学校首页  |  加入收藏

2015年王弋博老师国家自然基金项目《纳米零价铁与铁还原军耦合强化修复铬污染土壤的机理研究》简介

发布日期:2015年09月06日 15:29      作者:      点击:[]

 

土壤重金属污染是一个全球性的环境问题,铬污染农田土壤的修复也成为土壤环境化学研究的热点,纳米零价铁处理技术是近年来国际上新兴的一种污染修复技术。本项目以源于甘肃典型污灌区湿地土壤的一株铁还原菌Shewanell sacchrophilaYL09为研究对象,利用批式实验系统研究了厌氧条件下NZVI+Shewanell sacchrophila YL09+CrVI)共存体中,NZVI和铁还原菌协同促进CrVI)还原为CrIII)的反应机理,探讨了二价铁和三价铁在反应体系中的作用,揭示NZVI一铁还原菌复合体系的CrVI)还原转化途径,阐明NZVI与铁还原菌共还原转化CrVI)的互作机制,探讨污灌区湿地土壤中FeIII)微生物还原过程与CrVI还原过程的耦合关系,阐明土壤复杂条件下NZVI促进CrVI)还原的微生物-化学耦合机制.为利用NZVI协同异化铁还原促进CrVI)污染土壤的生物治理提供科学依据。  

 

 Soil heavy metal pollution is one of the serious environment issues in the world. Bioremediation of Cr(VI) polluted farmland soil has become a research hotspot in thesoil environmental chemistry field. Nanoscal Zero Valent Iron (NZVI)  processing technology is a emerging contaminatedremediation technology. Based on Shewanell sacchrophila YL09, iron–reducing bacteria, isolated from the wetland in typical sewage irrigation areain Gansu Province, reaction mechanism of promoting hexavalentchrome reduction reaction byNZVI+ iron–reducingbacteriainanaerobic conditionswere studied, the roles of Fe2+ & Fe3+in reaction system were discussed, the transformation way of Cr(VI) in NZVI+ iron–reducing bacteria composite system wererevealed,coupling relationship between Fe(III)reduction and Cr(VI)were discussed, coupling mechanism betweenmicroorganism and chemistry in soil were expounded. The scientific basis of in situ repair strategies based on iron-respirationand NZVI were provided.    

 

上一条:我院成功申报2016年国家自然科学基金项目2项
下一条:国家自然基金项目

关闭