氧化铈改性沸石脱氮的研究 |
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引用本文: | 刘伟文,宁平,黄小凤,朱文杰,陈丽琼,谭娟,张元刚. 氧化铈改性沸石脱氮的研究[J]. 应用化工, 2009, 38(8): 1115-1117 |
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作者姓名: | 刘伟文 宁平 黄小凤 朱文杰 陈丽琼 谭娟 张元刚 |
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作者单位: | 昆明理工大学,环境科学与工程学院,云南,昆明,650093 |
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基金项目: | 云南省自然科学基金资助项目 |
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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2 g/L,进水pH为4~6,吸附时间为2.5 h,氧化铈改性稀土吸附剂对模拟废水氨氮浓度为20 mg/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。
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关 键 词: | 稀土 氧化铈 吸附剂 脱氮 |
Study on ammonia nitrogen removal from wastewater by model-Ce zeolite adsorbent |
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Abstract: | 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 La-modified 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. |
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Keywords: | rare earth cerium oxide absorbent ammonia nitrogen removal |
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