MK-GP型沸石分子筛对低浓度氨氮废水的吸附机制  

Adsorption Mechanism of MK-GP Zeolite Molecular Sieve on Low Concentration of Ammonia Nitrogen Wastewater

作　　者：范冬晗 孟祥焘 傅金祥[2] FAN Dong-han;MENG Xiang-tao;FU Jin-xiang(Shenyang Huanke Environmental Protection Engineering Co.Ltd.,Shenyang 110623,China;School of Municipal and Environmental Engineering Shenyang Jianzhu University Shenyang 110168,China)

机构地区：[1]沈阳环科环保工程有限公司,辽宁沈阳110623 [2]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《中国给水排水》2022年第5期70-73,共4页China Water & Wastewater

摘　　要：以偏高岭土基地质聚合物为基本骨架,结合水热聚合反应生成具有晶体结构的沸石分子筛(MK-GP),对该材料进行表征,并针对低浓度氨氮废水进行吸附实验,考察MK-GP型沸石分子筛对水中氨氮的去除特性。结果表明,当氨氮浓度为5~7 mg/L时,MK-GP型沸石分子筛的吸附与准二级动力学模型拟合较好,当温度为298 K时,吸附热力学参数ΔH=4.181 9 kJ/mol、ΔS=0.015 6J/(mol·K),表明MK-GP型沸石分子筛去除氨氮是自发的吸热反应。该研究为低浓度氨氮废水的处理提供了一种绿色环保的新材料。Taking metakaolin base polymer as the basic skeleton, zeolite molecular sieve(type of MK-GP) with crystal structure was prepared by hydrothermal polymerization. The adsorbent was characterized and applied to adsorb low concentration of ammonia nitrogen wastewater, and the removal characteristics of low concentration of ammonia nitrogen by MK-GP zeolite molecular sieve were investigated. When the ammonia nitrogen concentration was 5-7 mg/L, the adsorption of MK-GP zeolite molecular sieve fitted well with the quasi-second-order kinetic model. The adsorption thermodynamic parameters ΔH and ΔS were 4.181 9 kJ/mol and 0.015 6 J/(mol·K) when the temperature was 298 K,indicating that the removal of ammonia nitrogen by MK-GP zeolite molecular sieve was a spontaneous endothermic reaction. Therefore, the studies proposed a new green and environmental material for low-concentration ammonia nitrogen wastewater treatment.

关 键 词：低浓度氨氮废水 偏高岭土基地质聚合物沸石分子筛 吸附机制 水热反应 

分 类 号：TU992[建筑科学—市政工程]