盐改性方法对沸石吸附氨氮性能的影响  

Effect of Salt Modification Method on Performance of Ammonia Nitrogen Adsorption by Zeolite

作　　者：周传庭 安莹 羌佳鑫 王聪 覃阳洁 周振 ZHOU Chuanting;AN Ying;QIANG Jiaxin;WANG Cong;QIN Yangjie;ZHOU Zhen(Shanghai Urban Construction Design and Research InstituteCo.,Ltd.,Shanghai 200125,China;College of Environmental and Chemical Engineering,Shanghai University of Electric Power,Shanghai 201306,China;Sinopec Shanghai Petrochemical Co.,Ltd.,Shanghai 201500,China)

机构地区：[1]上海市城市建设设计研究总院<集团>有限公司,上海200125 [2]上海电力大学环境与化学工程学院,上海201306 [3]中国石化上海石油化工股份有限公司,上海201500

出　　处：《净水技术》2024年第9期80-86,共7页Water Purification Technology

基　　金：2022年度“科技创新行动计划”科技支撑碳达峰碳中和专项(22dz1209206)。

摘　　要：采用不同种类盐对天然沸石进行改性,通过吸附动力学和吸附热力学特性对比,探讨了盐改性方法对沸石吸附生活污水中氨氮性能的影响。结果表明,NaCl、CH3COONa、KCl、MgCl2和CaCl2改性沸石分别在改性液浓度为0.2、0.6、0.4、0.2 mol/L和0.1 mol/L时达到最佳氨氮去除率,分别为95.9%、82.1%、75.4%、74.9%和78.4%,最高达天然沸石的1.3倍,改性成本仅为0.052元/t。天然沸石和盐改性沸石对的吸附可以用准二级动力学描述,适用Freundlich吸附等温模型,低温有利于反应的发生。盐改性增大了沸石的吸附速率、表面均质性和最大离子交换容量。Different types of salts were used to modify natural zeolites,and the performance of zeolites after modification was compared for the adsorption of ammonia nitrogen of domestic wastewater according to the comparison of adsorption kinetics and thermodynamics.The results showed that the best ammonia nitrogen removal effect was achieved at the concentration of 0.2,0.6,0.4,0.2 mol/L,and 0.1 mol/L of the modified solution for NaCl,CH3COONa,KCl,MgCl2,and CaCl2 modified zeolites,corresponding to removal efficiencies of 95.9%,82.1%,75.4%,74.9%,and 78.4%,respectively.The cost to achieve the best salt modification effect(1.3 times the efficiency of natural zeolite)was only 0.052 yuan/t.The adsorption of ammonia nitrogen by natural or salt modified zeolites is consistent with the pseudo-second-order model and Freundlich adsorption isotherm model,and low temperature is favorable for the reaction.The adsorption rate,the homogeneity nature of the surface and maximum ion exchange capacity of zeolite are increased by salt modification.

关 键 词：沸石 盐改性 氨氮 吸附 生活污水 

分 类 号：X703[环境科学与工程—环境工程]