems. The CT‐8HQ beads maintained good metal adsorption capacity for all five cycles with absorbent restoration achieved with the use of 1.0 mol L^–1^ HCl solution, with 90% regeneration.