Formation of zero-valent iron nanoparticles mediated by amino acids

摘要：

　　Zero-valent iron nanoparticles (NZVI) which are frequently investigated for their application potential in pollutants removal can be prepared by several different ways.Here,we report NZVI formation by wet chemical synthesis in the presence of selected L-amino acids,thus low-molecular weight and biocompatible species.According to our results based mainly,but not only,on M(o)ssbauer spectroscopy (an excellent iron sensitive method),there are distinct differences in zero-valent iron content when each of the amino acids under study mediated NZVI formation.The content of iron atoms in the oxidation state of zero is one of crucial parameters when considering the reductive mode of NZVI action against pollutants.For instance,while the presence of L-glutamic acid promoted NZVI generation,L-cysteine hindered it completely.The effect of L-arginine and L-glutamine presence during NZVI formation was also investigated and evaluated.Moreover,the influence of acidic and alkaline pH values on NZVI formation in the presence of all four selected L-amino acids was looked into.It turned out that acidic and alkaline pH values have negative effects on NZVI formation in the presence of L-glutamic acid and L-glutamine.On the contrary,almost no effect of pH was observed for L-cysteine and L-arginine.

关键词： zerovalent iron nanoparticle synthesis Moessbaaer spectroscopy ZVI L-amino acids

作者: Karolina Machalova Siskova Jana Straska Michal Krizek Jiri Tucek Libor Machala Radek Zboril

作者单位: Regional Centre of Advanced Technologies and Materials, Dept.of Physical Chemistry, Faculty of Scien Regional Centre of Advanced Technologies and Materials, Dept.of Experimental Physics, RCPTM, Faculty

会议类型: 国际会议

会议名称: 2013 International Symposium on Environmental Science and Technology(2013环境科学与技术国际会议)

会议地点: 大连

会议语种:英文

页码: 649-655

在线出版日期: 2013-06-04（万方平台首次上网日期，不代表论文的发表时间）