载铁氮掺杂有序介孔碳对土壤中氯霉素迁移代谢影响的化学机制

针对环境抗生素污染因持续输入且抗生物降解而污染日趋严重、危害日益增大，纳米零价铁难以直接应用的问题，本项目选择氯霉素为目标污染物，围绕获取兼具高效还原脱氯和吸附稳定的复合作用材料，并阐明其对氯霉素的降解这一科学问题，系统研究： 1）合成、表征载铁氮掺杂有序介孔碳，研究其还原脱氯和吸附的机制；2）利用土柱结合新型超重力床淋溶试验，研究载铁氮掺杂有序介孔碳对土壤氯霉素迁移转化行为的影响，结合数学模型，明晰影响规律；3）利用现代仪器表征和同位素示踪等识别目标污染物浓度及代谢产物变化，揭示氯霉素在土壤中的代谢过程变化及其机制；4）采用蒸渗仪和Monod模型，探明野外试验中新材料对氯霉素的实际影响。本项目预期结果将获得新型功能材料并探明氯霉素“还原脱氯-材料吸附”污染防控新理论，为氯代抗生素污染控制提供理论支撑和材料选择。

Considering the antibiotic contamination can be continuous infusion and hardly degradable. As a consequence, we will take chloramphenicol as a research subject, mainly focusing on obtaining composite with high-efficiency dechlorination and adsorption stability and clarifying degradation behavior in this study. The main research contents are as follows: (1) Research of synthesis and characterization of mesoporous nitrogen-doped carbon materials supported nZVI. Study progress on mechanisms of reductive dichlorination and adsorption of this composite; (2) The migration characterization of chloramphenicol in soil will be investigated with soil column leaching experiment and hypergravity leaching experiment (3) Combining characterization and isotope analysis to clarify the effect that nitrogen-doped ordered mesoporous carbon materials supported nZVI on the degradation behavior of chloramphenicol; (4) Lysimeter and Monod model will be carried out to study the impact of composites usage patterns and conditions of recharging on the adsorption and degradation actions of the chloramphenicol in field study. Finally, this work can provide high efficiency composite materials for chloramphenicol-contaminated soil and illustrate theories. The findings of this project can provide a remediation material, remediation method and scientific basis for antibiotic contaminated soils.