三维电极电解法去除水中硝酸盐氮

发布时间：2018-04-16 02:01

本文选题：电化学 + 粒子电极　；参考：《净水技术》2017年01期

【摘要】：催化脱氮、反渗透、电渗析、离子交换等传统处理技术在去除地下水中的硝酸盐氮时存在成本高、处理效果不佳且造成二次污染等问题。对此,选用能深度去除水体中硝酸盐的电化学净水工艺,在传统二维电极体系中填充泡沫金属/颗粒活性炭双填料以构建新型三维电极反应器,探究其去除水中硝酸盐氮的效果,并进一步考察反应的影响因素。试验结果表明,100 mg N/L的硝酸盐氮在303 min的水力停留时间下经2.0 A电流电解,最终去除率可达到91%,总氮去除率为67%,氨氮的转化率仅为23%。单因素试验发现,延长水力停留时间、增大电流强度和加大填充量均可促进硝酸盐氮的降解,提高去除速率;增加氯离子投加量,可提高总氮去除率,改善二次污染问题。
[Abstract]:The traditional treatment techniques such as catalytic denitrification reverse osmosis electrodialysis ion exchange and so on have some problems such as high cost low efficiency and secondary pollution in removing nitrate nitrogen from groundwater.In order to construct a new three dimensional electrode reactor, the electrochemical water purification process, which can remove nitrate in water deeply, is selected, and the foamed metal / granular activated carbon double fillers are filled in the traditional two dimensional electrode system.The effect of nitrate nitrogen removal in water was investigated, and the influencing factors of the reaction were further investigated.The results showed that the nitrate-N of 100mg N / L was electrolyzed by 2. 0 A current at the HRT of 303 min. The final removal rate was 91%, the removal rate of total nitrogen was 67%, and the conversion rate of ammonia nitrogen was only 23 3%.The results of single factor experiment show that increasing HRT, increasing current intensity and filling amount can promote the degradation of nitrate nitrogen and increase the removal rate of nitrate nitrogen, and increase the amount of chloride ion can improve the removal rate of total nitrogen and the problem of secondary pollution.
【作者单位】：上海理工大学环境与建筑学院;河北省环境监测中心站;
【基金】：国家自然科学基金(51208299) 上海理工大学校内科技发展项目(16KJFZ060)
【分类号】：X523

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