硫化纳米零价铁在环境污染物处理中的应用进展
Progress in the application of sulfidated nano zero-valent iron in the treatment of environmental pollutants
周建宇 1占敬敬 1朱自强 1杨春林1
作者信息
- 1. 大连理工大学 海洋科学与技术学院工业生态与环境工程重点实验室,辽宁 盘锦 124221
- 折叠
摘要
介绍了硫化纳米零价铁的制备方法、影响处理效果的因素、应用场景、毒性和回收利用过程.纳米零价铁(nZVI)作为新兴材料,具有很强的吸附性和还原性,广泛用于去除土壤、地下水等环境中的氯代烃、农药以及重金属.但其易钝化以及较差的电子选择性的特点一定程度上限制了其实际处理效果.近些年,学者们通过多种改性手段改变nZVI的性质.其中,硫化改性合成的硫化纳米零价铁(S-nZVI)还原性、电子选择性和稳定性更强,由于其独特的结构特征,S-nZVI在水环境和土壤环境的治理修复中具有广阔的应用前景,而进一步明确活性位点的催化机制是确定S-nZVI结构与活性关系的关键.
Abstract
Describing the preparation of sulfidated nano zero-valent iron,factors affecting treatment effec-tiveness,application scenarios,toxicity and recycling processes.As an emerging material with strong ad-sorption and reduction properties,nano zero-valent iron(nZVI)is widely used for the removal of chlorina-ted hydrocarbons,pesticides,and heavy metals from soil,groundwater,and other environments.However,its easy passivation and poor electronelectivity limit its practical treatment effect to a certain extent.In re-cent years,scholars have changed the properties of nZVI by various modification means.Among them,the synthesized sulfidated nano-zero-valent iron(S-nZVI)has stronger reducibility,electron selectivity and sta-bility,S-nZVI has unique structural features,which makes it has a broad application prospect in the treat-ment and remediation of water and soil environments,and further clarification of the catalytic mechanism of the active site is the key to determine the structure-activity relationship of S-nZVI.
关键词
硫化纳米零价铁/结构分析/影响因素/潜在风险Key words
sulfidated nanoscale zero-valent iron/structural analysis/influence factors/potential risks引用本文复制引用
基金项目
国家自然科学基金面上项目(21876022)
出版年
2024
NETL
NSTL
万方数据