【摘要】 本论文以天然高分子材料淀粉及天然黏土材料凹凸棒为原材，以环氧氯丙烷为交联剂，采用溶胶-凝胶法，通过调节淀粉与凹凸棒投料比，制备了一系列不同含量比例（质量比为：3:1～1:10）的凹凸棒-淀粉复合吸附剂材料（Starch-attapulgite,ST-ATP），分别以甲基橙（Methyl orange, MO）和结晶紫（Crystal violet, CV）为阴、阳离子型染料代表，详细考察了ST-ATP对上述两种染料的吸附性能。结果表明，当淀粉与凹凸棒复合比为1:8和1:4时，分别对CV和MO的吸附效果达到最佳，分别为218mg/g和144mg/g，这是由于虽然淀粉本身对上述两种染料均没有吸附效果，但此时凹凸棒在高分子基体中具有良好的分散性，两者协同效应使得其对上述不同电性的染料均表现出良好的吸附效率。此外，不同ST-ATP对于CV和MO的吸附均符合Langmuir等温吸附模型和假二级动力学模型，表明其吸附行为是单分子层化学吸附过程。更多还原

【Abstract】 A series of starch-attapulgite composites(ST-ATP) with various weight feeding ratio of starch and attapulgite, approximately 3:1～1:10, were prepared by sol-gel method using epoxy chloropropane as cross-linking agent, which were applied as efficient adsorbents for the removal of dyes from water, methyl orange(MO) and crystal violet(CV) were tried as anionic and cationic dye representative here. The results indicated that the ST-ATPs with the weight feeding ratios of starch and attapulgite of 1:8 and 1:4 respectively, have optimal adsorption performance to CV and MO, with 218 mg/g and 144 mg/g respectively. This is because although starch itself has no adsorption effect to the aforementioned two dyes,attapulgite has good dispersion in the starch matrix, and the synergistic effect of these two components results in an improved adsorption efficiency of the composite. Moreover, the adsorption isotherms and kinetics of ST-ATP to the two dyes were well-described by Langmuir model and pseudo-second model respectively, indicating that ST-ATP for CV and MO adsorption both followed a homogeneous monolayer chemisorption process.更多还原