木质素磺酸钠-壳聚糖聚电解质对铜离子的吸附性能

Abstract

Abstract: According to the theory of static action, sodium lignosulfonate-chitosan (SLS-CS) polyelectrolyte complex was prepared from alkaline lignin and chitosan. The structure of sodium lignosulfonate-chitosan (SLS-CS) polyelectrolyte was characterized by Fourier transform infrared (FT-IR) and X-ray powder diffraction(XRD). The adsorption property for copperions by sodium lignosulfonate-chitosan polyelectrolyte was also evaluated. The results indicated that NH₃⁺ was formed by the protonated amino groups of chitosan which formed sodium lignosulfonate-chitosan (SLS-CS) polyelectrolyte complex by reacting with —SO₃Na of sodium lignosulfonate through electrostatic adsorption. Compared with the sodium lignosulfonate and chitosan, the amorphous peak of chifosan tends to decrease, the arrangement of sodium lignosulfonate-chitosan (SLS-CS) polymer appears more ordered, intermolecular force is enhanced, the adsorption equilibrium time for copper ions is about 5 h, and the saturated adsorption capacity is 12.5 mg/g. The adsorption isotherm curve fits well with Freundich equation.

Key words: lignin, chitosan, lignosulfonate, sodium lignosulfonate-chitosan polyelectrolyte complex

CLC Number:

TQ35

WANG Chun-hai;AI Qing;ZHAO Yin-feng;BEI Ying;FANG Gui-zhen. Adsorption of Copper Ions by Sodium Lignosulfonate-chitosan Polyelectrolyte Complex[J]. , 2012, 32(1): 29-34.

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Adsorption of Copper Ions by Sodium Lignosulfonate-chitosan Polyelectrolyte Complex

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