改性沸石去除微污染水中氨氮的试验  

Removal of ammonia nitrogen in micro-polluted water by modified zeolite

作　　者：朱丰华[1] 任刚[1] 李明玉[1] 林达红[1] 王建平 林浩添 

机构地区：[1]暨南大学环境工程系,广东广州510630 [2]广州市自来水公司,广东广州510160

出　　处：《暨南大学学报（自然科学与医学版）》2010年第3期286-289,298,共5页Journal of Jinan University(Natural Science & Medicine Edition)

基　　金：广东省科技计划重大项目(2006A36802001);广东省"十一五"重大科技项目(2007A032400001);省部产学研合作项目(2008A030202010)

摘　　要：采用壳聚糖和氢氧化钠对天然沸石进行了改性,制备了新型改性沸石,并采用吸附-混凝的处理方法,对微污染水中氨氮的去除进行了试验研究.通过扫描电镜和能谱分析对沸石进行了表征;考察了吸附时间、pH、氨氮初始质量浓度和沸石投加质量浓度等因素对氨氮去除效果的影响.结果表明,在氨氮初始质量浓度为2.51 mg.L-1的微污染水中,投加质量浓度为1 g.L-1的改性沸石,氨氮去除率达到70.8%,更适用于现有的自来水工艺.A new modified zeolite adsorbent was prepared by natural zeolite,chitosan and sodium hydroxide.The adsorbent was used to remove ammonia nitrogen from micro-polluted water by using the methods of adsorption and coagulation.The as-prepared adsorbent was characterized by SEM and EDS.The effects of the adsorption time,pH value,inital concentration of ammonia nitrogen and dosing quantity on the removal of ammonia nitrogen were also investigated.The results show that,when the dosing quantity of modified zeolite was 1 g·L^-1,70.8% of the ammonia nitrogen in micro-polluted water（2.51 mg·L^-1） could be removed,which indicate that this new modified zeolite adsorbent could be used in the existing water processing.

关 键 词：微污染水 氨氮 改性沸石 壳聚糖 

分 类 号：TU991.2[建筑科学—市政工程] X703.1[环境科学与工程—环境工程]