Characteristics and kinetics of nitrobenzene reduction by sucrose-modified nanoiron
Characteristics and kinetics of nitrobenzene reduction by sucrose-modified nanoiron
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蔗糖修饰纳米铁还原硝基苯的特性及动力学
DOI：
10.1007/s40242-013-3041-7
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Zhao Yongsheng
中科院分区：
文献类型：
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作者：
Hui Li;Zhao Yongsheng
采用液相还原法制备了蔗糖修饰的纳米级零价铁（SM-NZVI），并通过透射电镜（TEM）和x射线衍射（XRD）对其形状和结构进行了表征。SM-NZVI颗粒的粒径约为100 ~ 150 nm，具有较好的分散性。进行了SM-NZVI对水中硝基苯（NB）的批量降解实验。结果表明，与vianzvi相比，通过ams - nzvi还原NB的效率提高了44.24%，并且共存的Ca2+、Mg2+、HCO3−等离子对NB的还原影响不大，但对苯胺（AN）的生成有负面影响。此外，动力学研究表明，SM-NZVI在不同初始pH值和铁投加量下的NB还原可以用准一级动力学模型来描述。铁的氧化产物主要是形状不规则的fe3o4和fe2o3。
Sucrose-modified nanoscale zero-valent iron(SM-NZVI) was prepared with liquid phase reducing method, and characterized by transmission electron microscopy(TEM) and X-ray diffraction(XRD) for the shape and structure. The size of SM-NZVI particles was about 100–150 nm and they displayed better dispersity. The degradation of nitrobenzene(NB) in water by SM-NZVI was carried out in batch experiments. The results indicate that the efficiency of NB reductionviaSM-NZVI increased by 44.24% compared with thatviaNZVI, and coexistent Ca2+, Mg2+, HCO3−and other ions showed little effect on NB reduction but negative influence on aniline(AN) production. Furthermore, the kinetic researches indicate that NB reduction with SM-NZVI could be described by pseudo first-order kinetic model at different initial pH values and iron dosage. The oxidation products of iron were mainly Fe3O4and Fe2O3with irregular shape.