摘要
以抚仙湖流域马料河湖滨湿地基质为研究对象,进行了低浓度(P≤3.0mg/L)负荷条件的吸附动力学试验;以及低、高浓度磷的吸附等温线试验.结果表明,在初始磷浓度为0.02mg/L、0.03mg/L时,基质存在磷释放现象.当初始浓度增加到0.05mg/L时,基质开始吸附磷,24h后吸附趋于平衡状态.以一元线性回归法对上述基质的吸附等温线进行了Freundlich模型和Langmuir模型的回归分析,在此基础上,进行了高初始浓度下上覆水与基质振荡24h后基质对磷的吸附试验,结果表明在高浓度下,基质样品可在24h内释放原来吸附的大部分磷量.
The substrate of the riparian wetland of Maliao River, Lake Fuxian catchment, was selected to investigate the removal and transfer process of phosphorus. The experiments of adsorption dynamics was examined under the low concentration scenario（P ≤ 3.0mg/L）, and the experiment of adsorption isotherms also was examined under high and low concentration scenario. The results of dynamic adsorption showed that phosphorus release existed in the substrate when the initial concentrations of phosphorus were 0.02 and 0.03mg/L. The phosphorus had been adsorbed by substrate when the initial concentration had been increased to 0.5mg/L. Finally the adsorption curves tended to be stable after 24 hours. Regression analysis based on Freundlich model and Langmuir model on the adsorption isotherms of substrates was carried on by monadic linear regression method. Based on Freundlich model analysis, the adsorption experiment of phosphorus on substrate was examined between overlying water and substrate under the high initial concentration as well as 24 hours oscillation. The results showed that most of the phosphorus adsorbed originally in the substrate was released within 24 hours under high concentration condition.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2009年第5期675-681,共7页
Journal of Lake Sciences
基金
国家自然科学基金项目(40701176
40871026)
湖泊与环境国家重点实验室开放基金项目
南京工程学院引进人才科研启动基金项目(KXJ08020)
关键词
湿地
基质
上覆水
磷
吸附
抚仙湖
Wetland
substrate
overlying water
phosphorus
adsorption
Lake Fuxian
