粉煤灰沸石颗粒滤柱去除氮和磷的动态运行

The Removal of Nitrogen and Phosphate from Waste Water by Granule Pillar of Zeolite Synthesized with

摘要: 利用粉煤灰合成沸石,研究了其在去除污水中氨氮和磷酸盐方面的应用.结果表明,合成沸石对废水中的氨氮和磷酸盐具有显著的脱除效果.对氨氮和磷酸盐的吸附净化均随时间增加而变化,但均在24h后基本达到平衡.随合成沸石投加量的增加,去除污水中氮、磷的效果越好,但在投加量为8g.L-1以上时去除率的增加明显放慢.合成沸石在pH为7～9时氨氮去除率最高,为60%以上,磷的去除相反,在pH为7～9时去除率最低,为85%左右.合成沸石对氨氮的吸附为放热反应,温度越高,氨氮去除率下降越明显;对磷的吸附为吸热反应,温度升高对合成沸石除磷有利.

Abstract: The removal of nitrogen and phosphate from waste water by synthesized zeolite with coal fly ash was investigated in this paper.The results indicated that the synthesized zeolite could effectively eliminate nitrogen and phosphate from wastewater.The amount of nitrogen and phosphate removed by synthesized zeolite of fly ash changed along with time,and a constant value of absorption was reached after the adsorption time of 24 h.The effects of removal of nitrogen and phosphate also increased with the increase o...