篦齿眼子菜对废水中氮和磷的去除行为研究

一些常见的沉水草本植物对水质具有较强的净化作用,能够有效控制氮和磷的浓度。本试验通过模拟氮、磷污染的水质条件,采用篦齿眼子菜对氮、磷营养盐的吸附和去除效果进行研究。结果表明:设定模拟废水中的初始总氮(TN)浓度在1~50 mg/L范围内,培养30天后的植株对总氮的去除率最高可达85.4%,随着初始培养环境中总氮浓度的增加,去除效率呈下降的趋势;模拟废水水体中的总磷浓度范围为0.2~10.0 mg/L时,对总磷(TP)去除效率最高为78.3%。使用蓖齿眼子菜对实际的废水进行氮、磷营养盐的去除处理,效果较好。由此可见,水生植物富集废水中高浓度营养盐的能力具有较大的应用前景,本研究可为蓖齿眼子菜应用于废水预处理工艺提供可靠的理论支持。

Study on the Removal of Nitrogen and Phosphorus from Wastewater by Potamogeton pectinatus

Some common submerged herbs have strong purification effect on water quality,and can effectively control the concentration of nitrogen and phosphorus.By simulating the water quality conditions of nitrogen and phosphorus pollution,Potamogeton pectinatus is used to study the adsorption and removal effects of nitrogen and phosphorus nutrients.The results showed that when the initial concentration of TN in the simulated wastewater is in the range of 1~50 mg/L,the maximum removal rate of total nitrogen could reach 85.4%after 30 days of cultivation.With the increase of TN concentration in the initial culture environment,the removal efficiency tends to decrease.When the concentration of TP in the simulated wastewater is in the range of 0.2~10.0 mg/L,the maximum removal efficiency of TP is 78.3%.Using Potamogeton pectinatus to remove nitrogen and phosphorus from wastewater,the effect is better.Therefore,it can be seen that aquatic plants has a great application prospect for the enrichment of highconcentration nutrients in wastewater,and this study can provide reliable theoretical support for Potamogeton pectinatus in wastewater pretreatment process.