摘要
试验研究了粗砂、石灰石、钢渣、砂土、页岩、褐铁矿(2Fe2O33H2O)、磁铁矿(Fe3O4)等湿地填料对磷的等温吸附特性。结果表明,Freundlich和Langmuir都能描述上述填料对磷的吸附过程。粗砂、石灰石、钢渣、砂土、页岩、褐铁矿、磁铁矿对磷的理论饱和吸附量分别为18.66mg/kg,80.65mg/kg,1428.6mg/kg,34.84mg/kg,34.97mg/kg,71.94mg/kg和384.6mg/kg。影响填料吸附性的化学成分为Ca,Fe,Al,Mg和Mn。此外分析了填料对磷的吸附机理,预测了钢渣的预期使用年限为14年。
A bench scale experiment was conducted to investigate the substrate selected for a constructed wetland, which is consisted of sand, limestone, steel slag, soil, shale, limonite and magnetite, underscoring its function of phosphorus removing. Both Freundlich and Langmuir isomers were obtained for various ingredients of the substrate to identify their phosphorus adsorption capacities, and the life expectancy of steel slag was estimated.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2008年第4期17-21,共5页
Environmental Science & Technology
基金
中德合作官厅水库流域水环境治理关键技术研究项目资助(2002DFG00023)
关键词
人工湿地
填料
吸附
磷
constructed wetland
substrate
adsorption
phosphorus
