【作者】 许冉冉； 张新颖； 李杰；

【Author】 Xu Ranran;Zhang Xinying;Li Jie;College of Environment and Resources,Fuzhou University;

【机构】 福州大学环境与资源学院；

【摘要】 天然沸石对NH₄⁺的等温吸附过程符合langmuir线性模型（R²=0.998 9）,吸附动力学符合假二级方程（R²>0.99）。天然沸石对NH₄⁺的吸附过程中,伴随着明显的阳离子交换,以Ca²⁺和Na⁺为主。阳离子交换比例表明沸石对氨氮的除去主要依靠阳离子的交换吸附完成,NH₄⁺与沸石晶格中的Ca²⁺、Na⁺等阳离子发生交换,水中氨氮被去除。天然沸石的最佳无机盐改性方法为NaCl溶液进行改性,最佳浓度为1 mol/L。盐改性属于离子交换改性法,金属阳离子的交换容量变化是影响氨氮吸附的主要原因。更多还原

【Abstract】 The ammonium adsorption by the natural clinoptilolite was fitted well with Langmuir adsorption isotherm（R²=0.998 9）and the pseudo second-order kinetics（R²>0.99）.The absorption of natural zeolite for NHJ was accompanied by ion exchange significantly,Na⁺ and Ca²⁺occupied the major part of the exchange amount in this process.Cation exchange capacity（CEC） showed the removal of NHJ mainly depended on ion exchange.NHJ was exchanged by cations such as Ca⁺,Na⁺ in the zeolite crystal lattice and was moved from the waste water at the same rime.The best method for natural zeolite is modified by 1 mol/L NaCl.Salt modification was ion-exchange modification method and metal cation exchange capacity change was the main reason for the ammonia nitrogen adsorption.更多还原