中国计量大学学报2024，Vol.35Issue(1)：177-184,8.DOI:10.3969/j.issn.2096-2835.2024.01.022
基于硝酸钠联合焙烧改性天然沸石的水体氨氮动态吸附特性研究
Study on ammonia nitrogen dynamic adsorption characteristics of natural zeolites modified by sodium nitrate combined with calcination
摘要
Abstract
Aims:A kind of adsorbent with high ammonia nitrogen adsorption performance was developed by using sodium nitrate impregnation combined with roasting to modify natural zeolites(NZ).The dynamic adsorption characteristics and penetration curve of modified NZ for ammonia nitrogen in water were studied,and the dynamic adsorption capacity of NZ was compared with that of NZ.Methods:The removal efficiency and penetration curve of ammonia nitrogen under different initial mass concentration,influence flow and column depth conditions were investigated;and the Thomas model,Yoon-Nelson model and BDST model were applied to simulate the adsorption process.Results:When the initial ammonia nitrogen mass concentration was 5 mg·L-1,the column depth was 8 cm.The influent flow was 20 mL·min-1;and the adsorption capacity of ammonia nitrogen reached 6.81 mg·g-1,which was much higher than the 2.18 mg·g-1 of NZ.Conclusions:Sodium nitrate combined roasting modified zeolites can improve the adsorption capacity of ammonia nitrogen;and the results of dynamic flow experiment provide favorable guidance for the practical application of modified zeolites.关键词
动态吸附/改性沸石/穿透曲线/模型拟合Key words
dynamic adsorption/modified zeolite/penetration curve/model simulation分类
环境科学引用本文复制引用
刘文香,李祎,沈毅凡,黄雪霓,付海陆..基于硝酸钠联合焙烧改性天然沸石的水体氨氮动态吸附特性研究[J].中国计量大学学报,2024,35(1):177-184,8.基金项目
国家重点研发计划项目(No.2019YFC0408400). （No.2019YFC0408400）
