气溶胶法炭负载纳米零价铁吸附与化学还原性能研究  

ADSORPTION AND CHEMICAL REDUCTION PERFORMANCE OF CARBON-SUPPORTED NANO-ZERO VALENT IRON PREPARED BY AEROSOL METHOD

作　　者：郑玥石 占敬敬 Zheng Yueshi;Zhan Jingjing(School of Ocean Science and Technology,Dalian University of Technology,Panjin,Liaoning 124221)

机构地区：[1]大连理工大学海洋科学与技术学院,辽宁盘锦124221

出　　处：《石油炼制与化工》2022年第12期59-64,共6页Petroleum Processing and Petrochemicals

基　　金：国家自然科学基金资助项目(21876022);国家重点研发计划项目(2019YFC1803803)。

摘　　要：纳米零价铁(nZVI)作为一种新型环境友好材料,因其本身不稳定、易团聚等性质而在环境污染治理等领域的应用受到限制。本研究采用气溶胶法以炭作为载体,通过支撑与负载作用制备了炭负载纳米零价铁(Fe^(0)C)复合材料,并对其进行了系列表征,研究了其对有机物吸附和对硝酸盐的还原效果。结果表明:在Fe^(0)C中,Fe^(0)呈纳米颗粒状均匀镶嵌在球状炭球内外表面,直径范围为80~120 nm;相比nZVI,Fe^(0)C具有较高的比表面积;Fe^(0)C对罗丹明B的最大吸附量为853.7 mg/g,对硝酸盐的2 h去除率为50.6%,产物中54.7%为N_(2),表明复合材料具有良好还原性能与实际应用价值。Nano zero-valent iron(nZVI),as a new type of environmentally friendly material,is limited in the field of environmental pollution control due to its inherent instability and easy agglomeration.In this study,nano-zero-valent iron carbon(Fe^(0)C)composites were prepared by using aerosol carbon as a carrier,and their effects on organic matter adsorption and nitrate reduction were studied.SEM results show that Fe^(0) is uniformly embedded in the inner and outer surfaces of spherical carbon in the form of nanoparticles,with a diameter ranging from 80 to 120 nm.Combined with BET and other characterization results,it is shown that Fe^(0)C composite has a high specific surface area.The results of adsorption and chemical reduction experiments showed that the maximum adsorption capacity of Rhodamine B was 853.7 mg g,the removal rate of nitrate for 2 h was 50.6%,and 54.7% of the product was nitrogen,which proved the good reduction performance and practical application value of the composite material.

关 键 词：气溶胶法 纳米零价铁 炭载体 吸附 还原 

分 类 号：X703[环境科学与工程—环境工程]