麦饭石吸附氨氮应用研究  

Research of Ammonia Adsorption With Maifan Stone

作　　者：符瞰[1,2] 夏启斌[2] 李忠[2] 钟同畅[1] 

机构地区：[1]海南省环境科学研究院,海口570206 [2]华南理工大学化学与化工学院,广州510640

出　　处：《工业安全与环保》2011年第4期3-5,共3页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金项目(20336020)

摘　　要：主要研究麦饭石应用于吸附氨氮。采用静态吸附法测定麦饭石的吸附离子交换等温线,考察其吸附氨氮的规律,讨论溶液pH值和高温焙烧麦饭石对其吸附氨氮的影响,提出应用不同的溶液浸泡改性天然麦饭石,从而强化其对氨氮的吸附。研究结果表明,麦饭石对氨氮吸附主要由它的活性位和可交换离子决定,其吸附规律可以采用Freundlich等温方程描述,不同温度焙烧活化对麦饭石吸附氨氮影响不大;麦饭石吸附氨氮的最佳pH值范围在3.2~9.4之间;NaCl溶液浸泡改性比KCl、NaOH溶液浸泡改性麦饭石更能提高其对氨氮的吸附能力,当氨氮质量浓度为150 mg/L时,对氨氮的吸附量可提高73.9%。The adsorption of ammonia with Maifan stones is investigated in the paper.Adsorption ion exchange isotherms of ammonia with the Maifan stones,as well as the laws of ammonia adsorption,are studied using static adsorption method.The effects of pH and the baked temperature on ammonia adsorption of the Maifan stones are further discussed.An novel method is proposed to improve the adsorption of ammonia that different aqueous solutins are used to soak the natural Maifan stones.The results indicate that ammonia adsorption with Maifan stone mainly depends on its active sites and exchangeable ions,the laws can be described using Freundlich adsorption isotherm equation and the different bake temperatures activation has little effect on ammonia adsorption and ion exchange capacities with Maifan stone;the op timized pH of solutions for the adsorption and ion exchange of ammonia with the Maifan stones is 3.2-9.4;compared to KCl solution soak modification can induce more ammonia adsorption capacity of Maifan stones;the adsorption amount of ammonia can be increased by 73.9% when the ammonia concentration is 150 mg/L.

关 键 词：氨氮 麦饭石 吸附 离子交换 

分 类 号：X703[环境科学与工程—环境工程]