摘要
采用共沉淀法在碱性条件下制得Fe3O4-粉煤灰复合材料,通过投加量、p H值、氨氮初始质量浓度、振荡时间等单因素实验,比较了不同条件下该复合材料对模拟氨氮废水的吸附性能差异,并结合吸附模型对其吸附机理进行初步探究。结果表明,室温条件下(25℃),氨氮初始质量浓度为20 mg/L、复合材料投加量为1 g/100m L、p H值为6、以150 r/min振荡30 min时,对氨氮吸附效果最佳。该复合材料对氨氮的等温吸附过程更符合Freundlich模型,等温吸附方程为lnqe=0.3271ln ce-0.2851,拟合度R2为0.96883。
Fe3O4-lfy ash composite material was prepared by the coprecipitation method in alkaline conditions. Adsorption performance of the material on simulation of ammonia wastewater was investigated through single factor experiment （including dosage, pH value, ammonia nitrogen concentration, oscillation time）. Preliminary study on adsorption mechanism also was investigated based on the model analysis. The results show that the optimum adsorption for NH3-N on the composite material was in the following condition： initial concentration of ammonia nitrogen is 20 mg/L, pH= 6, the time of oscillation is 30min. The isothermal adsorption process is more iftted to Freundlich model. The equation islnqe=0.3271lnce-0.2851, with the iftting degree forR2 is 0.96883.
出处
《非金属矿》
CAS
CSCD
北大核心
2015年第5期74-77,共4页
Non-Metallic Mines
基金
安徽省自然科学基金青年基金(1508085QD72)
安徽省教育厅自然科学研究重点项目(KJ2014A216)
合肥学院人才科研基金(14RC02)
国家大学生创新创业训练项目(201411059005)
关键词
粉煤灰
共沉淀
复合材料
氨氮
吸附
lfy ash
coprecipitation
composite material
ammonia nitrogen
adsorption
