沸石改性及其对水中氨氮去除实验研究  

Experimental Study on Ammonia-nitrogen Removal in Wastewater by Modified Zeolite

作　　者：薛永强 石太宏[2] 陈栩迪 林晓冬[2] 余淑贤[2] 黄慧灵[2] 李泽华[2] 

机构地区：[1]广东省环境保护工程研究设计院,广东广州510635 [2]中山大学环境科学与工程学院,广东广州510275

出　　处：《广东化工》2015年第23期146-148,共3页Guangdong Chemical Industry

摘　　要：实验研究了改性沸石对水中氨氮的吸附效果及影响其吸附的主要因素,研究结果表明:焙烧改性对沸石的结构产生破坏,降低了沸石的吸附能力;酸改性沸石未能提高其对水中氨氮的去除率;碱改和盐改性的沸石对氨氮的吸附能力有增强作用,其中Na Cl、Na OH改性的沸石对氨氮的吸附能力增强作用较为明显。改性时间、温度、改性剂浓度对改性效果均有一定影响,其中温度越高,改性后沸石对氨氮的去除效果越好。改性温度达到70℃时,浓度为1.0 mol/L的Na OH溶液改性的沸石对氨氮的最大吸附量达到0.57 mg/g。Adsorption effect of modified zeolite on removal of Ammonia nitrogen in wastewater and the elements which affect the adsorption effect were investigated. The results showed that roasting modification would destruct the composition of the zeolite and consequently lower the ammonia nitrogen removal rate. Acid modification failed to boost the ammonia nitrogen removal rate. The modification by NaCI, NaOH apparently improved the ammonium absorption ability of the zeolite. Modification of different time, temperature and consistency had positive affect on the adsorption ability of the zeolite and in particular the higher the temperature is, the better the effect was. The optimal condition was that when the modification temperature got to 70 ℃, the ammonia-nitrogen adsorption capability of zeolites modified by NaOH with concentration of 1.0 mol/L was 0.57 mg/g.

关 键 词：沸石 改性 氨氮废水 吸附 

分 类 号：X5[环境科学与工程—环境工程]