摘要
用浸渍焙烧法制备稀土吸附剂，用于静态脱氮实验。结果表明，氧化铈改性的稀土吸附剂吸附性能优于氧化镧和氧化镧．氧化铈复合改性的稀土吸附剂；当吸附剂用量为2r／L，进水pH为4—6，吸附时间为2．5h，氧化铈改性稀土吸附剂对模拟废水氨氮浓度为20mg／L的吸附率达到80．23％；吸附剂再生6次后氨氮的去除率下降不到7％，说明吸附剂具有较好的稳定性。
The new-style Ce-modified zeolite adsorbent was prepared by modifying zeolite with cerium. The results showed that the adsorption capacity of Ce-modified for ammonia nitrogen was better than the Lamodified and La-Ce compound modified zeolite. The adsorption rate of the ammonia nitrogen removal can reach 80.23% under the following conditions：the dosage of adsorbent is 2 g/L,the pH value of the solution is from 4 to 6 and the adsorption time is over 2.5 h, adsorption capacity of ammonia nitrogen decreases less than 7% after the absorbent regenerated 6 times, which meant a good stability of Ce-modified zeolite adsorbent.
出处
《应用化工》
CAS
CSCD
2009年第8期1115-1117,共3页
Applied Chemical Industry
基金
云南省自然科学基金资助项目(2000B0023M)
关键词
稀土
氧化铈
吸附剂
脱氮
rare earth
cerium oxide
absorbent
ammonia nitrogen removal
