斜发沸石去除氨氮及其再生的研究

摘要

In order to tackle the problem for remove ammonia from polluted water, clinoptilolite is used for adsorbing the ammonia from waster water, and chemical and biological regeneration for ammonia removal was investigated. The results showed that the data were fit to Langmuir isotherms for ammonium ion uptake onto clinoptilolite. For biochemical regeneration experiment, it was stable for the removal of NH3-N by clinoptilolite column with removal efficiency over 80% after two months biochemical regeneration using the NaHCO3 regenerant with Na+ concentration of 2 000 mg/L and air-water ratio 5∶1 at 15～26.5 ℃. The clinoptilolite zeolite was suggested as a suitable material for adsorbing ammonia.%为了有效去除污水中的氨氮,采用斜发沸石进行污水中氨氮的吸附去除研究,同时探讨了化学再生和生物再生的效果.结果表明,氨氮在沸石上吸附符合Langmuir吸附等温式;生物化学再生后沸石,经过2个月稳定运行,采用Na+质量浓度2 000 mg/L,气水比为5∶1,温度为15～26.5 ℃时,氨氮的去除效率可超过80%.沸石可以作为一种有效的氨氮吸附材料并且可有效再生.