Optimized iron-biochar composites for degrading halogenated compounds in environmental media: synthesis strategies and reaction mechanisms

用于降解环境介质中卤代化合物的优化铁-生物炭复合材料：合成策略和反应机制

• 批准号: 392011053
• 负责人: Dr. Anett Georgi
• 金额: --
• 依托单位: Helmholtz-Zentrum für Umweltforschung (UFZ)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/392011053?language=en
• 关键词: Optimized; iron; biochar; composites; degrading

The rapid urbanization and industrialization in the past decades have resulted in severe environmental pollution associated with halogenated organic compounds (HOCs) in both China and Europe. The objective of the proposed project is to gain new insights and deepened understanding of the processes involved in green nFe0/Pd/C composite synthesis and reactions of the prepared materials for the remediation of HOCs in groundwater. This includes the identification of synthesis options of particles with tailored and improved properties using hydrothermal carbonization (HTC) method. Thorough mechanistic understanding of the involved processes sorption, reaction, transport of reactive species and catalysis including their synergies will contribute to targeted particle optimization and explore potential application areas. The suggested nFe0/Pd/C composites shall be specifically suitable for in-situ groundwater remediation and provide improved properties for treatment cases where existing environmental science nano-remediation fails. The synergistic combination of various modes of actions of its components for multi-catalysis or sequential treatment of contaminants will be achieved. Firstly, various options for incorporating metals into or onto the carbon particles will be studied, and full physico-chemical characterization and reactivity testing will be performed. Secondly, reactions are studied in batch systems for deeper mechanistic understanding including the interplay of Pd, carbon surface and Fe-species, reaction pathways and reactive species involved. Furthermore, options for multicatalysis and combined simultaneous or sequential reduction/oxidation processes are explored. Finally, the materials and processes developed are tested in the lab employing water from contaminated sites both in Germany and China. The cooperative research between China and Germany will significantly enhance the level of groundwater remediation research for industrially contaminated sites, with specific emphasis on China.

在过去的几十年里，中国和欧洲的快速城市化和工业化导致了严重的环境污染，与卤代有机化合物（HOCs）有关。该项目的目标是获得新的见解和加深理解的过程中所涉及的绿色nFe 0/Pd/C复合材料的合成和反应的制备材料的修复地下水中的HOCs。这包括使用水热碳化（HTC）方法识别具有定制和改进的性质的颗粒的合成选项。对所涉及的吸附、反应、活性物质的传输和催化过程及其协同作用的深入机理理解将有助于有针对性的颗粒优化和探索潜在的应用领域。建议的nFe 0/Pd/C复合材料应特别适合于原位地下水修复，并为现有环境科学纳米修复失败的治疗案例提供改进的性能。将实现其组分的多种作用模式的协同组合，用于污染物的多催化或顺序处理。首先，将研究将金属引入碳颗粒或碳颗粒上的各种选择，并进行全面的物理化学表征和反应性测试。其次，在间歇系统中研究反应，以更深入地理解机理，包括Pd，碳表面和Fe物种的相互作用，反应途径和所涉及的反应物种。此外，多催化和组合的同时或顺序还原/氧化过程的选项进行了探讨。最后，在实验室中使用来自德国和中国污染场地的水对开发的材料和工艺进行测试。中国和德国的合作研究将显著提升工业污染场地地下水修复研究水平，特别是中国。