摘要
纳米零价铁(nZVI)尺寸小、比表面积大、表面能高、还原性强,对环境污染物具有良好的去除效果,常用于土壤及水体修复领域.而nZVI的上述特性使其在含氧环境介质中易发生氧化现象,导致物理化学性质发生变化并影响污染物的去除.本文综述了nZVI在不同环境介质中氧化后物理化学性质演变研究进展,包括nZVI制备方法及特性综述、nZVI氧化导致的结构组成和性质的演变、氧化后对重金属去除机理探讨和对环境的毒性变化,并对nZVI氧化研究与其环境领域中的应用关系进行了展望,期待为深入研究提供理论借鉴.
Nanoscale zero-valent iron has great potential in environmental contaminants degradation due to its small size, large surface area, high surface energy and high reduction potential. And it is widely used in soil and water remediation. These properties make nanoscale zero-valent iron oxidized readily when exposed to oxygen medi leading to transformation of its physical, and chemical properties, and significant decrease in reactivity. In this paper, the advance on the transformation of nanoscale zero-valent iron in different environment medi is reviewed, including sysnthesis and characteristics of nanoseale zero-valent iron, the transformation of structure, compositions, reactivity, toxicity, mechanism of heavy metal removal and perspectives of oxidation nanoscale zero- valent iron.
出处
《环境化学》
CAS
CSCD
北大核心
2014年第4期576-583,共8页
Environmental Chemistry
基金
国家自然科学基金项目(21003151)
上海市基础重点研究项目(11JC1412600)
中央高校基本业务费项目(0400219212)资助
关键词
纳米零价铁
氧化
性质演变
环境介质
nanoseale zero-valent iron, oxidation, properties transformation, environment medi.
