人工湿地基质磷吸附特性研究  

Adsorption Characteristics of Phosphorus in Substrate of a Constructed Wetland

作　　者：李远伟[1] 邓仕槐[1] 武俊英[1] 郑仁宏[1] 龙永波[1] 

机构地区：[1]四川农业大学环境科学与工程系,四川雅安625014

出　　处：《农业环境科学学报》2006年第B09期643-648,共6页Journal of Agro-Environment Science

摘　　要：选取较为常见的人工湿地基质(土壤、砂、砾石),研究了它们对磷的吸附特性。结果表明,土壤对磷的吸附随着振荡时间的增加而增加;沙和砾石的的吸附量在振荡时间为8 h最大;Langmuir方程、Freundlich方程、Temkin方程都能很好地拟合人工湿地基质对磷的等温吸附数量,其中Langmuir等温式的拟合程度最好;3种基质在磷吸附上不存在竞争吸附;3种基质对磷的吸附,均随着磷浓度的增大而减慢。Adsorption characteristics of phosphorus in substrate of a constructed wetland were studied with selected soil, sand and gravel. The results showed that： the adsorption of phosphorus in the soil increased with the increase of oscillating time. It was found that 8 h was the optimal oscillating time for both sand and gravel. The adsorption of phosphorus in the substrates could be fitted through Langmuir, Freundlich, Temkin equation well, and Langmuir equation was the optimum. Competition adsorption was non-existent in the mixed substrates. It has been also discovered that the adsorption of phosphorus in soil, sand and gravel reduced with the increase of phosphorus concentrations.

关 键 词：基质 磷 等温吸附 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]