为满足地下水深度脱氮处理的需求，以弄清地下水中硝态氮还原去除过程多介质多界面生物无机化学控制原理为根本，利用Fe(II)Fe(III)化合物和有机微污染物的脱氮作用，及微生物介导下的Fe(II)/Fe(III)循环，设计“Fe(II)Fe(III)-N-C-微生物”反应体系，通过对Fe(II)/Fe(III)化合物组分结构的设计调控、硝态氮还原和有机微污染物降解过程的Eh调控等手段，系统研究地下水硝态氮在Fe(II)/Fe(III)化合物-微生物界面的生物无机化学行为、还原转化规律、中间/最终产物、反应动力学及其还原转化过程的作用机制，实现Fe(II)/Fe(III)循环转化及硝态氮向气态氮转化的调控目标，研究成果有望为地下水中硝态氮的去除提供理论指导。

Based on the needs of deep denitrification treatment for groundwater, the course of development and perfection of denitrification is task worthy to research. The nitrate-reducing is urgently needed to be solved. It is a strategic subject to break through the bottleneck on the nitrate removal in groundwater. According to the principle of local electrochemistry, this proposal for the first time conceives the controllable reduction of nitrate in groundwater by novel Fe(II)/Fe(III)-LDH with the multi-media and multi-interface process. For this purpose, the following work should be carried out that includes the study on the tunable structure of Fe(II)/Fe(III)-LDH which containing other ion, the investigation on the redox potential according to temperature, acidity and concentration of the system, and dynamics from the nitrate-reducing and organic micro-pollutants degradation process. We attempt to obtain the mechanism of the local electrochemical process in multi-media and on multi-interface for the nitrate-reducing in groundwater by Fe(II)/Fe(III)-LDH. Moreover, the controlling object of the transformation from nitrate to gaseous nitrogen can be rapid realized effectively through the controlling methods including mastering the evolution rule of reduction, and exterminating of the intermediate and final products of the process, and proving the dynamics and micro-mechanism of nitrate-reducing and organic micro-pollutants degradation process. The Fe(II)/Fe(III) circular transform can be achieved at the same time. The research results of this proposal are scientifically valuable and practically directive to the nitrate-reducing in groundwater treatment.