中孔炭电极在电吸附除盐中的应用研究

摘要

In this research,activated carbon electrodes were prepared with mesoporous carbon,and adhesive and conductive materials were applied to remove salt.The effect of the adsorption time,voltage,flow rate and the solution initial concentra-tion on the removal of salt by electro-adsorption was studied.Plant discharged water was treated in order to change it into boiler recycling water through electro-adsorption under optimum conditions.The results demonstrated that the salt removal rate increased with the increase of adsorption time.The adsorption efficiency was enhanced with the increase of voltage,but side reaction like electrolysis occurred under excessive voltage.Desalination efficiency increased with the reduce of elec-trode spacing.The higher the initial concentration of NaCl solution,the greater the adsorption capacity,but the desalination efficiency was reduced,so each device should correspond to one optimal range.In this study,the optimal parameters of the experimental device were determined:the adsorption time should be 40,min,the voltage 1.2,V,and the electrode gap 1,mm.Under the optimum conditions,the treated plant discharged water can meet the using standards for boiler recycling water.%用中孔炭、黏合剂和导电材料制备的活性炭电极进行除盐研究，确定电吸附时间、电压、流量、溶液初始质量浓度等对电吸附除盐效果的影响，并在最佳工艺参数下处理电厂排放水作为锅炉补给水回用．结果表明：随着吸附时间的增加除盐率也增加，针对本实验装置确定吸附平衡时间为40,min；电压越高电吸附效果越好，但电压过高水会发生电解等副反应，电压1.2,V 为最佳；电极间距越小，除盐率越高，本研究选择1,mm；NaCl 溶液初始质量浓度越大吸附容量越大，但除盐率会降低，因此每种装置都对应一个最佳范围．在上述最佳工艺条件下，利用该电极对电厂的达标排放水深度处理，除盐效果明显，可以使其达到再生水用于锅炉补给水标准．