摘要
用江苏丹徒天然斜发沸石进行模拟氨氮废水的脱氮实验研究。结果表明,在氨氮溶液初始浓度为300mg/L、pH值为2.5～8.5时,天然斜发沸石对氨氮的吸附量较高,吸附等温线符合Freundlich方程,相关系数都在0.99以上,吸附动力学符合准二级吸附动力学模型,并以化学吸附为主;应用于畜禽废水处理中,氨氮去除率达85.6%。
The adsorption of ammonia nitrogen in waste water by natural clinoptilolite, collected from Dantu, Jiangsu province, was discussed in this research, Results show that the maximum adsorption capacity is observed at pH 2.5-8.5 when the initial concentration of ammonia nitrogen is 300 mg/L. The ammonia nitrogen adsorption data by clinoptilolite are well fitted by Freundlich isotherm with the correlation coefficients over 0.99. The ammonia nitrogen adsorption dynamics can be best described by the pseudo second-order model and chemical adsorption predominated its adsorption process. Natural clinoptilolite can remove ammonia nitrogen from demostic farming waste water with efficiency of 85.6%.
出处
《非金属矿》
CAS
CSCD
北大核心
2007年第6期60-62,共3页
Non-Metallic Mines
基金
江苏省科技攻关项目(BE2006371)
关键词
天然沸石
氨氮
废水
吸附
natural clinoptilolite ammonia nitrogen waste water adsorption
