挂膜沸石覆盖技术修复富营养化水体的研究  

Bio-zeolite Covering Technology for Remediation of Eutrophic Water Bodies

作　　者：徐金兰[1] 黄廷林[1] 蔡道健[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《中国给水排水》2010年第19期37-40,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项项目(2009ZX07317-007-1-2);国家自然科学基金资助项目(50778147);陕西省国际合作重点项目[2010KW-24(1)]

摘　　要：将从水体沉积物中分离得到的硝化细菌、反硝化细菌固定在沸石上,利用挂膜沸石覆盖技术修复扬州段古运河和西安某人工湖两种富营养化水体。结果表明,对于沉积物的氮释放特性不同的两种水体,挂膜沸石覆盖技术均能有效抑制其内源氮的释放。扬州段古运河沉积物呈现初期释放氨氮、后期转化为硝态氮的特征,表面覆盖挂膜沸石层48 d后,上覆水体的TN浓度为0.34 mg/L(以硝态氮为主),沉积物中21%的总氮被去除。人工湖的沉积物则呈现持续释放氨氮的特征,以挂膜沸石层覆盖修复40 d后,上覆水体的TN浓度为0.49 mg/L(以氨氮为主),沉积物中52%的总氮被去除。Nitrifying bacteria and denitrifying bacteria separated from aquatic sediments were im- mobilized on natural zeolite, and the bio-zeolite covering technology was used to remediate two eutrophic water bodies of Grand Canal in Yangzhou section and artificial lake in Xi＇ an City. The results indicate that in spite of different nitrogen release characteristics from two aquatic sediments, the bio-zeolite cover- ing technology can effectively inhibit the release of nitrogen from the sediments. For the sediment taken from Grand Canal in Yangzhou section, the ammonia nitrogen is initially released and is later transformed into nitrate nitrogen. The concentration of total nitrogen （TN） in the overlying water is 0. 34 mg/L （based on nitrate nitrogen） , and 21% of TN in the sediment is removed after covering bio-zeolite for 48 days. For the sediment from artificial lake, the ammonia nitrogen is continuously released. The TN con- centration is 0.49 mg/L （ based on ammonia nitrogen） , and 52% of TN in the sediment is removed after covering bio-zeolite for 40 days.

关 键 词：挂膜沸石覆盖技术 富营养化水体 沉积物 氮释放 

分 类 号：X524[环境科学与工程—环境工程]