印染助剂2017，Vol.34Issue(1)：12-17,6.
废羊毛对三价铬离子络合物的吸附研究
Study on adsorption of waste wool on trivalent chromium ion complexes
摘要
Abstract
Citric acid and oxalic acid were chosen as ligands to coordinate with Cr3+, and then the com⁃plex was adsorbed by scraped wool. A proper model was established for the adsorption process. The adsorp⁃tion behavior was described and the adsorption mechanism was discussed. The adsorption data were fitted by Langmuir and Freundlich adsorption isotherm equation, the result proved that the Langmuir adsorption iso⁃therm was the main adsorption behavior of Cr3+. The adsorption kinetics data showed that the pseudo sec⁃ond- order equation could wel describe the adsorption behavior. The thermodynamic parameters showed that the adsorption of Cr3+ was a spontaneous endothermic reaction, increasing temperature was conducive to the reaction. The infrared spectroscopy of Cr3+ complex showed that the coordination ability of oxalate was the strongest. The infrared spectroscopy of waste wool before and after adsorption indicated that adsorption was the result of the electrostatic binding and complexation. Final y, the adsorption of waste wool to three kinds of ligand was evaluated as citric acid- chromium complex>oxalic acid- chromium complex>sulfosalicylic acid- chro⁃mium complex.关键词
吸附/Cr3+/废弃羊毛/废水/配位Key words
adsorption/trivalent chromic ion/waste wool/waste water/coordination分类
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晋平平,贺江平,伍展辉..废羊毛对三价铬离子络合物的吸附研究[J].印染助剂,2017,34(1):12-17,6.
