Paidar Martin, Bouzek Karel, Jelínek Ludek, Matejka Zdenek
Department of Inorganic Technology, Institute of Chemical Technology, Prague, Czech Republic.
Water Environ Res. 2004 Nov-Dec;76(7):2691-8.
The process of electrochemical treatment of a solution after strong basic anion exchanger regeneration was studied. The goal of the study was to reduce the nitrate content in the solution to allow its use in a closed loop. Diaphragmless, flow-through cells in a recirculation mode with and without a fluidizing bed of inert particles in the interelectrode space equipped with copper (Cu) cathodes and activated titanium anodes were used. The temperature was maintained at 20 degrees C. To assess the influence of recirculation of the regenerant solution on the quality of the treated water, the effect of the addition of copper ions to the solution, postelectrolysis cathode treatment, and enhanced mass transfer on the electrolysis results with respect to current efficiency and residual nitrate and nitrite concentration were investigated using an artificial solution. On the basis of the experimental results, a laboratory-scale unit for selective nitrate removal was designed and constructed that integrated ion exchange and electrochemical cell to one assembly. The process of recirculation of regenerant solution was tested using groundwater.
研究了强碱性阴离子交换剂再生后溶液的电化学处理过程。该研究的目的是降低溶液中的硝酸盐含量，以便其能在闭环系统中使用。使用了无隔膜的流通式电解槽，采用循环模式，电极间空间有或没有惰性颗粒流化床，配备铜（Cu）阴极和活性钛阳极。温度保持在20摄氏度。为了评估再生剂溶液循环对处理后水质的影响，使用人工溶液研究了向溶液中添加铜离子、电解后阴极处理以及强化传质对电解结果（电流效率、残余硝酸盐和亚硝酸盐浓度）的影响。基于实验结果，设计并构建了一个实验室规模的用于选择性去除硝酸盐的装置，该装置将离子交换和电化学槽集成到一个组件中。使用地下水测试了再生剂溶液的循环过程。
