GUI Shan, LIU Gonggang, JIANG Heng, et al. Synthesis of carboxymethyl polyamines chitosan and its adsorption properties for Ni(Ⅱ)[J]. CIESC Journal, 2015, (5): 1785-1791.
GUI Shan, LIU Gonggang, JIANG Heng, et al. Synthesis of carboxymethyl polyamines chitosan and its adsorption properties for Ni(Ⅱ)[J]. CIESC Journal, 2015, (5): 1785-1791.DOI: 10.11949/j.issn.0438-1157.20141197.
A novel amino acid functionalized polyamine carboxymethyl chitosan (CTGCS) was designed to improve adsorption ability of chitosan (CS) for heavy metals. Chitosan resin (GCS) was firstly obtained via cross-link reaction of chitosan and glutaraldehyde. After following modification by tetraethylenepentamine and chloroacetic acid
CTGCS was successfully synthesized. The samples at different reaction steps were characterized by using FTIR and XPS to understand reaction mechanism. Moreover
the adsorption ability of as-synthesized CTGCS for Ni2+ from aqueous solutions was investigated. The adsorption process conformed with the Freundlich isotherm model and could be fitted by the pseudo-second order kinetics model. The maximum adsorption capacity of CTGCS for Ni2+ was significantly improved up to 533.8 mg·g-1
about 1.5 times more than that of TGCS
indicating that CTGCS was a promising adsorbent for heavy metals.