氨氮在垂向河床渗滤系统中的环境行为  

Environmental Behavior of NH_4^+-Nin System of Vertical River Bank Filtration

作　　者：黄瑞华[1] 吴耀国[2] 杨炳超[3] 妙颖[3] 

机构地区：[1]中国海洋大学化学化工学院,山东青岛266003 [2]西北工业大学理学院,陕西西安710072 [3]长安大学环境科学与工程学院,陕西西安710054

出　　处：《地球科学与环境学报》2006年第1期92-95,共4页Journal of Earth Sciences and Environment

基　　金：陕西省水利厅河岸渗滤过程中氮污染环境行为特征研究项目

摘　　要：采用自行设计的室内土柱实验装置,以恒定氨氮质量浓度为18.27 mg/L的氯化铵溶液为淋滤液,模拟氨氮在垂向河床中的渗滤过程,来探讨氨氮在垂向河床渗滤系统中的环境行为,借以了解河床渗滤系统对氮污染的净化机理。研究结果表明:氨氮在河床渗滤过程中分别参与吸附及硝化作用,主要发生在距离河床1~3 cm处;由于这两种作用的影响,该河床渗滤系统对氨氮的去除率达87%。同时还发现,该河床渗滤系统对氨氮的硝化能力有限,可以考虑向污水中补充溶解氧及添加石灰等强化措施来提高硝化能力。This paper designed experiment installation to study the environmental behaviors of NH4^＋ - N in the vertical river bank filtration system. The NH4C1 solution with a steady NH4^＋ - N concentration （18. 27 mg/L） served is taken as filtering solution. Through this experiment, the purifying mechanism of nitrogen pollution in the system was revealed. Results indicated that NH4^＋ -N takes part both in absorption and nitrification processes during the river bank filtration; owing to above effects, about 87 percent of NH4^＋ - N is cleaned though the river bank filtration system, but the nitrification capability is limited, some measures can be taken to enhance the cleaning capability, they include supplying dissolved oxygen and adding lime in the pollutant water.

关 键 词：氨氮 河床渗滤 环境行为 土柱模拟 氯化铵 

分 类 号：X523[环境科学与工程—环境工程]