潜流湿地中蛭石填料对氮磷的去除效果研究  

Effect of Nitrogen and Phosphorus Removal Using Vermiculite as Adsorbent in Subsurface-flow Wetlands

作　　者：胡艳[1] 胡曰利[1] 吴晓芙[1] 黄忠良[1] 

机构地区：[1]中南林业科技大学环境工程研究所,长沙湖南410004

出　　处：《江苏环境科技》2007年第3期5-8,共4页

基　　金：湖南省教育厅2004年产业化推广项目(2003-101).

摘　　要：研究了天然蛭石与生物蛭石的氨氮吸附能力。试验结果表明:天然理论饱和吸附量为2.56mg·g-1,天然蛭石在连续穿透试验中最大单位吸附量为1.768mg·g-1,在给定HRT条件下生物蛭石柱1与柱2的平均吸附量分别为0.0081mg·g-1与0.0064mg·g-1。运行20d里生物蛭石柱对氨氮的去除率一直在80%以上,结果显示仅在试验初期生物蛭石对磷有较好的去除效果。Experiments were carried out to evaluate the NH4^＋ adsorption capacity of natural vermiculite and bio-vermiculite systems. The highest NH4^＋ adsorption density of natural vermiculite was determined as 2.56 mg·g^-1 at saturated adsorption and 1.768 mg·g^-1 in the penetration tests The average NH4^＋ adsorption density at given HRT was found to be 0.0081mg·g^-1 and 0.0064mg·g^-1 for bio-vermiculite systems 1 and 2 respectively. Removal of NH4^＋-N by bio-vermiculite system was kept at rates higher than 80% within the tested period. The study also showed that the bio-vermicnlite system could remove a small amount of phosphorus only in the early stage.

关 键 词：氨氮吸附容量 天然蛭石 生物蛭石 潜流湿地 

分 类 号：X5[环境科学与工程—环境工程]