Adsorption removal of Congo red by epichlorohydrin-modified cross-linked chitosan adsorbent. Issue 30 (26th June 2016)

• Record Type: Journal Article
• Authors: Li, Chunguang; Cui, Jiehu; Wang, Fan; Peng, Weigong; He, Yanhong
• Is Part Of: Desalination and water treatment. Volume 57:Issue 30(2016)
• Page Start: 14060
• Page End: 14066
• Publication Date: 2016-06-26
• Subjects: Chitosan -- Congo red -- Modify -- Adsorption -- Epichlorohydrin; Saline water conversion -- Periodicals; Saline water conversion; Water -- Purification; Periodicals; 628.167
• DOI: 10.1080/19443994.2015.1060904
• Languages: English
• ISSNs: 1944-3994

Abstract

Abstract: A new cross-linked chitosan-based adsorbent was prepared by the cross-linked reaction between chitosan and epichlorohydrin under alkaline conditions. The chemical structure of this new adsorbent was characterized by infrared spectra analysis. The static adsorption using Congo red solution as simulated dye wastewater was investigated. The results suggested that there was an increased surface roughness and granular material on the cross-linked chitosan adsorbent surface and that the adsorption capacity of the modified chitosan adsorbents was higher than the parent chitosan. It was found out that adsorption behavior match well with Freundlich isotherm and pseudo-second-order kinetic models. The optimal conditions about the adsorption of Congo red are as follow: The dosage of modified chitosan was 30 mg/25 mL, the pH was 4, the time was 120 min, and the temperature was 40°C.