Adsorption of Zn(II) on dialdehyde m-phenylenediamine starch.
A new chelating material dialdehyde m-phenylenediamine starch (DASMPA) was synthesized by reacting m-phenylenediamine with dialdehyde starch. The obtained material was characterized by element analysis and Fourier transform infrared (FT-IR) spectra. The FT-IR of DASMPA showed an absorption peak at 1605.95 cm(-1) indicating the formation of a Schiff base (C=N). Adsorption activity of DASMPA for Zn(2+) was also investigated in terms of contact time, pH, the initial Zn(II) concentration and temperature, the results revealed that pH = 5, t = 1 h were the optimal conditions. With the degree of substitution (DS) of the DASMPA increased, the adsorption capacity increased gradually. The adsorption equilibrium data correlated well with Freundlich isotherm. Moreover, lower temperature was preferable for the process as it was exothermic.
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China.
Jun-tao
JT
Liu
Zheng-ping
ZP
Dong
Wen
W
Ding
Ping
P
Zhao
Jian
J
Sun
Xiao-dong
XD
Jin
Rong
R
Li
D000327:Adsorption; D006863:Hydrogen-Ion Concentration; D010655:Phenylenediamines / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013213:Starch / Q000031:analogs & derivatives* / Q000737:chemistry; D015032:Zinc / Q000737:chemistry*
D010655:Phenylenediamines; D013213:Starch; C012880:dialdehyde starch; D015032:Zinc; C008381:3-phenylenediamine