林产化学与工业Issue(5)：97-102,6.DOI:10.3969/j.issn.0253-2417.2014.05.016
锆交联葡甘聚糖凝胶球的制备及吸附性能
Preparation and Adsorption Behaviors of Konjac Glucomannan Gel Micropheres Crosslinked with Zr
摘要
Abstract
The zircon cross linked with carboxyl methyl konjac glucomannan gel microspheres ( CMKGM-Zr ) were prepared by crosslinking oxygen zirconium ion ( ZrO2+) and carboxyl methyl konjac glucomannan ( CMKGM ) which was obtained through rectifying konjac glucomannan( KGM) with carboxyl-methyl. Structure of the CMKGM-Zr was characterized by scanning electron microscopy and the change between pre-and post-adsorption reaction was analyzed by infrared spectroscopy. On this basis, the adsorption capacity of CMKGM-Zr for benzoic acid was studied. And the parameters, including the adsorption time and pH were investigated. Further, according to adsorption isotherms of CMKGM-Zr for benzoic acid, thermodynamic parameters of the adsorption process were calculated and the experimental data were fitted. The results showed that the gel microspheres prepared with 2. 0 % CMKGM and ZrO2+ were white irregular geometry of hollow spheres and the mechanical strength was 15. 3 g. The reaction between ZrO2+ and -COO- occurred after adsorption of benzoic acid. When the temperature 298 K, pH 4. 5, and the concentration of benzoic acid 200 mg/L were used, the adsorption equilibrium was established about 4 hours. And the dsorption capacity of CMKGM-Zr for benzoic acid reached the maximum of 79. 964 2 mg/g. Freundlich equation was suitable for the adsorption of the studied system. Adsorption driving forces were the enthalpy change and entropy change.关键词
葡甘聚糖/羧甲基化/苯甲酸/锆凝胶球/吸附Key words
konjac glucomannan ( KGM)/carboxyl methyl/benzoic acid/zircon gel microphere/adsorption分类
化学化工引用本文复制引用
李建凤,廖立敏,李祥蓉,王碧..锆交联葡甘聚糖凝胶球的制备及吸附性能[J].林产化学与工业,2014,(5):97-102,6.基金项目
四川省教育厅自然科学重点项目(20122A-84) （20122A-84）
