石墨烯改性纳米磁晶对有机污染物及致病微生物协同修复和机制研究

Until now, there is no compound pollution model and synergetic remediation method about typical harmful organic pollutants and pathogenic microorganisms from water due to their low concentrations, whose research progress is very low. In this proposal, graphene modified magnetic nanocrystals will be prepared through green chemistry method; simulated water combined organic pollutants and pathogenic microorganisms will be obtained, through studying the roles of valence bond changes and electron transfers on coupled surface of graphene modified magnetic nanocrystals, an efficient model adsorbent will be obtained; to build a synergetic performance evaluation system on both organic pollutants and pathogenic microorganisms, and study how the structure, component of graphene modified magnetic nanocrystals affect synergetic remediation performance, to establish adsorption desorption principle by investigating the effect of several environmental conditions on removing compound contaminants, such as water quality, concentration, temperature, ionic strength, pH value, and so on; to establish molecular dynamics model and clarify its mechanism while removing synergistically organic pollutants and pathogenic microorganisms using grapheme modified magnetic nanocrystals as adsorbents. After the research project being finished, it is beneficial to water safety, control and synergetic remediation of compound pollutions, which is favor of the foundation for new theory.

水中有机污染物及致病微生物含量较低，危害非常巨大，复合污染有效模型及协同修复方法尚是空白，相关研究进展缓慢。本研究拟利用绿色合成手段制备石墨烯改性纳米磁晶；模拟水体复合污染条件，通过调控石墨烯与纳米磁晶耦合界面的价键变化和电子迁移转化规律，筛选出稳定、高效的石墨烯改性纳米磁晶吸附剂；构建复合污染条件下有机污染物及致病微生物协同修复效能的评价体系，考察石墨烯改性纳米磁晶结构、组成与有机污染物及致病微生物协同修复的关系；揭示水质、浓度、温度、离子强度和pH值等环境因素对石墨烯改性纳米磁晶协同修复有机污染物及致病微生物的影响规律，探知其协同吸附/脱附作用原理；建立有机污染物及致病微生物在石墨烯改性纳米磁晶表面协同富集的分子动力学模型，阐明石墨烯改性纳米磁晶微观结构对有机污染物及致病微生物协同修复效率作用机制。本项目的研究成果将为水体安全、水体复合污染的诊断、控制与修复等奠定理论基础。

本研究利用绿色合成手段制备石墨烯改性纳米磁晶，模拟水体复合污染条件，通过调控石墨烯与纳米磁晶耦合界面的价键变化和电子迁移转化规律，筛选出了稳定、高效的石墨烯改性纳米磁晶吸附剂，构建了复合污染条件下有机污染物及致病微生物协同修复效能的评价体系，考察了石墨烯改性纳米磁晶结构、组成与有机污染物及致病微生物协同修复的关系，揭示了水质、浓度、温度、离子强度和pH 值等环境因素对石墨烯改性纳米磁晶协同修复有机污染物及致病微生物的影响规律，探知了其协同吸附/脱附作用原理，建立了有机污染物及致病微生物在石墨烯改性纳米磁晶表面协同富集的分子动力学模型，阐明了石墨烯改性纳米磁晶微观结构对有机污染物及致病微生物协同修效率作用机制。本项目的研究成果将为水体安全、水体复合污染的诊断、控制与修复等奠定理论基础。.重点探索了水体中典型致病微生物E.coil的杀灭和抗性基因的吸附脱除及其机理。通过制备Fe3O4改性石墨烯纳米复合材料、磁性Ag-CoFe2O4-GO、超薄Fe3O4-TiO2纳米片、Ag/g-C3N4可见光光催化剂、TiO2-BiWO6复合双纳米片、Ag2WO4修饰的介孔g-C3N4、氧化石墨烯纳米片这些材料杀灭E.coil和吸附抗性基因。.重点探索了水体中抗生素等污染物的脱除及其机理。通过CexZr1-xO2/RGO 复合材料电极研究对环丙沙星（CIP）高效的矿化效率，在电芬顿系统中采用三维CeO2/RGO复合材料作为阴极协同降解水中的抗菌药物环丙沙星，在电芬顿系统中用CexA1-xO2复合材料改性碳毡阴极降解环丙沙星。.重点探索了大气中典型污染物氮氧化物的脱除及其机理。制备介孔MnCo2O4 及研究低温SCR脱硝活性，探究不同形貌的MnCo2O4催化剂对脱硝性能的影响，探究介孔MnO2在低温下选择催化还原技术中的应用，探究三维立体有序介孔CexZr1-XO2在NH3-SCR应用，探究Mn2O3负载Fe2O3六方微米片在低温NH3-SCR应用，探究MnFeOx纳米棒在低温以NH3选择性催化还原NOx，介孔材料WO3(χ)-CeO2的制备及NH3-SCR脱硝性能。.重点探索了光催化分解水产氢同时脱除水体中典型有机污染物。探究高效光催化水分解复合物催化剂rGO/Pt-TiO2还原氧化石墨烯的基本作用。

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