模拟湿地中磷的去除规律初步研究

通过在人工构建湿地"小宇宙"系统开展受控模拟实验,研究湿地湿生植物对水环境中磷的吸收和去除规律.本次研究,选择对比四种不同类型挺水植物和浮叶植物,在不同体系环境条件下(如溶解氧、pH)对水环境中磷吸收和去除.模拟实验通过对比四种不同类型的水生植物系统,结果显示,不同类型湿生植物对环境中磷的吸收强度和作用方式有较大的差别.总体来看,实验体系水体中正磷酸盐浓度下降趋势大致呈现的"三阶段"变化模式,即:坡降期、陡降期、平台期,不同期内磷去除率分别为:35.53%、29.98%和7.20%.

Primary Study on the Rule of Removing Phosphorus in Simulated Wetland

The rule of removing phosphorus in small-scale simulated wetland system has been studied. Considering the influence of the environmental factors as dissolved oxygen, pH, etc, we chose not only the aquatic plants, but also rooted emergent macrophyte as the experimental macrophytes. By contrasted four kinds of macrophyte systems, we found out that the absorbency and functionary mode of removing phosphorus by macrophytes are different. As a whole, we found out the three stages model of the density dropping of phosphorus, namely:slope lower stage, steep lower stage, steady lower stagehand the removal rate of each stage is:35.53%, 29.98% and 7.20%.