等离子体诱导修饰沸石复合材料对重金属离子的高效吸附及其机理研究

发展一种对重金属离子高效吸附、环境友好、经济廉价且易分离的吸附材料对环境保护和人类健康具有重要的意义。本项目利用高效、环境友好的低温等离子体技术在沸石/磁性铁氧化物表面可控接枝环糊精，制备一种具有高吸附及磁分离性能的沸石/磁性铁氧化物/环糊精复合材料。通过静态吸附法，研究不同实验条件下该磁性复合材料对重金属离子的吸附性能。进一步采用动力学和热力学吸附模型与微观表征（如XPS，EXAFS等）相结合的方法，从分子水平上揭示该磁性复合材料对重金属离子的吸附机理。本项目预期研究成果为重金属离子的有效去除提供一种新材料、新技术和新方法，为重金属污染治理提供科学的理论依据和技术支持。

The investment of an adsorbent with highly sorption efficiency of heavy metal ions, environment conscious, low cost and easily separated from solution is of great importance to environmental protection and human health. In this project, low temperature plasma-induced grafting technique, as an environmental friendly and pollution-free material surface functionalization method, is applied in the surface grafting of cyclodextrin on zeolite/Iron oxide material, to produce a highly sorption efficient and magnetic separation Zeolite/Iron oxide/Cyclodextrin composite material.Heavy metal ions sorption properties of the magnetic composite material under different conditions were investigated through static adsorption method. The magnetic composite material sorption mechanisms of heavy metal ions on molecular level were studied by microscopic characterization (such as XPS, EXAFS) technique combined with the adsorption kinetics and thermodynamics model. The expected investigation results will provide a new kind of material, method and technique for the sorption of heavy metal ions, and provide a scientific theoretical support for the controlling of heavy metal contamination.