摘要
在中试规模条件下,考察了接触催化氧化过滤工艺同步去除地下水中氨氮、铁、锰的效果,研究了三者在去除过程中的交互作用。结果表明:该工艺对原水中的氨氮、铁、锰具有良好的去除效果;铁优先于锰和氨氮被去除,提高进水亚铁离子浓度会导致除氨氮滤层向下迁移,出水氨氮浓度不达标,而铁离子对去除锰离子不产生影响的界限浓度为2 mg/L;提高进水锰离子浓度可以显著促进对高浓度氨氮的去除,表明锰质滤膜对氨氮的去除可能起到了催化氧化的作用。
The simuhaneous removal of ammonia nitrogen, iron and manganese from groundwater by the contact catalytic oxidation process and their interaction were investigated in pilot scale. The results showed that excellent removal efficiency of ammonia nitrogen, iron and manganese from groundwater was obtained by the process. Iron removal was superior to that of manganese and ammonia nitrogen. The in- crease of iron concentration would lead to the down-shift of layer responsible for ammonia nitrogen remov- al, which resulted in the deterioration of effluent quality. To meet the water quality standard of manga- nese, the maximum concentration limit of iron was 2 mg/L. However, the removal efficiency of ammonia nitrogen was significantly enhanced by the increase of manganese concentration, indicating that manga- nese sand media could have a catalytic oxidation effect on ammonia nitrogen removal.
出处
《中国给水排水》
CAS
CSCD
北大核心
2014年第19期32-35,39,共5页
China Water & Wastewater
基金
国家自然科学基金资助项目(51278409
51308438)
关键词
地下水
氨氮
铁
锰
同步去除
groundwater
ammonia nitrogen
iron
manganese
simultaneous removal
