金鱼藻对阳宗海主要污染物净化效果的实验研究

Experimental Research About the Purification Effect of Ceratophyllum demersum on Major Pollutants in Yangzonghai Lake

金鱼藻具有较强的水质净化能力,可降低水体营养盐,吸附重金属。其作为阳宗海流域中分布广泛的沉水植物,必将对阳宗海主要污染物发挥一定的净化作用。结合阳宗海主要污染物情况,设计净化效果梯级试验、正交实验,探究金鱼藻对阳宗海特征污染物(总氮、总磷、砷)的净化效果。结果表明:当N处于高浓度,As、P处于低浓度时,金鱼藻水质净化平均处理效率最佳。结合阳宗海水质状况,推断金鱼藻自身水质净化效率能发挥到85%以上。该实验结果为合理利用金鱼藻改善阳宗海水质提供了科学依据。

Ceratophyllum demersum has a strong water purification capacity,can reduce water nutrients and adsorb heavy metals.As a widely distributed submerged plant in the Yangzonghai watershed,it is expected to play a significant role in purifying the major pollutants in Yangzonghai Lake.Based on the primary pollutants in Yangzonghai Lake,this study designed a series of graded purification effect experiments and orthogonal tests to analyze the purification efficiency of Ceratophyllum demersum against characteristic pollutants in the lake(total nitrogen,total phosphorus,and arsenic).The research indicates that the average water purification efficiency of Ceratophyllum demersum is optimal when nitrogen presents at high concentrations.Arsenic and phosphorus are at low concentrations.Based on the water quality conditions of Yangzonghai Lake,it is inferred that the water purification efficiency of Ceratophyllum demersum itself can exceed 85%.The findings provide a scientific basis for the rational utilization of Ceratophyllum demersum in improving the water quality of Yangzonghai Lake.